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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!
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| | | | Joined: Mar 2010 Posts: 10,270 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,270 | With a cold engine, the coolant level only needs to be at a level high enough to cover the tubes.
I recommend that you remove the radiator cap while the engine is cold. Start with the coolant level no more than 1 inch above the tubes, then run the engine in the driveway until it fully warmed up. You should see the coolant noticeably rise once the engine reaches operating temperature.
Put the cap back on and drive the truck like there is nothing wrong with it.
With all of the tests which you have done so far, I don't think that there is.
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
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