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I replaced the clutch & rear main seal in my '87 240 (159K miles) a couple weeks ago. (picked up lots of good advice from this board!). The old seal was definitely leaking. Unfortunately I still have a pretty good drip from the bottom of the engine. I figured I didn't get the seal in right and was prepared to pull the tranny again, but now I'm pretty sure the problem is the oil pan gasket. This is based on:
- the weep hole at the base of the bell housing/transmission is dry.
- I pulled off the transmission support bracket (bottom of bell housing) and the seal, flywheel, etc look clean and dry.
- the transmission side of the support bracket is dry, the engine side has oil on it.
- I cleaned everything off, watched a while, and it started to drip from the corner of the oil pan.
So I'm gonna replace the oil pan gasket. Couple questions about that:
1. The Bentley manual says to lift the engine with supports on the front and the back of the engine. I plan to make a jig like the one in the FAQ for lifting the engine - do I need to make 2? If I use one should I connect it to the front or the back lift point?
2. Other things to do at the same time
- replace motor mounts
- Fix up oil pump? I don't have an oil pressure gauge so I don't know what the pump is doing, but based on the FAQ I'm thinking I'll replace the pressure relief spring & o-rings.
Does the diagnosis sound right (oil pan gasket) or should I look for another source? Anything else I should do during this job? In the FAQ Dick Riess says he replaced the rod bearings while the oil pan was off. That worth doing?
OBTW, I checked the flame trap system, it is clear. A magnahelic pressure gauge on the oil dipstick tube measures a small vacuum.
Thanks for the help,
Terry
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