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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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| | | | Joined: Jun 2009 Posts: 1,596 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 1,596 | Even with an overflow tank your pressure of your cap shouldn't change. As was mentioned it's so that the coolant that overflows can be sucked back in. The reason you fill the rad right up and use an overflow tank is so that you're utilizing the entire rad the entire time the engine is running, which helps with cooling, believe it or not. | | |
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