Issue with Coolant

bmw335d · 07-09-2018, 09:18 AM

Hey Guys,

On my 335d I notice that the coolant level keeps dropping in the expansion tank. I have to keep topping it up every couple of days.

I don't see any visible leaks any where and the car is running perfectly.

What could be the cause.

No fault codes either.

ranthum · 07-09-2018, 10:42 AM

It's either leaking or burning. Leaking is much cheaper. Burning could be EGR cooler if you still have one or head gasket.

335dlci · 07-09-2018, 04:16 PM

Pressure test it. You won't have faults.

Lovvi · 07-12-2018, 11:52 AM

Is your coolant mixed with some kind of oil in your coolant tank?

07-09-2018, 09:18 AM	#1
bmw335d Second Lieutenant 104 Rep 247 Posts Drives: X3 M40i, 335d Join Date: Sep 2010 Location: Toronto, Ontario iTrader: (0)	Issue with Coolant Hey Guys, On my 335d I notice that the coolant level keeps dropping in the expansion tank. I have to keep topping it up every couple of days. I don't see any visible leaks any where and the car is running perfectly. What could be the cause. No fault codes either.
	Appreciate 0 Tweet Quote

07-09-2018, 10:42 AM	#2
ranthum Private First Class 23 Rep 133 Posts Drives: Looking to Buy Join Date: Jan 2015 Location: United States iTrader: (0)	It's either leaking or burning. Leaking is much cheaper. Burning could be EGR cooler if you still have one or head gasket.
	Appreciate 1 dmanb2b2123.00 Quote

07-09-2018, 04:16 PM	#3
335dlci Lieutenant Colonel 277 Rep 1,572 Posts Drives: 335d Join Date: Apr 2014 Location: Socal iTrader: (0)	Pressure test it. You won't have faults.
	Appreciate 0 Quote

07-12-2018, 11:52 AM	#4
Lovvi New Member 0 Rep 7 Posts Drives: 330d xDrive M-package Join Date: Jul 2018 Location: Estonia iTrader: (0)	Is your coolant mixed with some kind of oil in your coolant tank?
	Appreciate 0 Quote