We recently purchased a 69 Fastback. It has a 1725 engine. After operating long enough to bring the temperature gauge into the normal range, it leaks 6-8 oz of oil out of the rear main when the engine is stopped. Changing oil filters stopped the excessive oil leak. The difference - the old oil filter has a drainback valve, the new one does not.
I have no idea why this is happening. I am posting to see how common this problem might be and if anyone knows why the drainback valve would cause it. BTW the old filter is a PH253 (not branded) the new one is a Wix 51410.
Bill
I have no idea why this is happening. I am posting to see how common this problem might be and if anyone knows why the drainback valve would cause it. BTW the old filter is a PH253 (not branded) the new one is a Wix 51410.
Bill