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Re: Lifter recommendation [message #371218 is a reply to message #370958] Tue, 21 March 2023 21:53 Go to previous messageGo to previous message
Larry is currently offline  Larry   United States
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
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Senior Member
Back in early January of 2023 Idid a post entitled "Lifter recommendation" and wanted to let those interested (especially Carl Stouffer ) what happened.

Here is the post:

I will be replacing the lifters in a 2003 6L Chevy Suburban engine with almost 300K miles. What is a recommended brand name of lifter that I should get for lifter replacement in this engine?
Thanks all.....

Larry
78 Royale w/500 Caddy
Menomonie, WI.

Here is Carls response.

Larry,

I have a 2006 C-20 HD work truck with the 6.0 engine in it. Some time back, this truck (with just under 200,000 miles on the clock) was doing the same thing you are describing. Along with the lifter clattering at startup, it also had somewhat low oil pressure, which got better as it warmed up.

The initial diagnosis was that it maybe needed a new oil pump, but my mechanic fiend wanted to try something else first. He said his previous experience with this same issue showed that the oil pump was generally okay but he theorized that the problem was the O-ring seal at the oil pickup. His thinking was that it was leaking when it was cold and as it warmed up, it would swell just enough to seal up.

Since the oil pan is easy to access on this truck, he wanted to try just changing that O-ring instead of doing the much more involved, and expensive, oil pump job. I was willing to take a chance on it and he dropped the pan and changed out the o-ring. That immediately fixed the problem. The truck has good oil pressure and NO lifter noise right from a cold startup and runs like new.

Chances are you are experiencing the same problem and a simple O-ring change might be the fix.

Carl Stouffer '75 ex Palm Beach Tucson, AZ


As a result of Carls response, researching the "O" ring change I found this to be a very common problem with high milage LS GM engines. I bought the pan gasket, "O" ring, and Oil cooler gasket, and spent two days dropping pan and Oil pick-up tube to find that the O ring had hardened up, and shrunk in size. Replaced the O ring and put it back together. Oil pressure has increased from around 35psi at a hot run, to 60psi at a hot run. No start-up lifter clatter, and no lifter clatter after running on the highway for 30 minutes or so. Oil pressure is now steady instead of varying from 20-40psi at random. Anyway, THANKS CARL STOUFFER. Saved me a lot of trouble and now potential for reaching 400K miles.

Larry Smile
78 Royale w/500 Caddy
Menomonie, WI.

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