White smoke

2487sam · 01-16-2026, 02:13 PM

Hi gents

I’ve had quite a bit of white smoke out of the exhausts recently. Checked the coolant which measured low and probably had to to top up around 1.5L. (Confident it’s not oil)

Charge cooler res level is ok.

Anyone experienced similar issues?

vertea · 01-20-2026, 10:37 PM

Most likely culprit might be a turbo coolant line. All that stuff gets burnt off quite quickly and those coolant lines are known to be pretty bad as time goes on. Less likely (but not impossible) culprit is the head gasket.

01-16-2026, 02:13 PM	#1
2487sam Registered 6 Rep 19 Posts Drives: F82 M4 Join Date: Mar 2025 Location: UK iTrader: (0)	White smoke Hi gents I’ve had quite a bit of white smoke out of the exhausts recently. Checked the coolant which measured low and probably had to to top up around 1.5L. (Confident it’s not oil) Charge cooler res level is ok. Anyone experienced similar issues? Last edited by 2487sam; 01-16-2026 at 02:24 PM..
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01-20-2026, 10:37 PM	#2
vertea Enlisted Member 24 Rep 31 Posts Drives: '18 M4 ZCP, '20 X3 M40i Join Date: Nov 2025 Location: New Jersey iTrader: (0)	Most likely culprit might be a turbo coolant line. All that stuff gets burnt off quite quickly and those coolant lines are known to be pretty bad as time goes on. Less likely (but not impossible) culprit is the head gasket.
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