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I have 2001 chevy pickup 2wd 6 cylinder 4.3engine I have A

Sent to Chevy Experts December 20 2008 at 11:27 PM
   

I have 2001 chevy pickup 2wd 6 cylinder 4.3engine I have A knocking noise on the right side not low on oil this noise gose away after it worm up sounds like lifters the truck has 63000 miles on it . it is not always there when i start it in the morning. then after the truck sits for thee or four hr.its there and can get a little loud

 

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2001 Chevrolet sylverado 4.3

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I took it to a shop thay said it was a bad oring on the oil pump thay said i was getting air mixing my oil that was not the problem also had a coolent leak at the manifold thay replased the gasket it was a small leak sound like the noise is coming from the lifters

Customer (name blocked for privacy)
Status:  Closed   Value:  $15
Answer
December 20 2008 at 11:43 PM (16 minutes and 5 seconds later)
         
Hi there. You are at the beginning stages of intake gasket failure. What is happenning is small amounts of coolant is getting into the lifters. To prove it drain the oil leave the drain plug out and pressure test the cooling system to 15psi for about an hour and you will see coolant drip from the oil pan drain hole.

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Clayso -- ASE Certified Technician -- 100% Positive Feedback on 36 Chevy Accepts
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December 20 2008 at 11:53 PM (9 minutes and 33 seconds later)
         

thay replaced the intake manifold gasket at the shop would i still have this problem

Customer (name blocked for privacy)
Answer
December 21 2008 at 12:06 AM (13 minutes and 5 seconds later)
         
ACCEPTEDCheck Mark
Hi there. The latter part of your post is now visible to me, as it was not the first time I viewed your post. Yes the coolant that leaked into the oil system has damaged the lifters, I did not know you had already replaced the intake gaskets. I did this same job last week and I was smart enough to replace the lifters when I had the engine apart, I also read about this problem in a forum while diagnosis's the truck I was working on.

I love fixing automobiles and helping customers like yourself, if I have helped please click the Accept button, positive feedback lets my bosses know that I am doing a good job. Thank You.
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Clayso -- ASE Certified Technician -- 100% Positive Feedback on 36 Chevy Accepts
30 years experience full service, all makes and models. I fix cars.
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