plz help low coolant warning!!

Mbrown335i · 02-06-2015, 11:35 PM

Quote:

Originally Posted by pa2014

hey guys,

I filled up coolant roughly a few days ago, and coolant low sign popped up. i popped the hood n opened lid, i see most of the coolants i put in are gone. it seemed to be coolants were boiling really hot tho. Any idea what could be possibly wrong with it? if someone could help me out, I would appreciate it.

Take it somewhere and get a pressure test done. Should only charge you half hour labor

Dan Villa · 02-07-2015, 12:05 AM

Just happened to me this week. Ended up being a crack in the expansion tank.

ridge_racer · 02-10-2015, 12:57 PM

Quote:

Originally Posted by thegrinchboy

Had something similar recently. Turned out to be a cracked overflow tank.

Had the same thing 2 months ago. Cracked overflow tank. They said its a common issue.

Bours · 10-29-2017, 06:08 PM

Quote:

Originally Posted by JETmn

I didn't add coolant. It doesn't leak out fast, just a few drops some nights.

Same thing happened to me even tho they pressure tested it ! What was it finally ?

SeanCon · 10-29-2017, 06:17 PM

Same thing happened to me. Coolant spraying out of one of the hoses. I'd get it checked before you do damage to your engine.

juld0zer · 10-30-2017, 07:19 AM

There are so many possibilities for coolant leaks on this motor/car.

- Expansion tank seam
- Expansion tank cap not holding pressure
- Internally through the water pump, leaks out of the connector or seams
- Turbo coolant line orings
- Plastic crossover pipe that goes across the radiator/under the intake duct
- Internal leak via a failed oil filter housing gasket
- Ruptured hose
- Hose/clamp failure due to engine oil contamination, swelling and weakening the rubber. In particular the top hose and the hose from thermostat to cylinder head.
- Fractured plastic component such as radiator end tank, coolant hose fittings
- Radiator punctured

Get it pressure tested and inspected at a dealer or someone who knows these cars.

JETmn · 10-30-2017, 10:56 AM

Quote:

Originally Posted by Bours

Same thing happened to me even tho they pressure tested it ! What was it finally ?

Expansion tank that time. I also have replaced the radiator (drivers side outlet leaking) and water pump/t-stat.

02-07-2015, 12:05 AM	#24
Dan Villa Second Lieutenant 84 Rep 203 Posts Drives: 2020 M340i X-Drive Join Date: Mar 2014 Location: long Island iTrader: (1) Garage List 2020 BMW M340 [9.75]	Just happened to me this week. Ended up being a crack in the expansion tank.
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10-29-2017, 06:17 PM	#27
SeanCon First Lieutenant 102 Rep 374 Posts Drives: 2008 BMW 335i Join Date: Jan 2013 Location: Morristown NJ iTrader: (1)	Same thing happened to me. Coolant spraying out of one of the hoses. I'd get it checked before you do damage to your engine. __________________ Build Thread \| '08 E92 335i \| Pure \| MHD \| VRSF \| M-Sport \|
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10-30-2017, 07:19 AM	#28
juld0zer Lieutenant Colonel 480 Rep 1,600 Posts Drives: Prev 135i 7DCT, Now 130i 6sp Join Date: Jul 2016 Location: 2153 iTrader: (0)	There are so many possibilities for coolant leaks on this motor/car. - Expansion tank seam - Expansion tank cap not holding pressure - Internally through the water pump, leaks out of the connector or seams - Turbo coolant line orings - Plastic crossover pipe that goes across the radiator/under the intake duct - Internal leak via a failed oil filter housing gasket - Ruptured hose - Hose/clamp failure due to engine oil contamination, swelling and weakening the rubber. In particular the top hose and the hose from thermostat to cylinder head. - Fractured plastic component such as radiator end tank, coolant hose fittings - Radiator punctured Get it pressure tested and inspected at a dealer or someone who knows these cars.
	Appreciate 0 Quote