Leaking water pump on 335i? - BMW 3-Series (E90 E92) Forum

JaSSon · 11-02-2012, 12:10 PM

Has anyone ever seen the water pump leak on their 335?

I've got an '07 335i e92 6MT with 75k miles on it. Last weekend I: flushed coolant, changed oil, replaced leaking oil filter housing gaskets, and replaced my damaged OE FMIC with a VRSF part. At no point in time did I tinker in the area of the water pump. Thursday on my commute to work the low coolant light came on.

I've got it up on jack stands now, and the leak is at the pump, or one of the immediately attached hoses. I've removed the 3 visible worm gear clamps, repositioned, and tightened the F out of them, and it's been reduced to a slow trickle. Has anyone seen one of the hoses fail at the the water pump, or seen the water pump itself leak? My water pump works fine, and I can hear water flow thru system.

JaSSon · 11-02-2012, 02:20 PM

Near as I can tell, the brown plastic section of my water pump has a hairline crack in it.

Damnit.

blingman · 11-02-2012, 03:37 PM

The pumps are known to go out as low as few thousands miles to over 100K miles. Its random. I think there's an updated part out, but no history that it has solved the problem.

JaSSon · 11-02-2012, 04:36 PM

Quote:

Originally Posted by blingman

The pumps are known to go out as low as few thousands miles to over 100K miles. Its random. I think there's an updated part out, but no history that it has solved the problem.

I've read of them failing, but not of them leaking.

fun2drive · 11-02-2012, 08:30 PM

Anyway to epoxy it or JBweld it? I mean you have nothing to lose.

fenixxishot · 11-03-2012, 01:28 AM

Mine leaked enough coolant out for the light to come on and 300 miles later bam water pump is toast.

JaSSon · 11-03-2012, 02:21 PM

I ordered a water pump/thermostat/etc yesterday. I'll do the repair next weekend. I'll just keep a couple gallons distilled water in the trunk, it'll make the repair just that much cleaner

fenixxishot · 11-03-2012, 04:29 PM

its really not an extremely difficult repair. Someone one who has a general understanding of auto repair can tackle this I think I spent around 3-4 hours doing it. You do need a relatively uncommon tool you need inverted torx bits to get the 3 bolts that hold the WP in place. their is a DIY that is quite useful

JaSSon · 11-08-2012, 06:45 PM

Everything was pretty straight forward except for the thermostat quick disconnects. Still cant get those to let go!

edrive90 · 01-10-2013, 09:57 AM

Hey Jasson, Fennix - can you let us know how it turned out? Is this a fairly straightforward DIY? Where'd you get your DIY info?

I need to replace the WP and the OFHG - is it easier to do them both at once?

thx..

fenixxishot · 01-10-2013, 01:57 PM

Yes it's a pretty non complicated swap its a tight space and those quick release clamps can be a bitch to actually release but their is a written DIY just follow that.

fenixxishot · 01-10-2013, 01:58 PM

Oh and just replace them both once the wp is out the thermo is very accessible.

DanielGonz · 01-10-2013, 01:59 PM

You're going to have to do the water pump eventually. May as well address the leaking water pump with a new unit since it's bound to fail.

JaSSon · 01-31-2013, 01:47 PM

OFHG? I worked on it here and there across two days. The only hard part are those damned thermostat hoses.

I replaced the water pump and thermostat at the same time. They're made of similar material, so should have similar life spans.

11-02-2012, 12:10 PM	#1
JaSSon Down with the N54. Drives: I has a E92! Join Date: Mar 2011 Location: Columbus, OH Posts: 339 iTrader: (0)	Leaking water pump on 335i? Has anyone ever seen the water pump leak on their 335? I've got an '07 335i e92 6MT with 75k miles on it. Last weekend I: flushed coolant, changed oil, replaced leaking oil filter housing gaskets, and replaced my damaged OE FMIC with a VRSF part. At no point in time did I tinker in the area of the water pump. Thursday on my commute to work the low coolant light came on. I've got it up on jack stands now, and the leak is at the pump, or one of the immediately attached hoses. I've removed the 3 visible worm gear clamps, repositioned, and tightened the F out of them, and it's been reduced to a slow trickle. Has anyone seen one of the hoses fail at the the water pump, or seen the water pump itself leak? My water pump works fine, and I can hear water flow thru system.
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01-10-2013, 01:59 PM	#13
DanielGonz First Lieutenant Drives: AW E92 335i 6 speed Join Date: Apr 2012 Location: SoCal (OC) Posts: 300 iTrader: (0)	You're going to have to do the water pump eventually. May as well address the leaking water pump with a new unit since it's bound to fail. __________________ 07 AW E92 335 6MT [18" OEM 193's For Sale, PM me] OEM Aero Lip \| KW V2 \| Vorsteiner CSL trunk \| Angel ibright Angel Eyes \| 3000K HID fogs \| 6000k HID low beams \| AFE DCI \| Full LED conversion

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11-02-2012, 02:20 PM	#2
JaSSon Down with the N54. Drives: I has a E92! Join Date: Mar 2011 Location: Columbus, OH Posts: 339 iTrader: (0)	Near as I can tell, the brown plastic section of my water pump has a hairline crack in it. Damnit.

11-02-2012, 03:37 PM	#3
blingman First Lieutenant Drives: 2006 325i Join Date: Mar 2011 Location: North DFW Posts: 300 iTrader: (1)	The pumps are known to go out as low as few thousands miles to over 100K miles. Its random. I think there's an updated part out, but no history that it has solved the problem.

11-02-2012, 08:30 PM	#5
fun2drive BMWCCA 149159 Drives: E93 335 Vert E36 M3/4 Join Date: Jul 2006 Location: Florida Panhandle Posts: 379 iTrader: (1)	Anyway to epoxy it or JBweld it? I mean you have nothing to lose.

11-03-2012, 01:28 AM	#6
fenixxishot Lieutenant Drives: 08 335i e92 AW MT Join Date: Feb 2011 Location: Austin Posts: 467 iTrader: (4)	Mine leaked enough coolant out for the light to come on and 300 miles later bam water pump is toast.

11-03-2012, 02:21 PM	#7
JaSSon Down with the N54. Drives: I has a E92! Join Date: Mar 2011 Location: Columbus, OH Posts: 339 iTrader: (0)	I ordered a water pump/thermostat/etc yesterday. I'll do the repair next weekend. I'll just keep a couple gallons distilled water in the trunk, it'll make the repair just that much cleaner

11-03-2012, 04:29 PM	#8
fenixxishot Lieutenant Drives: 08 335i e92 AW MT Join Date: Feb 2011 Location: Austin Posts: 467 iTrader: (4)	its really not an extremely difficult repair. Someone one who has a general understanding of auto repair can tackle this I think I spent around 3-4 hours doing it. You do need a relatively uncommon tool you need inverted torx bits to get the 3 bolts that hold the WP in place. their is a DIY that is quite useful

11-08-2012, 06:45 PM	#9
JaSSon Down with the N54. Drives: I has a E92! Join Date: Mar 2011 Location: Columbus, OH Posts: 339 iTrader: (0)	Everything was pretty straight forward except for the thermostat quick disconnects. Still cant get those to let go!

01-10-2013, 09:57 AM	#10
edrive90 Scare 'em straight Drives: 2007 335i E90 Join Date: Jan 2011 Location: maryland Posts: 165 iTrader: (0)	Hey Jasson, Fennix - can you let us know how it turned out? Is this a fairly straightforward DIY? Where'd you get your DIY info? I need to replace the WP and the OFHG - is it easier to do them both at once? thx..

01-10-2013, 01:57 PM	#11
fenixxishot Lieutenant Drives: 08 335i e92 AW MT Join Date: Feb 2011 Location: Austin Posts: 467 iTrader: (4)	Yes it's a pretty non complicated swap its a tight space and those quick release clamps can be a bitch to actually release but their is a written DIY just follow that.

01-10-2013, 01:58 PM	#12
fenixxishot Lieutenant Drives: 08 335i e92 AW MT Join Date: Feb 2011 Location: Austin Posts: 467 iTrader: (4)	Oh and just replace them both once the wp is out the thermo is very accessible.

01-31-2013, 01:47 PM	#14
JaSSon Down with the N54. Drives: I has a E92! Join Date: Mar 2011 Location: Columbus, OH Posts: 339 iTrader: (0)	OFHG? I worked on it here and there across two days. The only hard part are those damned thermostat hoses. I replaced the water pump and thermostat at the same time. They're made of similar material, so should have similar life spans.