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Click on image for the lowdown. 
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| | | Forums66 Topics128,043 Posts1,055,605 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!
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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: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | I have seen many umbrella seals crack rendering them useless.
Stock O ring seals seldom fail if installed correctly( I always vacuum test them once installed).
I have only seen one engine where the O rings failed. That engine had sat for many years and the seals did dry out and crack.
See the USA in your vintage Chevrolet! My Blog | | |
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