Lifter noise?

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dart_68

dart_68

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I've got a 360 with a hydraulic roller cam/lifters. It has what sounds to me like a lifter tick. The interesting thing is the sound will eventually fade away. The fading away is NOT related to the engine warming up. Sometime I can make the tick come back if I rev the engine to about 4k. The tick will persist for a bit and eventually fade away as the engine is idling.

Does this sound like a bad lifter or could there be something else going on?

Thanks!
 
How about head to exhaust manifold/header gasket leak? That can sound just like a lifter problem. If so, I highly recommend the REM-FLEX graphite gaskets, problem over.
 
Check oil psi.

But the first thing I think of is whether or not you have the correct preload on the lifters another words are your pushrods too short.
 
MOPAROFFICIAL said:
Check oil psi.

But the first thing I think of is whether or not you have the correct preload on the lifters another words are your pushrods too short.
Click to expand...
Oil PSI is fine (first thing I check). You could be right about the preload though as I believe my pushrods are about 1/16" too short. I have 273 rockers and most of the adjusters are maxed out all the way down.
 
dart_68 said:
Oil PSI is fine (first thing I check). You could be right about the preload though as I believe my pushrods are about 1/16" too short. I have 273 rockers and most of the adjusters are maxed out all the way down.
Click to expand...
If it were only a couple and not so messy...I'd say you could take a rag and while running...push onto the PR side of the rockers to make them quiet as verification.

BUT if you're using the stock style Jam screws you could update to a isky adjuster or crane...and get the length-a longer adjuster.

However you don't want to start throwing the geometry off at the end of The Rocker by having too much adjuster hanging down and fiddling with the acceleration of and lift.. so you might want to just get the right pushrod
 
MOPAROFFICIAL said:
Check oil psi.

But the first thing I think of is whether or not you have the correct preload on the lifters another words are your pushrods too short.
Click to expand...
The preload I did get was 1/2 turn after zero clearance. With HR lifters, would that be enough?
 
It’s more than likely the pushrod itself tapping the head if your pushrods are too short. If you take them out youll see a mark on them.
dart_68 said:
Oil PSI is fine (first thing I check). You could be right about the preload though as I believe my pushrods are about 1/16" too short. I have 273 rockers and most of the adjusters are maxed out all the way down.
Click to expand...
 
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