Bimmerfest - BMW Forums - View Single Post - Entire cooling system overhaul, 2001 X5 still overheating, cools when heater is on
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Old 04-26-2013, 10:06 AM
HPIA4v2 HPIA4v2 is offline
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Location: washington
Join Date: Mar 2006
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Mein Auto: E60, E71, E92
You either have bad thermostat (not fully open when you are at freeway speed) or some more air in the systems that need to be purged.
The noise could be new belt being tight (not broken in) or old tensioner, usually people replace tensioner when replacing belt.
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