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Re: Plenum Discoloration (archive)
[ Follow Ups ] [ 8-series (E31) Message Board ] [ Msg. Board FAQ ]
Posted by Steve C. on February 07, 2000 at 13:46:34:

In Reply to: Plenum Discoloration posted by Len Cacioppo on February 07, 2000 at 12:24:11:

Cosmoline. What you see is the preservative sprayed on by the factory to protect the engine during shipment. It's supposed to be removed by the dealer during pre-delivery prep, but most don't bother. Once it "cooks" on, it's virtually impossible to remove. I've tried everything - solvents, mineral spirits, you name it, none of them work.

If you ever need to have your intake gaskets replaced, you could send the manifolds out for bead blasting - which will remove the cosmoline. Short of that, it's a hideous sight lot's of BMW owners have to live with because of lazy dealers.



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