1999 Pontiac Bonneville water pump

Tiny
THOMJOHN
  • MEMBER
  • 1999 PONTIAC BONNEVILLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 180,000 MILES
How do you know the water pump is working, no leaks, no squeeks but I dont see fluid moving in
the radiator. Plus not getting any heat from heater core
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Wednesday, January 28th, 2009 AT 8:34 PM

1 Reply

Tiny
RASMATAZ
  • MEMBER
One way to test for a bad water pump is to squeeze the upper radiator hose when the engine is hot and idling. Careful, because the hose will be HOT! If you do not feel much coolant circulating through the hose when you rev the engine, the pump may be bad. The other cause might be a bad thermostat that is not opening properly (remove and inspect the thermostat), or a clogged radiator.
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Wednesday, January 28th, 2009 AT 8:44 PM

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