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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin > Replacing/troubleshooting F30 N26 thermostat?
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      07-16-2017, 02:18 PM   #1
fe7565
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Replacing/troubleshooting F30 N26 thermostat?

Do not seem to find any guide on replacing/troubleshooting F30 N26 thermostat (part# 11-53-8-635-689). I know it's not rocket science, but it can make the difference between 2-3 hours vs. 5-6 hours of labor if I know what I am doing.

I am at 70,000 miles and have a P0597 code and the temperature gauge comes up much slower than usual so I figured that the thermostat failed in the open position (as designed). At 44,000 miles the dealer replaced the thermostat once already (while still under warranty) under the SIB 11-22-14 recall. There is a Extended Life Warranty to 10yrs/120,00 miles on thermostats for certain models (but my pre-Aug 2013 328i does not qualify according to my dealer and BMW NA), and there is another SIB 12-33-14 with the same issue of thermostats. This would be my 3rd thermostat for this car and if you check the related attachments BMW had been replacing them in large numbers where they had to put a dealer ordering quota on part# 11-53-8-635-689. Do not understand why my particular VIN# is not included when clearly this is a lemon part. Attached below the information I was able to gather.

I took pictures (see attached) of the Code Reader showing the freeze-frame when the CEL code happened to register.

Appreciate any inputs.
Attached Images
       
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File Type: pdf SB-10058476-4969.pdf (404.0 KB, 503 views)
File Type: pdf F30 LME.pdf (2.12 MB, 90 views)
File Type: pdf RMISC-16V914-8887.pdf (458.0 KB, 70 views)
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      06-03-2020, 12:26 PM   #2
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I realize this is old but my GT needs a thermostat/housing replacement. Did you ever figure it out? I'm keen on making this 2-3 hrs. Thanks bro
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      06-03-2020, 02:56 PM   #3
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Quote:
Originally Posted by alainv1029 View Post
I realize this is old but my GT needs a thermostat/housing replacement.
From new TIS: https://www.newtis.info/tisv2/a/en/f...lines/HiHwXAWo

There are probably YouTube videos for the procedure, too.
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      06-07-2020, 10:04 PM   #4
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The actual removal of the thermostat is not that difficult, BUT should have the right sockets/extensions. Can't remember all what I did, but I think the lowest point is at the lower part of the radiator (in addition to the pump itself).

Be prepared to replace ALL the cooling fluid, make sure use 50/50 or pre-mixed. When done, use the BMW air bleed procedure (with battery charger hoked up to the battery to keep the water pump working without engine power, and use the air bleed screws) which will get all the air out of the system.
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      06-07-2020, 11:21 PM   #5
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Quote:
Originally Posted by alainv1029 View Post
I realize this is old but my GT needs a thermostat/housing replacement. Did you ever figure it out? I'm keen on making this 2-3 hrs. Thanks bro
You should swing by the dealer first. Should be covered under an extended warranty.

My N26 had the same issue and it was repaired after the 50k mile original warranty was up... completely free.

Same state, same engine... dont see why yours wouldnt be covered?
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      06-25-2020, 11:02 AM   #6
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As Spade stated, these are under an extended warranty by BMW NA. The warranty is to 100k miles. Mine failed somewhere in the 50k mile range as well. Dropped my car off at the dealer and had it back the next day. It's a common issue. BMW updated the part, so you'll be getting the updated part when they perform the work.
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      09-04-2020, 04:05 AM   #7
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This is concerning the original post date of this thread:
I did print out the BMW bulletin about the thermostat issues that is common to this model. I think there were at least two bulletins for two different part numbers. Based on service history, two other thermostats were replaced already on my car. Still, my BMW dealer would not replace it back then. Luckily the thermostat was not expensive. I bought it on Ebay for $63 in 2017...checking now they go for even less at around $38.

Did the dealer replace yours?

Last edited by fe7565; 09-04-2020 at 04:21 AM..
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      11-01-2020, 02:31 AM   #8
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Hey guys, not sure you you could offer some advice.I have a 2016 320i, once I turn the car on the thermostat goes up almost approaching 120, regardless of driving or the car still being in park. Had a broken coolant bottle and damaged hose which was replaced last year. Recently did a servicing. Would love to hear what y’all think.
Thanks
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