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I have noticed a dark brown stain coming from the #4 (from the front)exhaust port coming out where the block meets the manifold on my '90 300SE.
I have kept an eye on it and it seems to have gotten a little darker. Would this effect idle or fuel mileage? Is this anything to be concerned about? Thanks,
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Mr. BILL 91 300E 120K 90 300SE 275K (sold) 92 BMW 525iM 120K 90 BMW 525iA 175K 85 300D 175K (sold) 84 300SD 245K (sold) |
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