| Re: Lifter recommendation [message #370969 is a reply to message #370968] |
Sun, 08 January 2023 21:54   |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
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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.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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