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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Black water out of exhaust



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      02-04-2013, 01:23 PM   #1
E92LNGCGY
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Black water out of exhaust

I parked my 335 (N54) for a few months during the winter. I do start it occasionally but when I started it yesterday I noticed a lot of black water coming out of the exhaust. I assume it is most likely carbo build up. Is this normal? Should I be worried about engine problems?

The car has no major mods except stage 2 tune and intake.
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      02-04-2013, 01:58 PM   #2
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its built up water thats been sitting on the exhaust..THis is caused by turning on the engine and not moving it, but letting it idle. The black color is the carbon thats being soaked by the water which turns the water collected from the condensation in a black sooty liquid.
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      02-04-2013, 02:16 PM   #3
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Thanks. I shouldn't be concerned about it?
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      02-04-2013, 02:27 PM   #4
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Do you have catless downpipes?
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      02-04-2013, 02:37 PM   #5
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Nope. Just stage 2 tune and intake.
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      02-05-2013, 11:13 AM   #6
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That is perfectly normal on just about any car, especially turbo cars that run richer than NA cars when under boost.
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      02-05-2013, 11:56 AM   #7
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if there's no snow on the roads up there, take it out and run it from time to time....its better than sitting and idling.
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      02-05-2013, 12:22 PM   #8
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No worries, man.
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      02-05-2013, 01:36 PM   #9
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Thank you all for your responses. I wish I could take it out but there is snow on the ground and I stopped insurance for the winter.
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      02-05-2013, 02:41 PM   #10
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shouldnt be any issue with the black liquid.
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