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Old 01-31-2011, 07:22 PM
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Re: Need photo of engine to diagnose

Quote:
Originally Posted by Tinkerin_wit_tools View Post
Ok, it is on the bottom, driver's side. I have had a pressure test in the past and I seriously doubt that I would need one. All the necessary parts of the cooling system have been replaced within the past year and it wouldn't be the water pump, since that is directly in the middle and has the fan and clutch attached to the front of it. I guess I will have to contact the GM dealer for more information.
How much coolant does it seem to be leaking? Hardly any? A cup? A quart? How often do you need to add to top off? If you have a leak, I strongly recommend another Pressure test to pin point it. Slow leaks are the worst. The pressure tester is the best way.

Could you be seeing residual coolant?

Another possibility is the weeper hole in the water pump, it may be hard to see but if it is leaking into the bell shaped pulley, it could be slinging coolant. The pressure tester will force coolant out through the weeper hole and make it visible.
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