Quote:
Originally Posted by srmmmm
Need to find that leak first. My 3.0 starts to pressurize the cooling system as soon as the temp needle is at 10 o'clock. Once the leak is corrected, I'd look to a mis-behaving thermostat. I've had an OEM replacement go bad a year after it was installed.
2002 X5 3.0 289,600 miles
2004 325i 120,000 miles
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im leaning to a malfunctioning thermostat also but since the majority of the cooling system is new i rather throw a new pump and thermostat in their also but while im looking at thiings i was just trying to see if any one had a similar situation and who knows it might be some thing else then those 2 things.
oh the leak is coming from the cap but only after hard driving but what concerns me is the deformation of the upper hose it looks like it expands about half inch more and ive never seen it like that so i know there is excessive pressure build up