W211 AMG Discuss the W211 AMG's such as the E55 and the E63

Thermostat question

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Old Dec 29, 2018 | 08:31 AM
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Thermostat question

This may sound like a stupid question,but I searched and couldn’t find a definitive answer..Can anyone tell me if the thermostat housing and thermostat are 1 piece built into each other permanently?.Seems like all the images I’ve seen are of them being sold together as 1 unit..Or do they separate into 2 separate pieces like most assembly’s?..I’m asking because I will be installing a low temp thermostat this weekend and it came as thermostat only..What I’m hoping for is that the stocker separates from its housing.Can anyone confirm?..M113K by the way..Thanks..
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Old Dec 29, 2018 | 12:54 PM
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The MB replacements I've seen came in one piece but the thermostat can be removed from the housing by pushing down and turning out of the two "ear" slots. It takes some force to do so though. If your aftermarket low temp thermostat doesn't fit all of the way down in it's spindle hole you may need to drill out your thermostat housing spindle hole a little deeper for it to seat properly. I had to do this on one of the low thermostats and it worked fine after. I think it was from Mishimoto.
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Old Dec 29, 2018 | 01:44 PM
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Originally Posted by mbmg
The MB replacements I've seen came in one piece but the thermostat can be removed from the housing by pushing down and turning out of the two "ear" slots. It takes some force to do so though. If your aftermarket low temp thermostat doesn't fit all of the way down in it's spindle hole you may need to drill out your thermostat housing spindle hole a little deeper for it to seat properly. I had to do this on one of the low thermostats and it worked fine after. I think it was from Mishimoto.

Yes..Mishimoto it is...Didn’t want to have to make a dealer or store run once taken apart and would rather be prepared..I will have metal drill bits nearby incase I need to modify the housing...Thanks for the answer brother..Greatly appreciated...
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Old Dec 29, 2018 | 01:56 PM
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I found a few photos I took that better show the difference.



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Old Dec 29, 2018 | 02:01 PM
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Wow..I see..So Im guessing there is enough material where it may need to be drilled without coming through the housing?Thanks for those pics...Gives me a much better idea of what Im dealing with.You the man...
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Old Dec 29, 2018 | 02:11 PM
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Yes, there is enough material left after drilling. It doesn't take much more to drill there was already some clearance in the hole to begin with. If you can mic/measure it then just go slow and test frequently until it seats.
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Old Dec 29, 2018 | 04:00 PM
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Can the excess tip of the new thermostat be cut off to match the OE one and fit properly?
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Old Dec 29, 2018 | 08:26 PM
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I'm not sure if it would affect function but I think it's an option to cut off part of the end of the moshimoto to match the length of the stock spindle.
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Old Jan 3, 2019 | 03:10 PM
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MBMG—-Just wanted to thank you again.I did the install today and indeed the Mishimoto’s tail was to long for the stock housing as you said.The drilling you suggested worked like a charm..I most likely wouldn’t have thought to do that..Thanks again brother!
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Old Jan 3, 2019 | 03:47 PM
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I'm glad I could help.
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