| Re: Lifter recommendation [message #370966 is a reply to message #370964] |
Fri, 06 January 2023 11:13   |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
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Larry wrote on Thu, 05 January 2023 21:01Matt,
It is noisy on cold start-up. Clattering goes away in about a minute of running. Oil is Mobil 1 0W40. Then starts clattering again when running down the freeway at 2100 rpm for 10-15 minutes. Clatter eventually goes away when off the freeway in 30-40mph traffic. Oil pressure runs at 30-35 cold start, and gains to 40 at hwy speeds. The warmer the engine gets, seems to gain 2-3lbs. Son-in law has made regular 3K oil changes since new with only Mobil 1 oils. I don't think it is a gummed up issue. Seems like lifters that are just worn out. JWIT. Thanks for the suggestion.
Larry,
What you have is exactly what engine engineering has called "Morning Sickness".
With SILs attention, I am surprised that it has happened. But quite honestly, the available sample of engines with that sort of service length has only become available recently. Personally, with Mobil 1 and that sort of service interval, the lash adjusters should not be either worn out or gummed up. So, I guess I am going to have to load that one in my sample file and see if I can think anything.
I am with you about not breaking open a good running 300K motor.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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