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Old 09-07-2012, 08:14 AM
HPIA4v2 HPIA4v2 is offline
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Location: washington
 
Join Date: Mar 2006
Posts: 2,128
Mein Auto: E60, E71, E92
Quote:
Originally Posted by jatwell1 View Post
Is there a way to determine if the pump is bad? Can you hear it run, or feel it viberate when it runs?
turn the ignition on, FOOT OFF THE BRAKE PEDAL, so engine is not running! then press the accelerator for 10-15sec until you hear the water-pump running. Open the reservoir cap to see if coolant is streaming in there. caveat, if the WP is weak this test may be moot.

You also want to check for code using code-reader, at the end if WP is bad just replace the thermostat as well, same amount of labor (thermo is only ~$100).
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