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1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

'56 F100 intervention

 
  #16  
Old 07-11-2015, 07:27 AM
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Way cool. I'm a fan of the Y Block, so I am wishing you the best success with getting it fired up!
 
  #17  
Old 07-11-2015, 08:30 AM
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Originally Posted by tinman52 View Post
It hasn't run right for years. He's had several guys work on it, but they couldn't figure it out. He wants me to swap in a Chevy 350 he has.....I'm trying to talk him out of that. Gonna see whats up with the Y block first.
Put a vacuum gauge on it and see what it's pulling at 550 RPM and report back.
 
  #18  
Old 07-11-2015, 03:23 PM
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Originally Posted by tinman52 View Post
The whole truck is fabbed from other parts.....1 ton chassis, Jeep Pu cab, hand made hood, sleeper was cut apart and sized down, etc. A ton of work went in to building it.

I also want to thank everyone for your support and offers to help! It is much appreciated. I will keep you updated.
The semi-semi is cool! (as is the 56), Good luck on getting her going again.
 
  #19  
Old 07-11-2015, 09:03 PM
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Sub'd!!

And I love that semi!! Awesome! I'd drive that everyday!
 
  #20  
Old 07-11-2015, 10:49 PM
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I got the nasty gas out of the tank today and had a peek through the sender hole.....
Not good.....very rusty in the bottom.
Will rig up a temp tank and scare up a battery in the next few days....
Likely need to pull the carb and see what's inside too.
 
  #21  
Old 07-12-2015, 03:16 AM
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Don't know how your friend could have stood for it being untouched for two years! I was climbing the walls when mine was away for 3 months and they didn't do anything to it, except damage it while it was in their workshop.
Good luck with!
 
  #22  
Old 07-13-2015, 12:14 PM
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You are doing a great think for your friend. The world could definitely use more people like you.
 
  #23  
Old 07-22-2015, 08:44 PM
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Little update.........I did a compression test on the Y block today. Most cylinders were 130ish, not too bad. But #7 had none, so I pulled the valve cover to check for stuck open valves. Both are working....not sure if they are sealing. Broken/stuck rings?
Also #1 is blowing back into the intake? Not looking good.....
 
  #24  
Old 07-22-2015, 09:24 PM
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Y-blocks are tough engines, takes a lot to hurt one.

Compression test done with carb held at WOT, all plugs out, 2oz oil in each cylinder and then crank for a while, then check compression? If not, don't worry about low #7 or #1, if it has not run in a while, valves might be not seating and rings not seating.

After you put oil in cylinders and crank it for a while, put shop-air into spark plug holes on #1 and #7 to confirm where that air pressure is going; out carb, out exhaust, or into crankcase.

Even with one really low cylinder, I would start it to see what it runs like. Put Marvel Mystery oil, about 2 oz, into carb ( no gas) and then crank it to start. That oil will burn and also lube valves. If it fires then dies, do it again, then hook up gas line.

Run for a few minutes. Shut off, pull plug on #7 and check compression.

Good luck!
 
  #25  
Old 07-24-2015, 08:40 PM
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After some more checking.......The #7 exhaust valve was tightened down so much it wasn't closing, and the #1 was too loose. Whoever was adjusting the valves was clueless.
Got them all pretty close, will try to fire this thing over the weekend!

I'm a little concerned about the cams condition....some of the adjusters are at their limit....
 
  #26  
Old 07-24-2015, 09:42 PM
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How about some video of the firing?
 
  #27  
Old 07-25-2015, 10:38 AM
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If adjusters are at their limit...... I suspect bent pushrods. Pretty common on old Y-blocks that sit for a long time, valves stick and it bends pushrods.
 
  #28  
Old 07-25-2015, 10:17 PM
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Got the Y block fired up today. Still have a lot of racket from the valve train....gonna pull the push rods and see what's up. I didn't run it very long, the water pump is leaking too.
Now that I can move it under it's own power, I'll get it into the shop and dig a little deeper....
 
  #29  
Old 07-25-2015, 10:48 PM
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I'll bet the rocker shafts are full of crud. Sitting and who knows what maintenance (if any) probably has the engine all sludges up. A couple of oil changes maybe with sea foam and a valve adjustment may quiet down the valve train noise. Pull the valve covers and see what it looks like.
 
  #30  
Old 07-26-2015, 01:37 PM
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Sweet, it's running. Keep the updates coming; pics too if you can. How many years since she moved on her own power?
 

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