Low Coolant Light

yipronny · 04-12-2016, 10:58 AM

Hi everyone,

This morning starting the car for work, a low coolant light popped up instantly. I didn't find any water pooling underneath the car. I was in a hurry so I drove another car and didn't have time to inspect. I'm currently out of warranty and I don't have a code reader either. Its a n55 with about 40k miles. Is it the dreaded water pump issue

I thought I would be able to last longer. But if so, I guess time to get to some ole wrenching this weekend. Any advice or tips on where to purchase the cheapest water pump kit aside from fcpeuro

Thanks! !!

Fnne99 · 04-12-2016, 11:08 AM

If its just a little low, just top it off. The n54 seems to use a little bit of coolant of the course of a year so probably the same thing on the n55. I wouldn't go replacing the water pump at this point unless you want peace of mind.

Dekansnowman · 04-12-2016, 12:54 PM

Top it off, and if it happens again, check your reservoir. Mine cracked a little on the underside and you could see a tiny little dribble when it got hot. Never left a puddle, though.

They aren't expensive either, like $60 or something.

Buttertits · 04-12-2016, 01:13 PM

Quote:

Originally Posted by Dekansnowman

Top it off, and if it happens again, check your reservoir. Mine cracked a little on the underside and you could see a tiny little dribble when it got hot. Never left a puddle, though.

They aren't expensive either, like $60 or something.

This. Just happened to me 2 months ago.

yipronny · 04-12-2016, 02:28 PM

Okay, thank you guys so much, I will definitely check it out when i get home!

Vincent_E90 · 04-12-2016, 06:26 PM

I would also check the coolant pipe that sits right above the radiator, you'll have to remove the snorkel to see it if I remember correctly. This winter I got stuck on a snow berm and lost all my coolant in my reserve, and had no idea what it could be. After checking the reserve tank for leaks then checking the intercooler and water pump. I was about to pop off the radiator I saw that piping exploded and I was so mad because it was such an easy fix that I over complicated.

part #6 on this diagram

http://www.realoem.com/bmw/enUS/show...diagId=17_0376

techwhiz · 04-12-2016, 08:59 PM

Most likely place for coolant to leak is a bad expansion tank.
If it goes, the radiator is right behind.

yipronny · 04-12-2016, 11:02 PM

THANK YOU EVERYONE!!! you guys been super helpful, i was able to take a peek under the hood after work tonight. It seems like the expansion tank exploded lol, there is coolant spilled everywhere

The hose that runs above the radiator seems to be fine, but i figure since I am at it , might as well change it since it does look brittle.

Do you guys have any recommendation on where to purchase the expansion tank aside from fcpeuro?

Once again, thank u all

BeastMode335i · 04-13-2016, 05:18 AM

Just got mine off ebay brand new with 2 yr warranty for 45 bucks.. quality appears to be exact same as oem..

04-12-2016, 10:58 AM	#1
yipronny Private First Class 30 Rep 162 Posts Drives: 2012 e92 Join Date: Mar 2015 Location: Planet earth iTrader: (0)	Low Coolant Light Hi everyone, This morning starting the car for work, a low coolant light popped up instantly. I didn't find any water pooling underneath the car. I was in a hurry so I drove another car and didn't have time to inspect. I'm currently out of warranty and I don't have a code reader either. Its a n55 with about 40k miles. Is it the dreaded water pump issue I thought I would be able to last longer. But if so, I guess time to get to some ole wrenching this weekend. Any advice or tips on where to purchase the cheapest water pump kit aside from fcpeuro Thanks! !!
	Appreciate 0 Tweet Quote

04-12-2016, 11:08 AM	#2
Fnne99 Enlisted Member 2 Rep 44 Posts Drives: 2008 e92 335xi Join Date: Jun 2014 Location: Highlands Ranch, Co iTrader: (0)	If its just a little low, just top it off. The n54 seems to use a little bit of coolant of the course of a year so probably the same thing on the n55. I wouldn't go replacing the water pump at this point unless you want peace of mind.
	Appreciate 0 Quote

04-12-2016, 12:54 PM	#3
Dekansnowman Second Lieutenant 83 Rep 240 Posts Drives: 2011 335i Sedan Space Grey Join Date: Jan 2016 Location: Houston, Tx iTrader: (0)	Top it off, and if it happens again, check your reservoir. Mine cracked a little on the underside and you could see a tiny little dribble when it got hot. Never left a puddle, though. They aren't expensive either, like $60 or something.
	Appreciate 0 Quote

04-12-2016, 02:28 PM	#5
yipronny Private First Class 30 Rep 162 Posts Drives: 2012 e92 Join Date: Mar 2015 Location: Planet earth iTrader: (0)	Okay, thank you guys so much, I will definitely check it out when i get home!
	Appreciate 0 Quote

04-12-2016, 06:26 PM	#6
Vincent_E90 Second Lieutenant 81 Rep 241 Posts Drives: N54 E90 335i 6MT BSM Join Date: Sep 2014 Location: North Lake Tahoe, CA iTrader: (1)	I would also check the coolant pipe that sits right above the radiator, you'll have to remove the snorkel to see it if I remember correctly. This winter I got stuck on a snow berm and lost all my coolant in my reserve, and had no idea what it could be. After checking the reserve tank for leaks then checking the intercooler and water pump. I was about to pop off the radiator I saw that piping exploded and I was so mad because it was such an easy fix that I over complicated. part #6 on this diagram http://www.realoem.com/bmw/enUS/show...diagId=17_0376 __________________ Mine - 2008 E90 335i Black Sapphire Metallic 6MT \| New OEM Turbos @ 111k\| Cobb Stage 2 LT Sport \| Full Stainless Steel Akrapovic Exhaust \| 5'' Stepped FMIC \| VRSF Catless Downpipes\| 19in BBS CH-R Matte Black \| aFe Stage 2 Air Intake and air scoops\| Mishimoto OCC\| M-Tech Front Bumper
	Appreciate 0 Quote

04-12-2016, 08:59 PM	#7
techwhiz Colonel 453 Rep 2,973 Posts Drives: e90 335i Sedan - Arctic Join Date: Feb 2012 Location: Bay Area, Ca iTrader: (4)	Most likely place for coolant to leak is a bad expansion tank. If it goes, the radiator is right behind. __________________ Arctic Metallic\CF Splitters, Spoiler, Mirror Covers\LED Tails\LSD\Tinted\Coded\Apex Square SM10-19"\LED Angel Eyes\Gloss Black Grill\Integrated V1 & Galaxy Tab\M-Performance Brakes\Cobb Tuned\xHP Flash\Resonator Removed and -> is your friend.
	Appreciate 0 Quote

04-12-2016, 11:02 PM	#8
yipronny Private First Class 30 Rep 162 Posts Drives: 2012 e92 Join Date: Mar 2015 Location: Planet earth iTrader: (0)	THANK YOU EVERYONE!!! you guys been super helpful, i was able to take a peek under the hood after work tonight. It seems like the expansion tank exploded lol, there is coolant spilled everywhere The hose that runs above the radiator seems to be fine, but i figure since I am at it , might as well change it since it does look brittle. Do you guys have any recommendation on where to purchase the expansion tank aside from fcpeuro? Once again, thank u all
	Appreciate 0 Quote

04-13-2016, 05:18 AM	#9
BeastMode335i Maximus Decimus Meridius 1130 Rep 4,584 Posts Drives: F30 335i Join Date: Apr 2014 Location: Down South iTrader: (2)	Just got mine off ebay brand new with 2 yr warranty for 45 bucks.. quality appears to be exact same as oem.. __________________ F30 335i Melbourne Red Metallic M-Sport Package
	Appreciate 0 Quote