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1994 Mitsubishi Diamante Luxury 4dr Wagon

1994 Mitsubishi Diamante
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November 28, 2012, 1:14 pm

Greg A
 

Question: how do I know if my thermistate is shot and not the waterpump

Car is over heating small amount antifreeze leaking fromright side of engine


December 1, 2012, 10:59 am

Ron W
Expert Mechanic

To find the leak you’ll need to perform a coolant system pressure test. You need a special pressure tester that fits on your coolant cap to do this test. Even a small leak usually will show very quickly. Most shops have one and shouldn’t charge very much to do it for you.

You need to fix the leak and go from there. Then you can see what is causing the overheat. And if it overheats immediately (1 to 2 minutes) after start up, its a good change the t-stat is the problem. If it takes longer, it is more likely something else.


As a side note, NEVER open the cooling system when it's hot, as hot coolant can cause severe burns.


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