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Mod | | | Forums66 Topics128,080 Posts1,055,956 Members48,430 | | 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: Feb 2000 Posts: 5,209 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,209 | In 1939, the valve spring pressures were set at 49 - 56 pounds with valve closed, 121-133 pounds with valve open. It wouldn't take much seat wear to loosen the valve spring, and since they are weak to begin with, I am not surprised you can move them around. | | |
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