Noisy Run On Coolant Pump

[chrisbrace]

Hi all,

 

Helpful forum this, I see the noise I am worried about has been identified here as the coolant run-on pump that flows coolant for about 15 mins after the engine stops.

 

My question is, this noise seems louder that it used to be and more pulsing in nature (about 2Hz) rather than constant. Is this a sign of impending failure and if so is it a problem? I can't imagine it is as I dont usually stop with a red hot engine, not being an austrian., but i wondered if it lights the MIL lamp or anything if it fails?

 

Regards

Chris

[Guest T120]

Perhaps its to do with circulating the very hot water till it cools down to a normal temp.

 

The Mil lamp might be initiated if there is a flow sensor in the cooling water pipes, or if its clever enough to see the current rise to the pump if the pump seizes or lack of current if the motor windings open circuit.