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GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 29522
Experience:  GM Grand Master Technician 2007. 14 years experience.
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2004 CHEVROLET TAHOE WITH LIFTER NOISE ISSUES//LIFTERS DO NOT

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2004 CHEVROLET TAHOE WITH LIFTER NOISE ISSUES//LIFTERS DO NOT LOOK LIKE THEY HAVE FAILED

Greetings and Welcome to Just answer.

Was it rattling at times before?

If so then I suspect the oi pressure relief or pump is the issue. The are common and are in the same assembly. This is around the front crank under the front cover.

 

Customer: replied 7 years ago.
The noise only comes in the morning and then the noise disappears//oil pressure is within specs oil pump is fine

IT could be that, or the o-ring for the pick up tube into the oil pump. those o-rings were common for that exact issue.

 

Customer: replied 7 years ago.
would that be the case if the oil pressure is fine and the oil is pumping into the lifters

It sucks air so the pressure is still up, but air in the system will not allow the lifters to work properly.

 

Customer: replied 7 years ago.
what about light contamination to the oil from castech heads?
Customer: replied 7 years ago.
I haven't seen an answer yet to my question above, also would the lifters show damage if they have failed?

Sorry for the delay.

I would not suspect contaminated lifters.

 

Customer: replied 7 years ago.
What would you suspect? Contamination in the oil?

No, I would do the oring first. I ahve done a handful and that was the issue is 90% of them.

 

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