Coolant Leak

DOGL

MEMBER
1996 CADILLAC DEVILLE
V8
2WD
AUTOMATIC
200,000 MILES

I have a coolant leak somewhere beside the reservoir but it seems to be coming from the engine. I have flushed, tried stop leak and had the water pump changed. I am not leaking as much, but it still leaks. Is there a hose that runs on the back side? If so how do I change it out?

Wednesday, March 14th, 2018 AT 5:00 PM

2 Replies

HARRY P

MECHANIC
2,295 POSTS

Let's stop guessing and get it diagnosed. There is an air pump that you can borrow from AutoZone/Advance Auto. It is called a cooling system pressure test gauge. You take that, hook it up to your radiator when the engine is cold and not running, and pump it up to 15 psi. Then you look to see where the coolant or air is coming out of. Presto, you have found your problem child. If you need, you can take a picture of wherever the leak is coming from and post it here and we will identify it and get you whatever instructions we can for changing it.

Here is a general how-to guide: https://www.2carpros.com/articles/radiator-pressure-test

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Thursday, March 15th, 2018 AT 3:55 AM

PATENTED_REPAIR_PRO

MECHANIC
1,853 POSTS

Once you find the leak with the pressure tester, this may help you figure out which part it is that needs replaced or a clamp tightened up.
https://goo.gl/YcjPyq
https://goo.gl/zDFafh

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Thursday, March 15th, 2018 AT 8:06 AM