[techmaster05]

has anybody put one in?? I ordered a brand new oe thermostat and the mishi racing thermostat for my 2007 335i e90 and when I take the oe thermostat apart and put the mishi inside it doesn't fit and their is an electrical connection on the oe internal part but nothing on the mishi. at this point im pretty frustrated cause I completely took apart the oe internal part and their is no going back. I could not find a diy anywhere

http://www.ecstuning.com/BMW-E90-335....0L/ES2804271/" rel="ugc" target="_blank">http://<a href="http://www.ecstuning...ES2804271/</a>

[335NJ]

Note: Vehicle must be equipped with stock plastic thermostat housing in order to install this thermostat. If the car still has a metal thermostat housing, BMW 11537549476 or BMW 11537601158 must be purchased in order to install thermostat.

The metal pin must be carefully removed from the Mishimoto thermostat with pliers before installed into plastic thermostat housing.


I took this from ECS website, does this help at all? If all else fails, call them up. I've met a few of the guys at Mishimoto and i'm sure they'll be happy to help you out.

[techmaster05]

Originally Posted by 335NJ

Note: Vehicle must be equipped with stock plastic thermostat housing in order to install this thermostat. If the car still has a metal thermostat housing, BMW 11537549476 or BMW 11537601158 must be purchased in order to install thermostat.

The metal pin must be carefully removed from the Mishimoto thermostat with pliers before installed into plastic thermostat housing.


I took this from ECS website, does this help at all? If all else fails, call them up. I've met a few of the guys at Mishimoto and i'm sure they'll be happy to help you out.

I bought a brand new oe plastic thermostat which is one of those part numbers there. ill try to call them tomorrow I just dont understand why they would not release a diy causd its not a direct fit. the oe internal part is bigger and fatter plus has electrical pins whereas this mishi one does not

[Julian2485]

Originally Posted by techmaster05

I bought a brand new oe plastic thermostat which is one of those part numbers there. ill try to call them tomorrow I just dont understand why they would not release a diy causd its not a direct fit. the oe internal part is bigger and fatter plus has electrical pins whereas this mishi one does not

Did you ever get this sorted out as I was thinking of purchasing the same item. Was it necessary to purchase a new oem thermostat housing or could I just open up the one on my car now ?

[WatashiEd]

Sorry for bumping an old thread guys, I just bought mine and actually got the same issue.

Emailed ECS but no reply, did you guys end up fitting them ok?

Thanks in advance.

[bradsm87]

74C/165F is a very low opening temp. Prob OK for a track-only car. Be sure to lower the coolant target temp in the tune otherwise no point as the water pump control will still try and target stock temps.

[TrollToll]

Originally Posted by bradsm87

74C/165F is a very low opening temp. Prob OK for a track-only car. Be sure to lower the coolant target temp in the tune otherwise no point as the water pump control will still try and target stock temps.

Did you actually read anything posted in this thread or just come to share your opinion on the temperature?

[terryd5150]

The only direct feedback I've seen in this was from Vargas.

He managed to get it to fit one of the thermostat PNs that Mishomoto had listed, although he didn't say which one. I believe that it has to be the actual BMW-branded replacement part, not an aftermarket replacement for the PN, like Behr.

He did, however, state that once he took the car out for a drive that it promptly overheated, after which he removed the Mishimoto thermostat, smashed it into pieces, and replaced it with a stock unit.

After that, the car ran fine - in fairness, though, I'm not sure he changed the target temp in the tune.

Regardless, I'm really disappointed that Mishimoto hasn't offered more direct support on this product.

[Route 16]

Originally Posted by WatashiEd

Sorry for bumping an old thread guys, I just bought mine and actually got the same issue.

Emailed ECS but no reply, did you guys end up fitting them ok?

Thanks in advance.

Same issue with mine for an '07 328i. Opened up my t-stat, didn't fit, thought about putting back the original in with the new water pump. I didn't. Bought a new t-stat with plastic housing at autozone. And also figured that since I'm not driving a track car, it was a good move I didn't go Mishimoto. Based on the reviews from e46 forums. Some also went the oem route rather than mishimoto. Car still runs just as good anyway.

[WatashiEd]

I have got the BMW 11537549476 or BMW 11537601158 plastic housing already, problem is they wouldn't fit. There is an electrical connection on the OE thermostat but nothing on the Mishimoto one, also both O-rings that came with the Mishimoto thermostat do not seem to fit in the thermostat housing in my car too.

Far out... and from what I researched online, can't really find anyone who successfully fitted this mishimoto thermostat on a e9x? Seriously!?

Originally Posted by Route 16

Same issue with mine for an '07 328i. Opened up my t-stat, didn't fit, thought about putting back the original in with the new water pump. I didn't. Bought a new t-stat with plastic housing at autozone. And also figured that since I'm not driving a track car, it was a good move I didn't go Mishimoto. Based on the reviews from e46 forums. Some also went the oem route rather than mishimoto. Car still runs just as good anyway.

[Route 16]

Originally Posted by WatashiEd

I have got the BMW 11537549476 or BMW 11537601158 plastic housing already, problem is they wouldn't fit. There is an electrical connection on the OE thermostat but nothing on the Mishimoto one, also both O-rings that came with the Mishimoto thermostat do not seem to fit in the thermostat housing in my car too.

Far out... and from what I researched online, can't really find anyone who successfully fitted this mishimoto thermostat on a e9x? Seriously!?

Me neither.
I originally have the plastic housing, I bought the t-stat that Mishimoto says specifically, if you have the metal or plastic housing. I haven't met anyone that's gone Mishimoto. Stick with an OEM manufacturer for cheaper but same function.

[terryd5150]

This is what the only person I've seen direct feedback from had to say:

"I have spoken to them about 5 times during this process. They first told me it would fit no problem. Pulled the thermostat out of the car MONTHS ago. Of course it didn't fit. They then said it would only fit ONE thermostat, fine threw it in a box for later. This time around, I found the correct thermostat myself, bought it, and got it to fit. Then it doesn't open at the correct temp(IE at all). Yes I gave them every opportunity. If this POS not opening burned up my new motor, the posts are just beginning."

T. Vargas
8/10/15
B!mmerb**st.com

[TrollToll]

So basically there are no reviews from anyone credible.

[terryd5150]

Originally Posted by Yournamehere90

So basically there are no reviews from anyone credible.

Well, so far, Tony's the only one I've seen say he got it to even fit into a thermostat housing.

I've not seen anyone that has said they used the product, it fit, and functions as intended.

I can understand you challenging Tony's credibility, to some degree, but that isn't the case here.

This is more of a failure of Mishimoto to offer proper customer service & support for their product.

[WatashiEd]

Spoken to Chris from ECS, top bloke out there, he gave me full refund on the Mishimoto thermostat, imho I think this product is a fail, been researched every single post I can on the internet and talked to everyone I know that is knowledgeable on bimmer, no one seems to be succeed on fitting one which operates as described by Mishimoto...

[3000GT MR]

You know you can change your coolant temp to what ever you want via flash right? Along with lowering the temps at which you receive cautions and warnings etc

[houtan]

Originally Posted by 3000GT MR

You know you can change your coolant temp to what ever you want via flash right? Along with lowering the temps at which you receive cautions and warnings etc

How?

[N54CoupeHP]

Originally Posted by 3000GT MR

You know you can change your coolant temp to what ever you want via flash right? Along with lowering the temps at which you receive cautions and warnings etc

Originally Posted by houtan

How?

How?

[bluemonstr]

MHD has this functionality and it can't be easier than sliding the selector on when you flash.

You can also go in and change the Engine Cooling tables. Really simple. When you do this, if you have an auto - you will also get the benefit of lowering your oil and trans temps too.

[MDORPHN]

Sorry for bumping an old thread, but pondering ways to reduce the coolant temp on my heavily tracked single turbo 1M.

Even if you flash the DME to operate at a lower temp (by running the pump faster), I can't imagine how the coolant temp could be less than the temp (97 C/207 F) at which the thermostat supposedly opens.

Or is the stock thermostat itself electronically controlled so that it can be set to open at a lower temp?

Neil

[Jeff@TopGearSolutions]

Originally Posted by MDORPHN

Sorry for bumping an old thread, but pondering ways to reduce the coolant temp on my heavily tracked single turbo 1M.

Even if you flash the DME to operate at a lower temp (by running the pump faster), I can't imagine how the coolant temp could be less than the temp (97 C/207 F) at which the thermostat supposedly opens.

Or is the stock thermostat itself electronically controlled so that it can be set to open at a lower temp?

Neil

MHD can target as low as 185F. A better radiator such as CSF will make it easier on your water pump to reach lower targets compared to OEM.

[svitvitskiy]

Originally Posted by MDORPHN

Even if you flash the DME to operate at a lower temp (by running the pump faster), I can't imagine how the coolant temp could be less than the temp (97 C/207 F) at which the thermostat supposedly opens.

Or is the stock thermostat itself electronically controlled so that it can be set to open at a lower temp?

For anyone who is still wondering, this is the quote from BMW TIS regarding the electronically operated thermostat:

The wax element of the characteristic map thermostat contains a heater resistor. The Digital Engine Electronics (DME) supplies the heater resistor with current. This causes the wax element to expand and close the cylinder head inlet against the spring pressure of a spring. The spring has the task of pressing the characteristic map thermostat back into its rest position when the wax element cools down. With the engine cold, the coolant circuit runs via the cylinder head inlet and characteristic map thermostat to the return line towards the coolant pump.

The Digital Engine Electronics (DME) activate the heating element via a characteristic map depending on the current driving situation.

So yes, DME controls the opening of the thermostat by artificially heating up the wax to open sooner.

And yes Mishimoto thermostat is not only useless but harmful, because it prevents the precision temperature control from the DME.

Please refer to the picture above, the unit on the left is OEM thermostat and on the right is Mishimoto. You can see how the OEM unit has 2 prongs for the electical + and - for the heater. The + goes directly to Terminal 30 and the - is controlled by the MOSFET inside of the DME. The Mishimito on the other hand lacks any such feature.

So the answer is obvious, to lower engine temps one should use a custom tune (map).