1978 chevy 350 issue

[1982K20]

I have a 1978 c10 350 on the stand to put into my 82 k20. Motor had not ran in a few years. Got it cleaned up and spun it over the other day. Oil pressure gauge read about 35psi with a remote starter button. While it was spinning I noticed #6 intake and exhaust valves were not opening very much and the oil flow to each was not consistent. I kept tightening the nuts a 1/4 turn at a time but the rocker arms continued to loosen again after spinning it over a bit longer. What are the odds that I have two collapsed lifters on the same cylinder, or as I fear, two worn out cam lobes?

 

[NickTransmissions]

I have a 1978 c10 350 on the stand to put into my 82 k20. Motor had not ran in a few years. Got it cleaned up and spun it over the other day. Oil pressure gauge read about 35psi with a remote starter button. While it was spinning I noticed #6 intake and exhaust valves were not opening very much and the oil flow to each was not consistent. I kept tightening the nuts a 1/4 turn at a time but the rocker arms continued to loosen again after spinning it over a bit longer. What are the odds that I have two collapsed lifters on the same cylinder, or as I fear, two worn out cam lobes?

Take the rocker arms, push rods and lifters out and inspect the cam lobes to see if they're wiped. You can also inspect the lifters, push rods and rockers at this time as well. Do it now while it's still on the stand and easy to work on...Let us know what you find.

 

[fast 99]

above or lifters that have bleed off or worn out internally. Sometimes takes while to get all the air out of lifters even with engine at idle. Not just cranking.