GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.

Home » Public Forums » GMCnet » Lifter recommendation
Re: Lifter recommendation [message #370964 is a reply to message #370963] Thu, 05 January 2023 20:01 Go to previous messageGo to previous message
Larry is currently offline  Larry   United States
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma:
Senior Member
Matt Colie wrote on Thu, 05 January 2023 08:56
Larry,
If the lifter is just noisy, it may just be gummed up. That be the case, you might do a change to a lighter weight synthetic for at least one change. It may get in there and make it quiet down a little. Sure is easier than pulling the heads.
Matt
Matt,
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 Smile
78 Royale w/500 Caddy
Menomonie, WI.

[Updated on: Thu, 05 January 2023 20:02]

Report message to a moderator

 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: Valve cover gaskets
Next Topic: GMCSJ Silver City Rally
Goto Forum:
  


Current Time: Sat Jun 29 02:24:58 CDT 2024

Total time taken to generate the page: 0.03612 seconds