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Click on image for the lowdown. 
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| | | Forums66 Topics128,077 Posts1,056,032 Members48,433 | | 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: Jul 2018 Posts: 270 'Bolter | | 'Bolter Joined: Jul 2018 Posts: 270 | Modern radiator caps have two seals, the blow off tube is located above the lower seal and inside the space between the two seals, allowing the expanding coolant to flow out to a tank.
When things cool down, a check valve opens and allows the coolant to get sucked back into the system.
~Charley 1954 Chevy 3100 with 235“Bud”Follow along in the DITY1963 Chevy half ton stepside short box 230 1954 GMC 3 ton 302 And several more Chevy camper and work trucks 1979 1987 1996 | | |
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