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Old 01-27-2013, 12:32 PM
H F H F is offline
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Mein Auto: 2005 545i
Originally Posted by bmwoem1 View Post
This issue is also common on the 550, 650, and 750... and they have oil coolers, so I wouldn't blame it on that. I've seen them leak as low as 45k miles.... it depends how hard you drive the car and extended idling periods.
Then prolonged and constant high rpms is the reason for valve stem seal failure ?... So 15.000 mi oil change vescosity loss and higer oil temps hold no blame for premature seal and gasket leaks like on 545,s... isnt that why bmw went back to equipting oil coolers on the 550??
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