Help

Asked by Feb 06, 2017 at 12:12 AM about the 2009 Chevrolet Tahoe LTZ 4WD

Question type: Maintenance & Repair

I have a ticking noise thats there with a cold start
and goes away once it has warmed up. It doesnt
miss and idles fine at all times. It has been using
maybe a quart in between oil changes. 2009 chevy
tahoe 6.0. Took it to the dealer. They told me it
wasnt a ticking noise that it was a knock coming
from the bottom and they needed to tear it down to
find it. They found nothing. No metal in oil or in
filter. Everything was in spec. Now they say its the
oil pump, so I asked it they ran a test on it and they
said no. Friday they ran the test and it was hight 58
at first then went down to 30-40. But are going to
let it set over the weekend and test it again. They
have now quoted me lifters as well but told my
warranty company they found no failers. Im really
confused on what to do. Sounds like they are just
guessing at everything and not really trouble
shooting. What to do?

3 Answers

7,145

Do an oil pressure test with a manual gauge. If it's up in the 60's when cold and drops to 30 after it warms up, you have internal engine wear, like bearings or shaft. New lifters is not going to solve the problem. Oil looses viscosity as it heats up and if there's engine wear, pressure goes down. New pump will not solve this problem either since pump pressure is based on back pressure. You can go to a heavier oil but it will only patch the problem not fix it. To fix it, you need to rebuild the engine. Good luck!!

50,735

How many miles on this Tahoe?

180,000 miles. The noise goes away and all runs fine. The ticking noise is only there when its cold. Would a barring/cam stop making the noise?

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