Leaking radiator

Asked by Jul 27, 2014 at 03:14 AM about the 2002 Ford Taurus SES

Question type: Maintenance & Repair

It looks like it is coming out through
the radiator, but not all the time! Could
that be from a bad thermostat?

1 Answer

148,705

No. The thermostat will not cause the radiator to leak, unless a stuck thermostat causes overheating and the over-pressure will come out the path of least resistance, preferably out the cap in to the overflow tank when the pressure compresses the spring on the cap. Buy/borrow/rent/steal (just kidding on that one) a pressure tester that you put on in place of the cap, fill radiator then pump up with air until you see where leak is. Do this with engine cold.

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