Quote:
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Originally Posted by Rob Pruijt
If the leak is small it will only leak under pressure, that means when the engine is hot. The water will evaporate and/or blown away which makes is nearly impossible to find the leak. The only way is to find a small leak is by using a pressurise tester when the engine is cold, not just cooled down, but really cold. I would not replace the radiator if the car is not overheating and you are not sure if it is leaking.
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Well I got the Autozone pressure tester and hooked it up when the engine was off but warm. It showed a very slow leak, like 1lb of pressure after 3 minutes with no visable water leak. I then started the engine and warmed it to 85 degrees with the tester on and there was no change in pressure. I checked the oil and tranny dipsticks and there was no foaming or bubbles. Could this pressure and fluid lost be attributed to the water resevoir cap? Will the results differ if I test on a cold engine? I'm perplexed. ''Btw, the head gasket is leaking some oil and I add a half quart every 2K miles.
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