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westgo33 · 10-21-2013, 12:06 PM

I have a strange pulsating/whirling pump like noise that I think is linked to the HVAC system. It is only present when the A/C is off.
At idle or low speed it is a steady pulsing that seems to quicken with acceleration.

Does anyone have any ideas or heard a similar sound?

10-21-2013, 12:06 PM	#1
westgo33 Registered 0 Rep 3 Posts Drives: 08 X5 E70 Join Date: Oct 2013 Location: B.C. Canada iTrader: (0)	'08 4.8i - Pulsing pump noise at idle & low speed I have a strange pulsating/whirling pump like noise that I think is linked to the HVAC system. It is only present when the A/C is off. At idle or low speed it is a steady pulsing that seems to quicken with acceleration. Does anyone have any ideas or heard a similar sound?
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