The Diesel Garage banner

1 - 2 of 2 Posts

·
Registered
Joined
·
6 Posts
Discussion Starter #1
Hello to all. New member, firstish post. I recently bought a 2001 f250 powerstroke crew cab 4x4 with 48,000 miles on the odo and probably 4-5 years worth of idle time in an arctic environment. It was sold to me as needing a new engine however was running well enough to pull itself out of the snow drift it was in and up onto a trailer. I could tell it was missing and the seller told me a shop had said low compression in 2 cylinders. My initial inspection revealed the following problems: cranking time to start excessive (5-6 seconds), idle rough, white smoke all the time (cold, hot, idle, accel, etc), blow by is minimal, no CEL.
Once I got it home I began to dive into the truck. Taking the intake off revealed a turbo that has minor leading edge wear. Valve cover removal and rocker arm revealed 2 bent push rods. #7 intake had bent so bad it was off the rocker, #2 exhaust pushrod was very bent but still partially functioning. Both of those explain the low compression. Injector removal shows 4 reman injectors and 4 stock injectors. The stock injectors had bad bottom o-rings. Some of the reman injectors had old o-ring material lying across the new o-rings. Number 2 and number 4 injector cups were cracked as coolant was present after pulling the injectors. Cracks do not appear to have made it into the fuel gallery as I did not smell any fuel in the coolant.
My conclusions thus far are this: The short block in probably in ok shape based on minimal blow by and good oil pressure unless a piston was damaged in #2 or #7. The heads could still be in good shape except for possible wet stacking causing valve sticking/ bent pushrods. Sticking valves and bent pushrods could have burnt/damaged valves/seats
My plan is to replace the 2 cracked sleeves, replace the injector o-rings, replace the pushrods with a good used set and do a compression test and a leak down test before continuing to tear down the engine or plan repairs.
Any thoughts about my problems, plan, or conclusions?
 

·
Registered
Joined
·
6 Posts
Discussion Starter #2
update:
I shoved the heads in a hot tank for a few hours to clean off the gunk. I found that none of the valves appeared to be seating correctly. I removed all the valves and found that all of them were exhibiting recession. Some had receded so bad they were dangerously sharp along their edge. All of the intake valves had worn substantially more than the exhaust valves. Is this common? That seems odd to me. I have not taken the heads to a machine shop yet to see if they are salvageable as it’s a 100 mile drive each way. I am wondering if all the guides are worn causing the valves to wear like this. Anyone have an idea what could be causing this?
 
1 - 2 of 2 Posts
Top