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940 rear main seal replacement. What did I do wrong? 900 1993

posted by  Steve on  Thu Jun 9 18:17 CST 2005
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last visit: Fri Oct 24 07:16 CST 2014
[RELATED]

The new gray Viton seals are more difficult to install: the lips are stiffer and can end up not seating. I have made an installer using the seal carrier, on which it is shipped, by filing away the inner lip so the plastic piece fits on the crankshaft. In the process, the horizontal bands end up ensuring the seal lips do not curl under as the seal is installed. An alternative is to run a curved piece of plastic sheet around the crank, pushing the seal lips into place as you rotate the plastic around the crank. Make absolutely sure the seal lips are in place before you button this one up. And look elsewhere for a leak: the turbo oil drain line o-ring is an all-time winner in the leak category, as is the distributor o-ring seal.






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