Coolant Leak

Masry335i · 03-04-2017, 07:54 PM

Hey guys quick question regarding a coolant leak, and need some help locating it... Walked to my car this morning and all the coolant had drained onto the ground, big leak sprung over night.

Topped her off and drove around for a bit and its leaking again but i cant trace it back, all i can tell you is it is coming from the passenger side middle of the engine bay. Any ideas of coolant parts that commonly fail around that area? This cars gonna be the death of me!!!

slupie · 03-04-2017, 08:17 PM

Quote:

Originally Posted by Masry335i

Hey guys quick question regarding a coolant leak, and need some help locating it... Walked to my car this morning and all the coolant had drained onto the ground, big leak sprung over night.

Topped her off and drove around for a bit and its leaking again but i cant trace it back, all i can tell you is it is coming from the passenger side middle of the engine bay. Any ideas of coolant parts that commonly fail around that area? This cars gonna be the death of me!!!

water pump an t-stat housing is on that side plus few hoses that connect to both

PichaDis11 · 03-04-2017, 08:41 PM

There's a lot places the leak could be coming from. Just that the place on the ground wouldn't let you know exactly the source of the problem as our cars have a undercarriage pan. Check all the weak points of the system. The expansion tank and the overflow vent hose that runs across the top of your radiator. Peep at the lower hoses below as well.

feuer · 03-04-2017, 09:51 PM

Cracked water pump.

blackturbo · 03-05-2017, 04:14 PM

A leak that big shouldn't be too hard to find.
Open the hood to see if its coming from the top side or underneath. A compression test can easily find it.

Cracked water pump or
Radiator or
Hose or
Coolant reservoir (cap is known to fail too) or
Turbo coolant line

Chappers 71 · 03-05-2017, 05:51 PM

Best to get it up on a lift, take under tray off start it up & have a good look.
Bottom of rad went on mine. Fortunately It was noticed when fitting inter cooler before it got to bad.

Masry335i · 03-08-2017, 03:57 PM

Hey guys after taking off the undertrays and finding nothing, i popped the hood looked closer found a flow traced it back and gave the slightest pull with my pinky finger and the hose came loose, and found this. What part is this?

Masry335i · 03-08-2017, 03:59 PM

Will that one bolt take that piece off and its an easy fitting to replace?

Masry335i · 03-08-2017, 04:18 PM

Problem solved i just went ahead removed the bolts and pried her off. Thanks for the help everyone. Hopefully this can help others.

TheBingoBalls · 03-08-2017, 06:41 PM

Yup. That hose completely snapped off for me to. I'm glad that it happened when it was parked in the garage at home and not when I was out. For a hose to break off like that is pretty ridiculous especially when it's a part that is stationary and its only function is to allow fluid to travel.

Efthreeoh · 03-09-2017, 06:06 AM

There is a thread somewhere on E90 post about replacement of that hose bib with an aluminum part. It might be in the DIY section or in the maintenance section. Maybe look at ECS for the part.

John 070 · 03-09-2017, 07:32 AM

looks like there's a wire whose jacket is broken....also should make sure no coolant got on the belt, right? So it doesn't slip....

doru · 03-09-2017, 09:24 AM

Quote:

Originally Posted by Efthreeoh

There is a thread somewhere on E90 post about replacement of that hose bib with an aluminum part. It might be in the DIY section or in the maintenance section. Maybe look at ECS for the part.

This is the part. Saved my bacon last weekend when I replaced the OFG, belts pulleys, valve cover and other stuff on my daughter's X3 with the N52 engine. Same part for the N54 engine.From ebay. Linky.

Masry335i · 03-09-2017, 05:15 PM

hey guys quick question, The receptacle came with the whole coolant hose but i cant seem to make enough room to get the other side of the coolant hose out... any ideas or any guides out there?

03-04-2017, 07:54 PM	#1
Masry335i Private 14 Rep 81 Posts Drives: E92 335i 6mt Join Date: Jan 2016 Location: Toronto iTrader: (0)	Coolant Leak Hey guys quick question regarding a coolant leak, and need some help locating it... Walked to my car this morning and all the coolant had drained onto the ground, big leak sprung over night. Topped her off and drove around for a bit and its leaking again but i cant trace it back, all i can tell you is it is coming from the passenger side middle of the engine bay. Any ideas of coolant parts that commonly fail around that area? This cars gonna be the death of me!!!
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03-04-2017, 08:41 PM	#3
PichaDis11 Colonel 295 Rep 2,202 Posts Drives: E90 N52 Join Date: Mar 2013 Location: NY iTrader: (3)	There's a lot places the leak could be coming from. Just that the place on the ground wouldn't let you know exactly the source of the problem as our cars have a undercarriage pan. Check all the weak points of the system. The expansion tank and the overflow vent hose that runs across the top of your radiator. Peep at the lower hoses below as well. __________________ Retrofits: 322, 609, 6FL, 6NR, 6VC, 2TB.. Upgrades: Bilstein B8 Eibach Spring kit
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03-04-2017, 09:51 PM	#4
feuer Major General 4276 Rep 9,206 Posts Drives: wife crazy! Join Date: Apr 2015 Location: Chicago, IL iTrader: (5)	Cracked water pump.
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03-05-2017, 04:14 PM	#5
blackturbo Captain 59 Rep 645 Posts Drives: 335i Join Date: Jul 2013 Location: vancouver iTrader: (1)	A leak that big shouldn't be too hard to find. Open the hood to see if its coming from the top side or underneath. A compression test can easily find it. Cracked water pump or Radiator or Hose or Coolant reservoir (cap is known to fail too) or Turbo coolant line
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03-05-2017, 05:51 PM	#6
Chappers 71 Major General 5485 Rep 5,422 Posts Drives: Beige G31 40ix m sport Join Date: Feb 2016 Location: Kent, The Garden of England iTrader: (0) Garage List 2018 G31 xdrive 40i ... [4.00] 2006 E92 335i SE [9.50]	Best to get it up on a lift, take under tray off start it up & have a good look. Bottom of rad went on mine. Fortunately It was noticed when fitting inter cooler before it got to bad. __________________ G31 40ix M Sport E92 335i. E36 328is coupe E39 540i V8 6SP manual E34 3.6 M5. E34 525i sport. VW Jetta Mk2 GTI 16v. 1679cc 1967 resto-cal beetle
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03-08-2017, 03:57 PM	#7
Masry335i Private 14 Rep 81 Posts Drives: E92 335i 6mt Join Date: Jan 2016 Location: Toronto iTrader: (0)	UPDATE - I Hope im not F***** Hey guys after taking off the undertrays and finding nothing, i popped the hood looked closer found a flow traced it back and gave the slightest pull with my pinky finger and the hose came loose, and found this. What part is this?
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03-08-2017, 03:59 PM	#8
Masry335i Private 14 Rep 81 Posts Drives: E92 335i 6mt Join Date: Jan 2016 Location: Toronto iTrader: (0)	Will that one bolt take that piece off and its an easy fitting to replace?
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03-08-2017, 04:18 PM	#9
Masry335i Private 14 Rep 81 Posts Drives: E92 335i 6mt Join Date: Jan 2016 Location: Toronto iTrader: (0)	CLOSED Problem solved i just went ahead removed the bolts and pried her off. Thanks for the help everyone. Hopefully this can help others.
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03-08-2017, 06:41 PM	#10
TheBingoBalls Brigadier General 3821 Rep 4,660 Posts Drives: BMW Join Date: Mar 2011 Location: Toronto, Ontario iTrader: (1) Garage List 2018 F36 BMW 440i x ... [0.00]	Yup. That hose completely snapped off for me to. I'm glad that it happened when it was parked in the garage at home and not when I was out. For a hose to break off like that is pretty ridiculous especially when it's a part that is stationary and its only function is to allow fluid to travel.
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03-09-2017, 06:06 AM	#11
Efthreeoh General 17317 Rep 18,740 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Virginia iTrader: (0)	There is a thread somewhere on E90 post about replacement of that hose bib with an aluminum part. It might be in the DIY section or in the maintenance section. Maybe look at ECS for the part. __________________ A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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03-09-2017, 07:32 AM	#12
John 070 Lieutenant General 1705 Rep 14,829 Posts Drives: 335i cpe Join Date: Oct 2006 Location: ZSP/ZPP/ZCW iTrader: (0)	looks like there's a wire whose jacket is broken....also should make sure no coolant got on the belt, right? So it doesn't slip....
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03-09-2017, 05:15 PM	#14
Masry335i Private 14 Rep 81 Posts Drives: E92 335i 6mt Join Date: Jan 2016 Location: Toronto iTrader: (0)	hey guys quick question, The receptacle came with the whole coolant hose but i cant seem to make enough room to get the other side of the coolant hose out... any ideas or any guides out there?
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