Hi all,
I have a 92' 940 Turbo and it has been leaking oil. I recently had it checked by a mechanic and he verified that the oil return hose was bad on it and needed to be replaced.
I would like to do the replacement myself. Can the turbo's oil return hose & gasket be replaced without taking it into a shop? I have enough tools in my garage; is this job too big/extensive to do in my own garage?
Thanks for the prior suggestions on my previous related post. I would greatly appreciate any further help you all can provide.
Sincerely,

Josh

As Steve wrote, go to the 700/900 FAQ. I have done this several times. On your car the turbo oil drain pipe is bolted to the turbo with two metric allen head bolts. They might be 6mm, but I am not sure. You will have to disconnect the wastegate actuator rod to push the tube away from the engine and remove. Then just replace the o-ring at the bottomm and the gasket at the top. One of our cars had a leak from the turbo drain line last year. The tube was cracked at the lower bend, so remember to take a close look at the drain tube fro cracks at the bends.

I had the same problem on our 745 Turbo and I was able to stop the leak. It has been over a year and it still is fine.

You must work from under the car so be careful to safely raise the car and support it on jackstands. Use a solvent (I used lacquer thinner: and be aware of the possibility of fumes and fire potential) to remove all traces of oil on the end of the pipe, and the block surrounding the opening. Use a rag and solvent on a thin screwdriver to clean the area as deep as possible. Then use Q-tips with solvent to get every last bit of oil. Finally wipe the pipe and block surface again.

Now use a high grade of silicone to seal the gap between the pipe and the block. Force small amounts in until the gap is filled all the way around. At this point add more silicone over top of the gap you just filled. Work this additional layer out onto the pipe as well as out on the block. I would say 3/4 inch would not be too much. Then fill the space that would exist if you drew a diagonal line from the outer edge of the silcone on the pipe to the outer edge of the silcone on the block (hope this makes sense to you..) Think of it as welding with silicone! Let this dry for at least overnight and preferably 24 hours. It is a lot easier than replacing the O-ring (been there, too)

Randy

You must mean the oil return pipe from the turbo, which tends to leak at the block o-ring connection. See the 700/900 FAQ for information about how to do this and what pitfalls await. It requires some contortions under the car.