Rebuild Engine!!!!!

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Jul 3, 2001 | 08:09 AM

larry derouin

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Joined: Apr 2001

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From: Glen Burnie Maryland

Rebuild Engine!!!!!

Jul 4, 2001 | 12:48 PM

Fracster

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Joined: Jun 2001

Posts: 48

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From: Spokane

Rebuild Engine!!!!!

I recently did a rebuild on this engine, New pistons and rings, new bearings and she fires right up and seems to run good. Wow what a dissapointment this motor can barely pull its own weight. Any help here, I have a 6" lift and I think the front brake calipers might be locking up a bit. my plans are to rebuild the calipers, what I did was release the calipers and it rolled freely then took it for a spin. It seems very under powered even with the calipers free. I'm also experiencing overheating, so I shut her down early, new radiator, and new thermostat, its missing a fan shroud, how important is the shroud? My dad states it absolutely needs the shroud, I agree but haven't found the correct one at the salvage yard yet

I'm thinking of dropping a V-8 in it, is there a prefered engine for these trucks and I've read the bell housing needs changed. Due you have to change anything else aside from the motor mounts? I know these are wordy questions I just feel let down in the HP department in this I6... Thanks Brett

Jul 4, 2001 | 01:04 PM

spshultz

Senior User

Joined: Jun 2001

Posts: 107

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From: Pater, Maine

Rebuild Engine!!!!!

As I am finding out, it's not the HP of these engines but the torque or grunt. This is my first I6 and I was surprised at how slow it seems. I've never driven one before so I have nothing to compare it to. I was attributing it to maybe some problem like timing, transmission, back brakes or bad sensor somewhere but I still haven't checked compression and so far everything is checking out ok.

I would assume that these engines weren't made to be real fast but to be a work horse. Everyone says to wake them up you need to let them breathe. Uncork 'em I guess. But as a true stock motor I guess they really aren't "fast".

Just my .02

Jul 4, 2001 | 02:10 PM

billyb

Posting Guru

Joined: Apr 2000

Posts: 1,069

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Rebuild Engine!!!!!

fracster
if you really want to go, get a 460. but, first see what axle ratio your actually running. this makes a huge difference in "quickness" of the truck.
if you have 3.08, it will feel sluggish off the line, but will run at more comfortable rpm on highway. if you have 4.11 gears, it will accelerate better, but will turn higher rpm's on highway, which leads to less mpg in fuel, and more wear and tear.

Jul 4, 2001 | 02:17 PM

Fracster

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Joined: Jun 2001

Posts: 48

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From: Spokane

Rebuild Engine!!!!!

I think i'll do just that "uncork" If I let her breathe maybe she will give something back

Thanks Brett

Jul 4, 2001 | 02:25 PM

Fracster

Freshman User

Joined: Jun 2001

Posts: 48

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From: Spokane

Rebuild Engine!!!!!

You suggested a 460 to make her go, Will the suspension support it? I have a lead on a 390 engine, is this a good motor and how does she fair? I want to give this(I6) a chance but i think she lacks enough HP to drag this ole girl..... My dad has a 351 clevland rebuilt in the garage Hmmmmm

Oh I think I was dreaming for a minute..... Anyhow I love this new hobby and i wake up thinking about my truck, man I'm hooked, does this happen to others on this list ? My wife wakes up next to me and says, let me guess you working on the truck today

... Thanks Brett Tampa Florida.

Jul 5, 2001 | 02:15 PM

DrFord

More Turbo

Joined: Jun 2001

Posts: 572

Likes: 1

Rebuild Engine!!!!!

If you are wanting to drag this truck the 300 is not the way to go. it simply has too long of a stroke. You can't turn it fast enough. same with the 390 long stroke. I have both f theese engines and they both are much better with low-end torque than horse power. I would look into a 351 probably. or posssibly a 360

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Jul 5, 2001 | 04:42 PM

paulg

Senior User

Joined: Jun 2000

Posts: 464

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Rebuild Engine!!!!!

The 300-6 is a workhorse engine. They produce nothing but torque and some horsepower at upper rpms. Late model EFI 300-6s(93-96) put out 150 horsepower at 3400rpms and 260ft\lbs of torque at 2000rpms. This is not a racing engine! It's made for low rpm work. Right now I have the 300-6 with EFI and it puts out 300ft\lbs torque at 2000rpms at 200 horsepower at 3500rpm. It well haul some as on take off but after I get into 5th gear it peaks out. I can still accelerate on the highway but nothing like a engine powered for upper rpms. To give you an idea of the power I have in this engine, I towed a friends F-350 duallie from Albuquerque, NM to Santa Fe, NM in approximately 1 hour at this is going up hill to higher elevation. Bent the hell out of my rear bumper and the M5OD tranny I have was running pretty warm.

However I have really massaged this engine and I have installed 4.10s. Can't go really fast without high rpms but man will my truck damn near haul anything and crawl anywhere. Then I also made my truck into a work truck, that is what this engine is made to do.

1994 Ford F150
300-6
Highly Modified and more to come!