Risk of ignoring lifter noise?

[VetteMed]

Originally Posted by Pete

I have a question did the noise start after you installed new injectors.
Another question did you buy the injectors from FIC?
You say it varies with temps?

I like to start from cheap to expensive.

I would check spark plugs new or not,i had a brand new spark plug drove me nuts trying to find the noise.
Check coils,wires.

Then move to lifters.
If you know which bank the lifter noise is on i would change all the lifters with new lifters on that bank price is not so bad $15-$20 each X 16 lifters,what i would do in your position is pin the cams like the FSM or post when you get that far and we'll help.
Not such a bad job just go slow and take your time,just make sure it's lifters.

Pete

Pete, thanks for the suggestions. Initially the problem seemed worse when cold; now I'm not so sure. Seems pretty consistent now.

I just put new NGK Iridiums in last week to see if there was any improvement. Plug wires are about 2 years old ACDelco.. Same for coils.


I'll pull the plenum later to check everything.

Injectors are FIC, about a year old now. Something that has bothered me, is how quickly the motor fires after sitting for several hours or days. Everyone says the LT5 needs to crank a bit before actually firing -- which mine does, when warm. Cold, however, it lights off on the first crank of the starter, so I've been wondering if an injector or two are leaking down.

Thanks
Andrew