Engine Rebuild Part 2
4wd Low
Joined: Oct 2016
Posts: 14
Likes: 1
Hey AB. I just read and wrote notes on your build just last night. I got I think all parts list except pushrods. If you would not mind verify few of your numbers. You shaved .030 of the block , planed the head by .005 just to clean up. and pistons are .030 over. CR 9.0 ? . I understand every build is different . I'm in the process finding the specs for the 300/4.9 , deck height rod lengths ect. ect .
I will probably start my own thread once get things rolling. As for a 1983 down engine was basically did not want the 84-86 pedestal head. more steps to change to earlier style screw in rocker studs.. but picked up a 84 engine for $100 with complete gasket set new in box and new boxed motor mounts. even came with alt. just missing push rods. no big deal. my local long time machine shop might have 65-68 rods and a 240 head. that might be changing the build a little if i get them.
If don't mind you using 87 oct gas if i read correct. CR was 9.0 , 9.2 ? how is your mpg guesstimate . Why I loved your build you really put thought into it. Not just all out ***** wild . but rather good combo common sense and enjoyable power for a driver.
I'm not a real religious person. but I SINCERELY wish and pray for you and your wife for a long healthy life FULL recovery. I MEAN that ! basically my daughters age. My problems are just old age creeping in lol.
Do you know what the term "golden years" means ? It just means peeing more when your older HAHAHA
Thank you again for your time
I will probably start my own thread once get things rolling. As for a 1983 down engine was basically did not want the 84-86 pedestal head. more steps to change to earlier style screw in rocker studs.. but picked up a 84 engine for $100 with complete gasket set new in box and new boxed motor mounts. even came with alt. just missing push rods. no big deal. my local long time machine shop might have 65-68 rods and a 240 head. that might be changing the build a little if i get them.
If don't mind you using 87 oct gas if i read correct. CR was 9.0 , 9.2 ? how is your mpg guesstimate . Why I loved your build you really put thought into it. Not just all out ***** wild . but rather good combo common sense and enjoyable power for a driver.
I'm not a real religious person. but I SINCERELY wish and pray for you and your wife for a long healthy life FULL recovery. I MEAN that ! basically my daughters age. My problems are just old age creeping in lol.
Do you know what the term "golden years" means ? It just means peeing more when your older HAHAHA
Thank you again for your time
Thread Starter
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Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
Hey AB. I just read and wrote notes on your build just last night. I got I think all parts list except pushrods. If you would not mind verify few of your numbers. You shaved .030 of the block , planed the head by .005 just to clean up. and pistons are .030 over. CR 9.0 ? . I understand every build is different . I'm in the process finding the specs for the 300/4.9 , deck height rod lengths ect. ect .
The head was then just enough to clean it up. I spent about $650 on the professional porting and polishing to fit the enlarged valves, and want plenty of meat left on it in case I ever need to clean it up again.
Pistons were 0.030" over, and then I went with 19cc pistons from a 351w V8 (hence my need for the 65 - 68 connecting rods with the 0.912" wristpin).
I listed the stock heights and lengths somewhere, but here they are again:
Stock Deck Height: 10.000"
Stock Piston Depth: 0.037"
Crank throw: 1.99" (1.99 * 2 = 3.98" stroke)
Rod Length: 6.208"
Compression Distance: 1.765"
6.208 + 1.99 + 1.765 + 0.037 = 10.000
I then chose the high performance head gasket from FelPro which was slightly thinner and good for roughly a 0.17 compression bump.
My final compression was 9.11
I will probably start my own thread once get things rolling. As for a 1983 down engine was basically did not want the 84-86 pedestal head. more steps to change to earlier style screw in rocker studs.. but picked up a 84 engine for $100 with complete gasket set new in box and new boxed motor mounts. even came with alt. just missing push rods. no big deal. my local long time machine shop might have 65-68 rods and a 240 head. that might be changing the build a little if i get them.
That '84 engine for $100 is a good deal.
As for push rods, you wouldn't want them anyway. If you're going to have your head reworked for screw in studs, you'll want to measure and match the pushrods to your engine and stock will more than likely not work.
If don't mind you using 87 oct gas if i read correct. CR was 9.0 , 9.2 ? how is your mpg guesstimate . Why I loved your build you really put thought into it. Not just all out ***** wild . but rather good combo common sense and enjoyable power for a driver.
I also forgot to get back to you on the mpg. Right now, I'm averaging around 12mpg around town and 15 - 16 on the open road. I haven't had it on many long distance trips since I put it in, but the one I went on, I got about 14 at 80mph (and I forgot the hubs were locked on the drive too), so I think it does reasonably well.
And thank for the compliments, that's exactly what I was shooting for. I wanted it to have a significant boost in power, but I also wanted it comfortable to drive, still "reasonably" economical, and most of all, reliable. So far, so good!
I'm not a real religious person. but I SINCERELY wish and pray for you and your wife for a long healthy life FULL recovery. I MEAN that ! basically my daughters age. My problems are just old age creeping in lol.
Thread Starter
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Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
A big round of applause for ford-trucks.com. They've gone through and downloaded all of the missing photobucket pictures from photobucket and hosted them on the forum. So, about 95% of my pictures were back. The other 5% I put up on supermotors and made new links. You guys rock (if any of you are reading this).
So, all of the pictures are back up.
The roller rockers have been everything I hoped they would be. They have a nice, smooth click to them as they hum along and that horrendous squeaking/chirping is gone. Thanks again to everyone who helped me out on getting them. You're all awesome!
In other news though, my Bronco was rear ended at a stop light a few weeks ago and the body's all twisted up. The insurance is claiming it a total loss and even if I do squeeze more out of them, it'll cost a fortune to repair it all. Still driving it every day, but I'll be pulling the engine in a little while and putting into a new Bronco. Just glad they didn't hit it from the front! But, sucks to be losing my Bronco. It's like losing a pet.
You guys rock (if any of you are reading this).So, all of the pictures are back up.
The roller rockers have been everything I hoped they would be. They have a nice, smooth click to them as they hum along and that horrendous squeaking/chirping is gone. Thanks again to everyone who helped me out on getting them. You're all awesome!
In other news though, my Bronco was rear ended at a stop light a few weeks ago and the body's all twisted up. The insurance is claiming it a total loss and even if I do squeeze more out of them, it'll cost a fortune to repair it all. Still driving it every day, but I'll be pulling the engine in a little while and putting into a new Bronco. Just glad they didn't hit it from the front!
But, sucks to be losing my Bronco. It's like losing a pet.
Posting Guru
Joined: Jun 2012
Posts: 1,061
Likes: 9
From: Mims, FL
Man, that sux about the Bronco! I drive my old '81 F100 every day and I know any kind of a more than minor fender bender would total it out because of value. Have you found a decent replacement Bronco yet? I don't look at them all the time but don't notice too many that have 300s in them, altho I guess you could put yours in it regardless of what's in there.
Elder User
Joined: Apr 2012
Posts: 544
Likes: 6
From: Kalispell, MT
Bummer deal man! A fella's truck is like a member of the family. Have you found a bronco down that way yet?
I wanna drop a 300 into a bullnose crewcab. They're super tough to find though. Most are rusted out or really beaten up.
If you need me to keep an eye out up here, let me know if there are any specifics that you're looking for.
I wanna drop a 300 into a bullnose crewcab. They're super tough to find though. Most are rusted out or really beaten up.
If you need me to keep an eye out up here, let me know if there are any specifics that you're looking for.
Thread Starter
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Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
Thanks guys, I actually did find one. It had been sitting for a while and had all the stuff that brings the price down but are easy things to fix, like a cracked windshield, busted wing window (already fixed), etc. so I got a good deal on it.
It has all the goodies I've never had before like carpet, headliner, A/C, cruise, which I'm excited about.
It's an '85 with a 302 and AOD. I'll be swapping my engine into it first, and then later I'll convert it to a manual. It has 3.55 gears, so I'm debating between the NP435 or looking for a ZF5 so I can have overdrive. The 435 was great with the 3.00 gears, but will be a bit high on the RPMs for highway driving.
It is also fuel injected, so I'm thinking of keeping that and fuel injecting my 300. For a daily driver, I think I'm just kinda tired of dinking around with carbs and always trying to get it to run right. Even though the 302 is pretty weak compared to my 300, I am really enjoying the instant throttle and lack of faltering and lean spots.
It has all the goodies I've never had before like carpet, headliner, A/C, cruise, which I'm excited about.
It's an '85 with a 302 and AOD. I'll be swapping my engine into it first, and then later I'll convert it to a manual. It has 3.55 gears, so I'm debating between the NP435 or looking for a ZF5 so I can have overdrive. The 435 was great with the 3.00 gears, but will be a bit high on the RPMs for highway driving.
It is also fuel injected, so I'm thinking of keeping that and fuel injecting my 300. For a daily driver, I think I'm just kinda tired of dinking around with carbs and always trying to get it to run right. Even though the 302 is pretty weak compared to my 300, I am really enjoying the instant throttle and lack of faltering and lean spots.
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Lead Driver
Joined: Dec 2000
Posts: 6,293
Likes: 47
From: South central, Minnesota
Thanks guys, I actually did find one. It had been sitting for a while and had all the stuff that brings the price down but are easy things to fix, like a cracked windshield, busted wing window (already fixed), etc. so I got a good deal on it.
It has all the goodies I've never had before like carpet, headliner, A/C, cruise, which I'm excited about.
It's an '85 with a 302 and AOD. I'll be swapping my engine into it first, and then later I'll convert it to a manual. It has 3.55 gears, so I'm debating between the NP435 or looking for a ZF5 so I can have overdrive. The 435 was great with the 3.00 gears, but will be a bit high on the RPMs for highway driving.
It is also fuel injected, so I'm thinking of keeping that and fuel injecting my 300. For a daily driver, I think I'm just kinda tired of dinking around with carbs and always trying to get it to run right. Even though the 302 is pretty weak compared to my 300, I am really enjoying the instant throttle and lack of faltering and lean spots.
It has all the goodies I've never had before like carpet, headliner, A/C, cruise, which I'm excited about.
It's an '85 with a 302 and AOD. I'll be swapping my engine into it first, and then later I'll convert it to a manual. It has 3.55 gears, so I'm debating between the NP435 or looking for a ZF5 so I can have overdrive. The 435 was great with the 3.00 gears, but will be a bit high on the RPMs for highway driving.
It is also fuel injected, so I'm thinking of keeping that and fuel injecting my 300. For a daily driver, I think I'm just kinda tired of dinking around with carbs and always trying to get it to run right. Even though the 302 is pretty weak compared to my 300, I am really enjoying the instant throttle and lack of faltering and lean spots.
Being a 85 does it have the 8.8" rear instead of the 9"? Being a 3.55 gears I'm going to guess, yes. You might want to keep the diffs out of you old Bronc just in case.
I still remember the tire and axle falling off my 87 Bronco when it dropped a C-clip. If you are going to run the AOD on your 300 make sure to get the correct flexplate. Otherwise there will be a whole lot shaking going on.
Going from the NP435 to the AOD is going to feel like you lost 50hp. But when you do swap the NP435 in it'll feel like you gained 100hp. You shouldn't have a problem running NP435 with 3.55's on the highway. You have to remember your tires are a little larger then stock. If you are worried about 3.55's you'd really be freaked by the 4.11's & NP435 going in my E350.
The ZF is great but the NP435 is tougher and easier to work on.Are you thinking a stock EFI system or the aftermarket throttle body set up? Or megasquirt? I don't know how well the stock set up will like all your mods. EFI is great when it's working. Not so great if something goes wrong. Sitting on the side of the road or in a parking lot somewhere with no spare parts. That's where the carb will always have the efi beat. It's a whole lot easier to repair it and get you home when there is a problem.
Keep us posted on your progress on the new Bronco.
Thread Starter
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Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
Also, in other news, my wife was declared cancer free today! Man, I've been waiting a while to hear that!! A checkup in a few months just to be sure, but otherwise, she's done. Talk about loads of stress off, hah! Thank you all again who gave out your support.
On the Bronco, yeah, besides my '81's rugged charm, it wasn't exactly a showpiece. This one's going to shine when I get done. I figured I drive it every day, so I'm going to get the most out of this situation and get a nice one. Getting some quotes on a little bit of rust repair and a paint job right now.
And yes, it has the 8.8. Not my favorite, but aside from people complaining about the c-clip design, I've never actually heard of anyone having a problem with one. (Until now) I do have a 3.50 9" in my garage though, so I think I'm going to build that one up with some limited slip or something and then swap it in down the road.
As it sits right now, 32" tires, 3.00, and the 1:1 final, I'm at around 2600 RPMs at 80mph, which is the speed limit out on the interstate in Idaho. A 3.55 is going to bump that up to around 3100. Even if the engine can take it (which I know won't be a problem), it's going to say goodbye to any semblance of gas mileage. The NP-435 is my favorite transmission but I just wish it had an overdrive gear. The ZF5 will put me back down around 1950, which will be really nice. Granted, I don't take it out on the interstate every day, but I do like to drive it long distance quite regularly.
The other thought is 4.11s and a ZF5. Lots of grunt and about the same highway RPMs as I am right now. Or put my 3.00s back in and keep the NP435.
Only issue I run into with a 4x4 is that gear changes require me to change the front differential too.
On the EFI, I starting a new thread on it and will post more there:
https://www.ford-trucks.com/forums/1...ransplant.html
But, I thought about using the stock system with a megasquirt, but felt that was just too complicated at the time being. The aftermarket self learning TIB setups have really come down in price and have amazing reviews. So, I'm probably going to sell my DP intake and get a C and a TIB. The other perk is I can throw my spare Holley in a box in the back in case I ever do get into a real issue out in the boonies with the EFI. I'd just have to keep a fuel pressure restrictor on hand, but I could swap it out and get home.
More than anything, I am just exhausted with trying to get a carb to run right on my engine. Maybe I just don't have the knack, but after years and tinkering and tuning, I've never really gotten one to run all that great and I'm kinda done.
On the Bronco, yeah, besides my '81's rugged charm, it wasn't exactly a showpiece. This one's going to shine when I get done. I figured I drive it every day, so I'm going to get the most out of this situation and get a nice one. Getting some quotes on a little bit of rust repair and a paint job right now.
And yes, it has the 8.8. Not my favorite, but aside from people complaining about the c-clip design, I've never actually heard of anyone having a problem with one. (Until now) I do have a 3.50 9" in my garage though, so I think I'm going to build that one up with some limited slip or something and then swap it in down the road.
As it sits right now, 32" tires, 3.00, and the 1:1 final, I'm at around 2600 RPMs at 80mph, which is the speed limit out on the interstate in Idaho. A 3.55 is going to bump that up to around 3100. Even if the engine can take it (which I know won't be a problem), it's going to say goodbye to any semblance of gas mileage. The NP-435 is my favorite transmission but I just wish it had an overdrive gear. The ZF5 will put me back down around 1950, which will be really nice. Granted, I don't take it out on the interstate every day, but I do like to drive it long distance quite regularly.
The other thought is 4.11s and a ZF5. Lots of grunt and about the same highway RPMs as I am right now. Or put my 3.00s back in and keep the NP435.
Only issue I run into with a 4x4 is that gear changes require me to change the front differential too.
On the EFI, I starting a new thread on it and will post more there:
https://www.ford-trucks.com/forums/1...ransplant.html
But, I thought about using the stock system with a megasquirt, but felt that was just too complicated at the time being. The aftermarket self learning TIB setups have really come down in price and have amazing reviews. So, I'm probably going to sell my DP intake and get a C and a TIB. The other perk is I can throw my spare Holley in a box in the back in case I ever do get into a real issue out in the boonies with the EFI. I'd just have to keep a fuel pressure restrictor on hand, but I could swap it out and get home.
More than anything, I am just exhausted with trying to get a carb to run right on my engine. Maybe I just don't have the knack, but after years and tinkering and tuning, I've never really gotten one to run all that great and I'm kinda done.
Lead Driver
Joined: Dec 2000
Posts: 6,293
Likes: 47
From: South central, Minnesota
Also, in other news, my wife was declared cancer free today! Man, I've been waiting a while to hear that!! A checkup in a few months just to be sure, but otherwise, she's done. Talk about loads of stress off, hah! Thank you all again who gave out your support.
On the Bronco, yeah, besides my '81's rugged charm, it wasn't exactly a showpiece. This one's going to shine when I get done. I figured I drive it every day, so I'm going to get the most out of this situation and get a nice one. Getting some quotes on a little bit of rust repair and a paint job right now.
And yes, it has the 8.8. Not my favorite, but aside from people complaining about the c-clip design, I've never actually heard of anyone having a problem with one. (Until now) I do have a 3.50 9" in my garage though, so I think I'm going to build that one up with some limited slip or something and then swap it in down the road.
As it sits right now, 32" tires, 3.00, and the 1:1 final, I'm at around 2600 RPMs at 80mph, which is the speed limit out on the interstate in Idaho. A 3.55 is going to bump that up to around 3100. Even if the engine can take it (which I know won't be a problem), it's going to say goodbye to any semblance of gas mileage. The NP-435 is my favorite transmission but I just wish it had an overdrive gear. The ZF5 will put me back down around 1950, which will be really nice. Granted, I don't take it out on the interstate every day, but I do like to drive it long distance quite regularly.
The other thought is 4.11s and a ZF5. Lots of grunt and about the same highway RPMs as I am right now. Or put my 3.00s back in and keep the NP435.
Only issue I run into with a 4x4 is that gear changes require me to change the front differential too.
On the EFI, I starting a new thread on it and will post more there:
https://www.ford-trucks.com/forums/1...ransplant.html
But, I thought about using the stock system with a megasquirt, but felt that was just too complicated at the time being. The aftermarket self learning TIB setups have really come down in price and have amazing reviews. So, I'm probably going to sell my DP intake and get a C and a TIB. The other perk is I can throw my spare Holley in a box in the back in case I ever do get into a real issue out in the boonies with the EFI. I'd just have to keep a fuel pressure restrictor on hand, but I could swap it out and get home.
More than anything, I am just exhausted with trying to get a carb to run right on my engine. Maybe I just don't have the knack, but after years and tinkering and tuning, I've never really gotten one to run all that great and I'm kinda done.
On the Bronco, yeah, besides my '81's rugged charm, it wasn't exactly a showpiece. This one's going to shine when I get done. I figured I drive it every day, so I'm going to get the most out of this situation and get a nice one. Getting some quotes on a little bit of rust repair and a paint job right now.
And yes, it has the 8.8. Not my favorite, but aside from people complaining about the c-clip design, I've never actually heard of anyone having a problem with one. (Until now) I do have a 3.50 9" in my garage though, so I think I'm going to build that one up with some limited slip or something and then swap it in down the road.
As it sits right now, 32" tires, 3.00, and the 1:1 final, I'm at around 2600 RPMs at 80mph, which is the speed limit out on the interstate in Idaho. A 3.55 is going to bump that up to around 3100. Even if the engine can take it (which I know won't be a problem), it's going to say goodbye to any semblance of gas mileage. The NP-435 is my favorite transmission but I just wish it had an overdrive gear. The ZF5 will put me back down around 1950, which will be really nice. Granted, I don't take it out on the interstate every day, but I do like to drive it long distance quite regularly.
The other thought is 4.11s and a ZF5. Lots of grunt and about the same highway RPMs as I am right now. Or put my 3.00s back in and keep the NP435.
Only issue I run into with a 4x4 is that gear changes require me to change the front differential too.
On the EFI, I starting a new thread on it and will post more there:
https://www.ford-trucks.com/forums/1...ransplant.html
But, I thought about using the stock system with a megasquirt, but felt that was just too complicated at the time being. The aftermarket self learning TIB setups have really come down in price and have amazing reviews. So, I'm probably going to sell my DP intake and get a C and a TIB. The other perk is I can throw my spare Holley in a box in the back in case I ever do get into a real issue out in the boonies with the EFI. I'd just have to keep a fuel pressure restrictor on hand, but I could swap it out and get home.
More than anything, I am just exhausted with trying to get a carb to run right on my engine. Maybe I just don't have the knack, but after years and tinkering and tuning, I've never really gotten one to run all that great and I'm kinda done.
That's awesome news!! Congrats.
Your 81 was a show truck compared to my vehicles.
The 8.8" is a tough diff. It's just got a few issues. The two main ones are the C-clips and the big one is the axle bearing design. The axle shaft itself is the inner race of the bearing. So when the bearings go it can also destroy the axle shaft. Then you are stuck either replacing the shafts or running a problem solver type of bearing. And getting the old bearings out can be a royal nightmare. But I wouldn't worry about the 8.8" until you have an issue. And that could be a very long time.
The gearing is really your preference. The 3.55's are the best all around gear set. The give decent acceleration and are still liveable on the highway( yes the 300 will be running faster and be down some on the mpg on the highway over the 3.00:1 ) . But I think once you drive the AOD behind the 300 you might be wishing you had 4.11's. The 4.11/ZF combo would give you the best go with still decent highway manors. But if you are happy with with the 81's performance then the NP435/3.00 would be the cheapest solution since you've already have all the parts and pieces.
That is the down side to the 4x4, double the gear changes for a swap and a little worse on the fuel mileage. But when you need the 4wd, it's a whole lot nicer having it then wishing you did.
I never really cared for the stock EFi set up. The upper intake makes working on the engine more of a pain and the tiny throttle body does not help at all on a modified engine. The long runners are nice but I'd rather run the Offy C-series or clifford intake. You can either weld in the injector bungs or run the TBI. Then you get all the efi benefits but can still pull a valve cover without pulling half the engine apart.
I do like you your idea of having a pressure regulator and carb with as a back up.
Laughing Gas
Joined: Dec 2010
Posts: 924
Likes: 1
that's awesome news! Happy for you bud! God bless you both!
Thread Starter
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Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
So some good news:
Even though this Bronco will soon be going, I still have to have it pass emissions in the mean time. It passed on it's very first try! About the only thing I did was back the timing down to around 6° and lean out the idle to around 14.5 AFR. I'll set it back to where it's happy when I get home.
But, it's nice knowing that even with the performance cam, enlarged valves, etc. etc. I don't have any issues passing emissions.
Idle:
CO: 0.36 / 1.20 allowed
HC: 163 / 220 allowed
Cruise:
CO: 0.27 / 1.20 allowed
HC: 76 / 220 allowed
Even though this Bronco will soon be going, I still have to have it pass emissions in the mean time. It passed on it's very first try! About the only thing I did was back the timing down to around 6° and lean out the idle to around 14.5 AFR. I'll set it back to where it's happy when I get home.
But, it's nice knowing that even with the performance cam, enlarged valves, etc. etc. I don't have any issues passing emissions.
Idle:
CO: 0.36 / 1.20 allowed
HC: 163 / 220 allowed
Cruise:
CO: 0.27 / 1.20 allowed
HC: 76 / 220 allowed
Trailering
Joined: Sep 2017
Posts: 17
Likes: 0
300 6
Alright, let's try this again.
Off and on I've tried to get an engine rebuilt for my Bronco. Losing my job and then going back to school for 2 years for another degree kinda sorta put that on hold.
But now that I'm back working and things are a little easier financially, it's time to start again.
Here's the link to the previous thread I started on it. Figured it'd be better to start over than attach to the end of that one:
https://www.ford-trucks.com/forums/1...e-rebuild.html
The engine I'm working on is one I got off of Craigslist for $50 (delivered!). I ran it in the Bronco for about a year, but despite the fact that it ran very well, strong, and had great compression (about 150 - 160), it was terribly noisy, so I pulled it and swapped in the engine that came attached to the front of my my NP-435 transmission that I swapped in. This particular one has around 120 compression and has some blowby, but it's getting me by.
So, time to rebuild the $50 one. I pulled it all apart and didn't find anything wrong with it, so I have no idea why it was so noisy. Who knows, some new lifters might have just cleared everything right up.
The engine is in pristine shape. There are NO ridges at the top of the cylinder walls. None. I was able to slide all 6 pistons out without any trouble. All of the bearings were a clean, silver mirror finish, aside from two pistons. I am hopeful it won't take much, if anything, to clean it up.
My goal for the engine is a little bit more compression (around 9.0, nothing fancy), and some extra power. I'd love to get it to around 200hp, which would make me plenty happy.
Some head work, larger valves, performance cam, and just build it to be good, strong daily driver that I can off-road with when needs be. As much as I love my Bronco for hitting the trails, I have to keep in mind that it's my daily driver and sees 95% street.
Here's the engine as it's sat for the last few years. About the only thing I'd done is pulled the cam out a while back to inspect it.
The clutch was a bit rusted up from just sitting around. I have a new clutch/pressure plate/flywheel in the Bronco now, so I'll probably just recycle this stuff. The flywheel looks good though, so I might resurface it for a spare.
The head's been off for a while so it's a bit rusty, but it turned over with ease. I had to jam a crowbar behind the flywheel to keep it from spinning so I could undo the bolts.
Do NOT want to forget to install this. Been there... done that... It's heart sinking.
Forgot that I hadn't drained the oil... Nice mess to clean up.
Removed the oil pan and undid the main bearings.
Everything is nice and smooth:
These cranks are heavy
Unbolted the pistons and slid them out the top. As said, there was no ridge, so they came right out. The pistons were not stamped with an oversize number, so I imagine they're originals.
About the only wear I could find:
Close up of the cylinder walls. The oil is only from turning it over:
I dropped the block and crank off at the shop this morning, so I should hear back soon as to their condition. Hopefully all is well and cleaning it up will be relatively painless. He said he'd done performance work on 300s before and said the biggest issue he generally runs into is lack of aftermarket pistons for higher compression. But I do like hearing that he was well acquainted with it.
https://www.facebook.com/pages/Moffi...42851469094650
I'll post more when I get them back!
Off and on I've tried to get an engine rebuilt for my Bronco. Losing my job and then going back to school for 2 years for another degree kinda sorta put that on hold.
But now that I'm back working and things are a little easier financially, it's time to start again.
Here's the link to the previous thread I started on it. Figured it'd be better to start over than attach to the end of that one:
https://www.ford-trucks.com/forums/1...e-rebuild.html
The engine I'm working on is one I got off of Craigslist for $50 (delivered!). I ran it in the Bronco for about a year, but despite the fact that it ran very well, strong, and had great compression (about 150 - 160), it was terribly noisy, so I pulled it and swapped in the engine that came attached to the front of my my NP-435 transmission that I swapped in. This particular one has around 120 compression and has some blowby, but it's getting me by.
So, time to rebuild the $50 one. I pulled it all apart and didn't find anything wrong with it, so I have no idea why it was so noisy. Who knows, some new lifters might have just cleared everything right up.
The engine is in pristine shape. There are NO ridges at the top of the cylinder walls. None. I was able to slide all 6 pistons out without any trouble. All of the bearings were a clean, silver mirror finish, aside from two pistons. I am hopeful it won't take much, if anything, to clean it up.
My goal for the engine is a little bit more compression (around 9.0, nothing fancy), and some extra power. I'd love to get it to around 200hp, which would make me plenty happy.
Some head work, larger valves, performance cam, and just build it to be good, strong daily driver that I can off-road with when needs be. As much as I love my Bronco for hitting the trails, I have to keep in mind that it's my daily driver and sees 95% street.
Here's the engine as it's sat for the last few years. About the only thing I'd done is pulled the cam out a while back to inspect it.
The clutch was a bit rusted up from just sitting around. I have a new clutch/pressure plate/flywheel in the Bronco now, so I'll probably just recycle this stuff. The flywheel looks good though, so I might resurface it for a spare.
The head's been off for a while so it's a bit rusty, but it turned over with ease. I had to jam a crowbar behind the flywheel to keep it from spinning so I could undo the bolts.
Do NOT want to forget to install this. Been there... done that... It's heart sinking.
Forgot that I hadn't drained the oil... Nice mess to clean up.
Removed the oil pan and undid the main bearings.
Everything is nice and smooth:
These cranks are heavy
Unbolted the pistons and slid them out the top. As said, there was no ridge, so they came right out. The pistons were not stamped with an oversize number, so I imagine they're originals.
About the only wear I could find:
Close up of the cylinder walls. The oil is only from turning it over:
I dropped the block and crank off at the shop this morning, so I should hear back soon as to their condition. Hopefully all is well and cleaning it up will be relatively painless. He said he'd done performance work on 300s before and said the biggest issue he generally runs into is lack of aftermarket pistons for higher compression. But I do like hearing that he was well acquainted with it.
https://www.facebook.com/pages/Moffi...42851469094650
I'll post more when I get them back!