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Click on image for the lowdown. 
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| | | Forums66 Topics128,052 Posts1,055,740 Members48,426 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Mar 2009 Posts: 208 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2009 Posts: 208 | I had an old ford engine that did this - it was the cam bearings - the previous owner thought you only changed the oil when you changed the tires & junked the engine.
When the oil is cold the viscosity is up (thick) so you get good oil pressure - when it gets hot it gets thinner so you lose it.
I sure hope it was your filter - otherwise it is a rebuild. | | |
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