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09-10-2021, 03:13 PM | #1 |
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Help! White smoke and rough idle. Not sure what the problem is
Car was doing fine all month, just went to get gas and run an errand and all of a sudden it almost felt/sounded like I was having misfires. Throttle felt sluggish, I happened to look up at the rear view mirror and saw white smoke while I was driving home. Didn't get any errors or drivetrain malfunctions (yet). Car has been on a BM3 Stage 2 93 Multimap tune for a while. However I was checking through Bimmerlink and found a 20A201 error a few days ago. That popped up twice, not sure if that has anything to do with the current issue. Opened the hood and everything seemed to be shaking a lot more than usual intermittently.
Attached are links to videos from 20 minutes ago when I was trying to get the car home: Last video is a shot of the IC reservoir, couldn't clearly see the markings so please advise if coolant level looks low. In the video the coolant seems to be sitting barely at the base of the yellow indicator. Thank you guys in advance |
09-10-2021, 04:49 PM | #2 |
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Cant speak to the white smoke.
However your coolant should be covering the yellow puck up to the point of the crescent arc. The arc should be sticking out of the coolant.
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TC Kline coilovers and camber plates, Bimmerworld TA5R 18" 10.5, RE71RS 295, monoball thrustarms, SPL toe arms, Powerflex diff bushings/bracket, AP Racing 9660, PFC 08, Spiegler brake lines, AA midpipe, VTT crankhub, VRSF charge/j pipe, Turner tray, BM3 CS Youtube: Driver407 |
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09-10-2021, 07:21 PM | #3 |
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09-10-2021, 09:55 PM | #4 |
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I use the oem blue BMW.
60% distilled and 40% blue mixed.
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'16 F80 M3 DCT
TC Kline coilovers and camber plates, Bimmerworld TA5R 18" 10.5, RE71RS 295, monoball thrustarms, SPL toe arms, Powerflex diff bushings/bracket, AP Racing 9660, PFC 08, Spiegler brake lines, AA midpipe, VTT crankhub, VRSF charge/j pipe, Turner tray, BM3 CS Youtube: Driver407 |
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09-11-2021, 08:13 PM | #5 |
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To top off a res you should use distilled water. For the TMIC circuit you can use a little plain bottled water, just not mineral water.
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09-12-2021, 05:07 AM | #6 |
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Same thing happened to me and plenty others. Its your top mount intercooler leaking coolant internally into the intake manifold (engine) replace it with a aftermarket one and you'll be all set. You're getting white smoked because you're burning coolant
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09-12-2021, 11:17 AM | #7 | |
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Quote:
OP: If it's your top mount you want to also replace the plugs and definitely change the oil after replacing the cooler.
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09-12-2021, 11:29 AM | #8 | ||
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Quote:
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09-12-2021, 01:51 PM | #9 |
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Heya,
That "smoke" looks like steam. So burning coolant seems to make sense. josh |
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