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  #451  
Old 11-30-2018, 06:04 AM
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It seems nowadays we battle more and more with diagnosing bad “new” replacement parts. Its really starting to get frustrating.
 
  #452  
Old 12-04-2018, 02:08 PM
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So... I had a chance to tear into the motor this weekend. It's been a crazy month and a bit for me. I don't have photos because I have a new phone and no cable to connect it to the computer.

In brief, I tore apart the entire top end. I took the time to yank the valves for cylinder #1 on both exhaust and intake. Yanked those springs as well now that they're broken in. I pulled all the lifters, and I squeezed all of the old oil out of them at the shop that rebuilt the motor - they're working just fine. The oil that came out of them had some dark streaks, but that's to be expected since the oil from the break-in period was quite dark after the first 200 kms on the motor.

So here we are... lifters are all functioning. Fresh gaskets in every nook and cranny. The Right Stuff used at the china walls this time. Permatex High Tack used on BOTH sides of the Fel-pro 1240 intake gaskets. I even made some dowels out of 5/16" bolts to help set the intake down on the heads evenly.

I even took the time to repaint a couple of things that got cooked after overheating the motor those couple of times.... it was a very long, hard and arduous weekend, but everything seems to have gone together quite nicely.

The last piece of the puzzle is to actually fire up the darn thing and check it over for timing, vacuum, and tune the carb a lot better. Holy cow is this thing still running RICH! I seriously need to invest in an A/F ratio gauge...

So... Here are my measurements for the valves, and springs...

Intake Valve - stamped P 3082 HD
Valve Height = 5.240" - 5.245" (approximate!!! This was a very difficult measurement to get and I used a set of digital calipers, so take it for what it is).
Spring height (uncompressed) = 2.247"
Spring shim = 0.056"
Height from retainer to head = 1.865"

Exhaust Valve - not stamped
Valve height = 5.050"
Spring height (uncompressed) = 2.245"
Spring shim = NO SHIM
Height from retainer to head = 1.815"

So there you have it. I yanked the heads and got some measurements. Now tell me I don't have to change anything LOL.

It's already all back together, so it wouldn't be coming apart until the spring anyways.... won't matter how much you guys entice me and say "something's wrong" LOL.

I hope to fire this thing up on Wednesday. We'll see how this evening goes for my prior arrangements. Fingers crossed I have zero vacuum leaks now...

EDIT: Thanks for the suggestions on new gaskets for the intake btw. Those Felpro 1240 gaskets are nice and thick! The High Tack will really help keep things in place and keep the fuel with the fuel, and the oil with the oil. No more oily spark plugs (one can hope).
 
  #453  
Old 12-06-2018, 09:14 AM
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So I bolted everything back on the top of the intake last night and fired it up.

She was a bit noisy at first due to the lack of oil in the top-end from having the heads off, but that's to be expected. Once it ran for 2-3 minutes, she was purring. No more clatter. No more noise. No more ticking. It wasn't running smoothly, but I solved that fairly quickly with some carb adjustments.

Hooked up my vacuum gauge and it read 17 inches of mercury and holding steady!
Played with the timing a bit, and settled on 14 degrees for now. Will readjust in the spring.
Leaned the carb out enough to make the motor stumble on each bank, then readjusted so it ran smoothly with no stumbling.... I had the adjustment screws out by 1.5 turns too rich!!! No wonder why the garage stunk to high heaven.
Readjusted the idle for 750-800 rpms.
Stabbed the throttle several times and WOW.... the responsiveness!!!! The vacuum needle jumps to 21 inches, drops to zero, then comes back up to 17 inches and holds steady.

I think it's safe to say that I've solved my issues... it appears they were mostly gasket issues + the lifters being full of break-in oil (and whatever those dark streaks were). Ticking is gone, all the stumbling/noise is gone, and it runs extremely smooth.

It's so quiet now too!!! Just to see if everything was honky dory with the carburetor, I turned the truck off and walked away for 5 minutes. Came back, and fired it up - took less than a full rotation and the truck was purring again.

What a great feeling!!!!! Now I'm singing a happy tune
 
  #454  
Old 12-06-2018, 04:27 PM
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I love it, when it all comes together.
 
  #455  
Old 12-07-2018, 10:00 AM
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power good?
 
  #456  
Old 12-07-2018, 01:25 PM
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Originally Posted by KubotaOrange76 View Post
power good?
You mean the ability for it to take off at the line ??? or??
 
  #457  
Old 12-07-2018, 04:40 PM
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Pretty sure he means overall. Does it run good. Good is very subjective, but were you pleased with the result?
 
  #458  
Old 12-08-2018, 12:59 PM
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Thats all i meant, overall how is the seatofpantsmeter reading?
 
  #459  
Old 12-11-2018, 12:23 PM
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Originally Posted by KubotaOrange76 View Post
Thats all i meant, overall how is the seatofpantsmeter reading?
It's reading really well to be honest. I've driven a couple of my uncles around town now and they were pretty impressed with how a big heavy truck can just take off and handle like mine does (they're all Mopar muscle car enthusiasts, so I take it as a compliment coming from them).

I do have some thoughts on my stock tired torque converter and not having a limited slip diff in the rear, but those are future upgrades I guess

As of right now, it's got LOTS of power down low and you can certainly feel it when you romp on it. It's a single tire fire, but she gets going really quick from a stop. I won't be driving it much in the winter because these heavy old trucks don't stop so well on black ice... and I don't want to wreck my last 8 years of hard work.

However, spring time is a different story
 
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