
Originally Posted by
6670charger
I know this is a bit out of order in the scheme of replies at the top. I've been doing just as suggested by driving the car like I stole it after having changed to 10W-30 part synthetic oil and adding Liqui-Moly lifter cleaner. When I drive the car on the Autobahn for about 7-8 miles at 110mph or so, the engine seems to quiet down at all speeds for about 3 days, but then the lifter clatter starts up again during city driving. Only happens when the engine is warmed up to normal temp. When it's cold, it sounds normal.
I'm taking Bill's suggestion and changing out the gasket for the oil pickup tube in the oil pan tonight to see if the problem might be air getting into the oil causing foaming at warmer temps. I'll post and let everyone know if that solves the problem. If that doesn't solve the problem, I'm open to suggestions.
I have the warm idle lifter noise, only after the oil has about 3,500 miles on it. Looking forward to your results. I would think that changing the oil pan gasket is a bit of a pain on the M50.
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment