Troubleshoot or Just Pull It?

[T56MaxTorq]

I have a rather odd dilemma. So I’ve been plagued with 2 bad thrust bearing failures. The last one was minor so I just changed the bearings with the crank-in and changed my torque converter. I suspected it was ballooning or the torque converter pressures were too high. I have the engine in and running but I have a dead cylinder. Intake valve seat took some damage. I dropped a washer in the intake during the bearing change and turned the crank over by hand and wrecked it just right.

So I haven’t had much run time on the engine but I was really wanting to check my transmission and converter pressures before I pull the intake and head. Is there any chance of further damaging anything else by running the engine with a load to do these transmission checks? I have MPFI so I can just drop fuel to the dead cylinder so it wont wash out rings. I really just need to run up the engine to 2500 in gear.

 

[nm9stheham]

Well if the washer is not in there any more, then the only thing that could be a problem IMHO is if the vale is bent and somehow kisses a pistons due to that. But if it is running now, then it seems OK to go to 2500 RPM.

 

[T56MaxTorq]

Washer was removed after realizing it interfered while turning over by hand when doing the bearings.

I borrowed a scope tonight and sure enough, a large burr is on the seat. Valve didn’t appear to be damaged. I don’t think it is bent either. I can spin the valve in the guide without interference. Cylinder leaked rate was 95%.

I’ll run it tomorrow and check transmission pressures.

 

[nm9stheham]

A better ending than my missing bolt down the intake that hid behind a valve stem LOL