5.7 vortec rpm "slip"

[lindstromjd]

Originally Posted by speedygonzales

You need to be looking for your "missing" push rod. During an oil change, try using something like a hanger through the drain hole to see if you hear something sliding around the bottom of the pan. You may have bigger potential problems than just a misfire.

BTW the actual method for tightening rockers is to use your fingers to roll a dry pushrod back and forth while tightening the nut until you feel drag on the DRY push rod. Once you have drag, you tighten the nut 1/2 turn further.

Has always worked for me for many many years. Doesn't make the "running" engine oil mess either.

I had it at the shop after I replaced it, and they had the intake manifold off and didn't mention anything about finding pieces of a pushrod. I have no clue what happened to it.

I know that method, but I've always heard that it was a "get it close" method and then once the engine is running, back them off until they start to chatter, and tighten them back down again until they're quiet.