is it normal for the TB and UIM to be black and oily inside?
#1
is it normal for the TB and UIM to be black and oily inside?
We are tearing down the long block since nothing is making sense. While pressure checking the UIM/TB in isolation, I noticed the inside of both is coated with black oily substance. almost like a thin coat of grease with graphite mixed in.
Is this normal?
#2
rotary tech
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never seen that before i know the manifold will be oily from the oil injectors but a thin coat of a greasy substance.. i have know clue. that's the only thing i can think of that would make the manifold oily is the injectors but the throttle body i have no clue on. doesn't sound normal at all though.
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rx8volks
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08-20-15 10:24 PM