Engine Mechanical problem
1989 Mercedes Benz 300e 6 cyl Two Wheel Drive Automatic 164516 miles
this vehicle has a rear main leak and oil pushing past the oil fill cap. Someone else replaced the front cover and oil pan to remedy those leaks. 3 rear seals have been installed by another tech at this shop to no avail. I should note that it was only a seep at the rear main before replacement. Crankshaft run out is less than.005 of an inch. This vehicle builds up to 18psi of pressure in the crankcase on moderate to heavy acceleration and remains in a pressure situation until the throttle is released at which point it returns to a vacuum of 16 inches. Pcv has been inspected and is clear, it also has vacuum to it. Leak down tests show less than 5%, compression tests are good at 190psi cranking. The vehicle runs fine. Any ideas would be great. Obviously I am missing something.
thank you. Craig
Tuesday, April 13th, 2010 AT 2:45 PM