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      03-05-2018, 12:27 PM   #111
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About to attempt this. With labor costs from $400-600, that's highway robbery. Don't understand how DIYer's are doing this in 3hrs and professional indy shops are quoting 5-6.

Question - the ECStuning replacement kit (https://www.ecstuning.com/b-assemble...1537836155kt1/) comes with 1 liter of coolant, while the genuine replacement kit comes with a gallon. Assuming I should get more coolant than 1 liter? If so, how much? It also says to dilute 50:50 with distilled water. Meaning, if we needed to refill with 2 gallons total, you need 1 gallon of water : 1 gallon of coolant.

I am going to attempt the method Lunker325 did - purchased the transfer pump for $10 on Prime.

Also doing the temperature sensor as well (is this located in the tstat housing as well)?

Thanks for the fantastic DIY and awesome thread contributions!!!
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Last edited by noremaC; 03-05-2018 at 12:34 PM..
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      03-05-2018, 01:05 PM   #112
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This is covered under CA Emmissions Warranty on a 2011. Just had mine covered under that 7/70 Warranty.
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      03-07-2018, 12:07 PM   #113
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I used less than a gallon of 50/50 mix when I replaced the radiator, hoses, and t-stat. I would think if you're just doing the tstat without draining a liter (two liters when mixed into 50/50) ought to get you there

Sensor is in the tstat housing
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      05-11-2018, 10:24 AM   #114
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If I am only replacing the coolant sensor, do I still need to drain or siphon out the coolant?
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      05-15-2018, 10:14 AM   #115
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Quote:
Originally Posted by exclusivedetails View Post
If I am only replacing the coolant sensor, do I still need to drain or siphon out the coolant?
You might spill a very very small amount, but that's not going to affect anything. I wouldn't bother even siphoning.
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      02-18-2019, 08:30 AM   #116
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3 hours for mechanical inclined?

Just finished this job on my 08 m3. No idea where the times come from that people are saying it takes to do this job. From first bolt to last bolt 1 hour 35 minutes and that was with taking a dunkins run as well to get coffee. You could easily do this job under a hour.

I work in the industry and even Mitchel labor guide has the time at 4.5 hours for R&R as well which boggles me why.
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      06-10-2019, 11:54 AM   #117
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How the hell did you get the thermostat housing back on those rear pipes without shearing the o-rings?

I literally used a carpenters clamp across the thermostat to the 90 deg turn on the coolant pipes to get it on only to discover it tore the o-rings and leaked out ~1 gallon of coolant into the V and down the back of the engine.

Got new o-rings but cannot for the life of me get the housing seated without bulging out and tearing the o-rings. I've got through 3 of them so far and have used assembly lube, coolant and even dish soap to try to lubricate the o-rings. I think the housing end has a slightly rounded lip so might be better without shearing but I can't get it seated even pushing and wiggling the damn thing with all my strength. I'm worried about pushing the car off the jack stands.

Any advice whatsoever would be greatly appreciated
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      06-10-2019, 12:26 PM   #118
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I used a tiny bit of grease as the lubricant. Obviously make sure nothing is in the way in the receiving end. Maybe lightly lubricate that area as well. It did take some effort to get them in.
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      06-10-2019, 08:12 PM   #119
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Quote:
Originally Posted by pbonsalb View Post
I used a tiny bit of grease as the lubricant. Obviously make sure nothing is in the way in the receiving end. Maybe lightly lubricate that area as well. It did take some effort to get them in.
Thanks for the advice, I realized it was really just one of the o-rings that had been fighting me with a vengeance so I pulled it out and was going to try my last spare with some grease like you mentioned and noticed that the offending o-ring was swollen much larger than the others/new one. Either it absorbed something I put on it trying to lube it up or it was just a bad o-ring but after swapping in the new one and with a tiny bit of lube it went on much easier.

FYI for the future folks attempting this DIY, get at least 5 (maybe 6) of those o-rings to replace the 4 squashed/dried out ones in there and check for consistency between the new ones since it's a tight fit.

Cheers
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