Quote:
Originally Posted by sedecrem
I have been wondering if it would not be better to try to fix the engine that is now in the 300SD. With the excellent compression in #s 1,2,4 and decent compression in #5 I am thinking the engine might have been rebuilt or be a replacement being as there is 290k on the car. If I pulled the head and found the bad compression in 3 is due to cracked rings maybe I could replace the rings and end up with a good engine in the car without pulling the engine, switching the transmission parts and engine mounts and putting the 300D engine in there.
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All conjecture at this point.
If you want to take a flier on the existing engine, you've got to pull the head and see what you have. You might have a bad valve..........simple fix. It might be a cracked ring.........more difficult fix.........or it might be a scored cylinder wall..........very difficult fix.
So, until the head comes off, it's difficult to provide a firm suggestion.