07 grand prix water issues


Asked by Aug 15, 2012 at 12:30 AM about the 2007 Pontiac Grand Prix Base

Question type: Maintenance & Repair

Antifreeze is leaking replaced water pump, still leaks and overheats.

6 Answers


where are the leaks? is it a AC/Delco pump? you should get a GM stock pump. use permatex sealant around the gasket too.


it could be the intake manifold or the timing chain cover area too.. check the source.


It's a Oreillys pump of some sort. And the leak is low and behind the belt area. Kinda flows over the power steering pump.

1 of 1 people found this helpful.

heater core hoses leak? check them; hoses lead to firewall..


Mine was leaking after my water pump and before. Turned out the L shaped plastic pieces that go into the water pump were cracked. They are made of plastic. I have a 2006 Pontiac Grand Prix.

2 of 2 people found this helpful.

the small plastic piece is called coolant bypass tube, usually just a press in fit with o rings on each end common issue on all series 1 2 and 3 engines

6 of 6 people found this helpful.

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