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20w - 50 oil to slow rear main leak 850

The procedure I described would still apply. The turbo just adds another possible source of oil leaks into the air supply.

I haven't had any problems with my 855t's oil separator (yet) so I don't have an experience to share with you about it. I suppose it's possible you have a clogged crank breather (oil separator) causing high crankcase pressure and causing your rear seal leak and smoke, but your description of it happening at idle doesn't jive with that.

Wish I could be of more help.



--
Erwin in Memphis, '88 745t 193,000 miles, '95 855t 96,000 miles






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