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BMW 3-Series (E90 E92) Forum
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DIY – Water Pump & Thermostat Replacement (2007 335i w/Automatic Transmission)
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11-14-2018, 02:22 PM | #287 |
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I’d replace the Oil Filter Housing Gaskets at the same time as they require loss of coolant to do the work. I am also replacing thenSerpentine belt, idlers & tensioner. (See below).
I have a 335is cabrio. There are an extra 4 braces that supposedly help quell scuttle shake (only partially successfully). They run from the rocker area immediately behind the jack point to the center of the front crossmember w/ 4 bolts each and a pair of tubular steel formed braces that run from the front center of the front crossmember to the “frame rails” to the fender support immediately forward of the strut towers. Taking those out was a pain in the butt, but I could see no way to get at the upper mounting bolt for the pump. Also have to be removed to replace the serpentine belt & idlers. I’m doing it all (ugh). |
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07-08-2019, 04:47 AM | #288 |
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I am pretty sure it does but does this apply to a DCT transmission?
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2011 335is DCT BQ Tuning / BMS CAI / VRSF kittyless DP's / Synapse BOV and charge pipe / 7" VRSF Race FMIC / Walbro 535 and 450 on BMP4 / E90 tune / Diff Brace / PR Coils / Relocation Inlets / DAW Stage3+ Turbos / MMP port injection / xHP Stage 3 / FPR and -6 fuel lines
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07-11-2019, 07:14 AM | #289 |
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Also should I drain all my coolant out of the system before I start this or just replace what is lost after changing the parts?
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2011 335is DCT BQ Tuning / BMS CAI / VRSF kittyless DP's / Synapse BOV and charge pipe / 7" VRSF Race FMIC / Walbro 535 and 450 on BMP4 / E90 tune / Diff Brace / PR Coils / Relocation Inlets / DAW Stage3+ Turbos / MMP port injection / xHP Stage 3 / FPR and -6 fuel lines
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07-11-2019, 07:26 AM | #290 | |
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If you don't want to put fresh coolant I would just not touch the radiator drain and just refill to full. |
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07-11-2019, 10:19 AM | #291 | |
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Quote:
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2011 335is DCT BQ Tuning / BMS CAI / VRSF kittyless DP's / Synapse BOV and charge pipe / 7" VRSF Race FMIC / Walbro 535 and 450 on BMP4 / E90 tune / Diff Brace / PR Coils / Relocation Inlets / DAW Stage3+ Turbos / MMP port injection / xHP Stage 3 / FPR and -6 fuel lines
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07-28-2019, 06:33 PM | #292 |
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Hello E90ers! I'm usually hanging out in the F30 forums, but my family's E90 335i (2008) is throwing a thermostat code. I can definitely pull off the DIY, but a quick question that I couldn't find addressed in my brief scanning of the thread:
The car is only throwing a thermostat code, is it inadvisable to save some $ and just replace just the thermostat and leave the water pump as is? T-stats are running around $60 whereas the pumps are $300-ish. If I can save the $300 by not replacing a water pump that seems to be operating fine, I'm all for it.
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2013 F30 335i RWD ZF Melbourne Red
~Remus Sport Axleback~VRSF Chargepipe~VRSF Catless Downpipe~GPlus FMIC~HR Sport Springs~Active Autowerke OBD Flash Tune Stage 2~ |
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07-29-2019, 07:35 AM | #293 | |
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10-23-2019, 12:10 PM | #294 |
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I went through this last night after my water pump developed the typical crack in the housing. This was the second time mine has been replaced, but the first time for me to do it myself. I suspect this made it a little easier as I didn't run into many issues with the hoses, but that top bolt was definitely a pain. It took me 2.5-3 hours.
The real reason I came on here was to let others know that the CARQUEST water pump I purchased from Advance Auto actually came with an all aluminum housing, so no more worries about cracking. This was a very pleasant surprise, as their website picture still shows it with the plastic housing. They have it listed for $396, but when you get to the page they will pop-up an ad for 25% off if you purchase it online. So not a bad deal for $300... https://shop.advanceautoparts.com/p/...322/10626270-P |
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08-02-2020, 05:39 PM | #295 |
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Drives: 2008 BMW 135i Sport
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I went through this over the weekend. I was initially unsure where the leak was as it was leaking above the 4 pin connector and around to the bottom of the water pump housing.
Hoses all were in excellent condition as the pump was replaced at 70k and only has 29k on it. I ended up filling the removed water pump with water and turning the u pipe upwards and letting it sit and low and behold, water began leaking out of the housing. Good way to test your pump if the leak is elusive. |
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11-26-2020, 01:36 PM | #296 |
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Water pump failure mode
Hi all
My car was running fine but I noticed that the cooling fan was running on high a lot. First water pump went out six years ago at 70kmi. Car now has 135kmi. Pulled the water pump and thermostat to replace. The thermostat was the original( 2007 335i sedan with manual transmission) with the metal housing. Pulled the working water pump apart and found coolant inside the electric motor housing. See photos. Also replacing the original serpentine belt. The belt looked good upon removal but one of the idlers ( the lowest one) had a bad bearing. Removing and installing the water pump and thermostat is tedious and no fun as your hands get covered with coolant. The job is made much easier by removing the intake crossover tube, radiator fan and inter cooler. |
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11-27-2020, 06:44 PM | #297 |
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The pump is designed to have coolant circulating around the rotor. Rotor is submerged in coolant during operation. The chamber the rotor is in is sealed from the rest of the housing where the windings and electronics take place. Those areas look dry in your pictures. So that doesn't indicate any problem.
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01-01-2021, 12:06 PM | #298 |
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That is what I figured. There was some coolant in the windings but I am not sure if it was from taking things apart though. The entire chamber was not full with coolant.
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03-29-2021, 07:19 AM | #300 |
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Hi!
I just got the water pump for my 335i (reference code: 11515A05704, which I'm being told is the latest revision). Checked bmwofsouthatlanta.com and confirms it. The bolts attached are the ones with reference code 11517602123 (26mm). Is this combination correct, right? Odd thing is the water pump got the three rubber isolators at the bolting locations, which the OP said were deprecated... Thanks in advance! |
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07-22-2023, 11:15 PM | #301 | |
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After slow coolant loss over time, it started dripping a lot last week. Car is over 103K miles and sure enough I saw a whole mess around water pump area.
I ordered the Pierburg all aluminium water pump from fcpeuro (part of kit). Hopefully it holds up better! https://www.fcpeuro.com/products/bmw...rg-11519455978 Thank you for this addendum on XI (mine is 2011 335XI). Wheel, liner and exhaust fan has to come out. And the PS mounting bracket on driver's side is a real b*tch. Took me 1 hour to remove using a standard 10mm box wrench. Highly recommend getting a ratcheting style. I am half way there and will continue tomorrow. Quote:
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07-22-2023, 11:26 PM | #302 |
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WP is just a start. After I removed all the underbelly, wheel, liner etc. I got a good look and it is a solid mess down there. A lot of oil leak as well. Once I finish this job, I am looking at OFHG, serpentine belt, Valve Cover Gasket. The joys of owning a BMW
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07-27-2023, 06:46 PM | #303 |
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All done and bolted up. I gave up on putting back the driver side PS bracket mounting bolt. Couldn't even get the thread started. Just zip tied it. It is not holding any weight and is wedged pretty well in the cross member. Phew! Definitely one of the hardest DIY I ever done. Now on to OFHG
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