1999 Pontiac Bonneville water pump

1999 PONTIAC BONNEVILLE
180,000 MILES • 6 CYL • FWD • AUTOMATIC
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THOMJOHN
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  • 2 POSTS
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
Jan 28, 2009 at 8:34 PM
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RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
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.
Jan 28, 2009 at 8:44 PM