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Old 03-18-2007, 03:04 PM   #1
scruffboy
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Default Overheating (not bhg)

My car was blowing coolant into the overflow tank but I did not want to post about it because I knew everyone would jump to the conclusion that it was a blown head gasket. I did some detective work and found the problem. I had bought an aftermarket radiator cap with one of those e-z release levers. Well that was shot, so the coolant had no place to go but into the overflow. The coolant is still green, the oil is not milky, and now I can go on my merry way.

Scruffboy

P.S. Do not buy those radiator caps with the orange lever, they suck.
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Old 03-18-2007, 06:38 PM   #2
mrnickleye
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Default

Those 'quick release' caps where invented for use on those old cars that did not use the overflow bottles.

The radiators were like ours, in that they had a top tank. But, those cars were designed with BIG tanks (like my '65 Fury), and you leave an inch or 2 or air on top.

As the pressure builds, the air compresses (water does not), and they only over flowed when there was a problem, or, occasionally, when it was "extremely" hot outside.

You could release the pressure safely with the lever because of the air on top.
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