Replacing thermostat and sensor

MikeyDawg · 01-10-2020, 07:50 PM

Was reading through the DIY thread on replacing the thermostat and sensor and seemed straight forward except for one aspect.

A popular approach to the project was to pump all of the coolant from the reservoir before replacing the thermostat to prevent a mess when pulling the t-stat housing.

Should I plan on reusing that coolant and adding it back post install? Or buying more then came in the kit.

I know it's kinda a dumb question but I bought the ecs kit for the job and it only came with a quart of coolant. Not nearly enough to replace the amount people were saying they pumped from the reservoir.

Any help on the right way to approach this would be appreciated. Was gonna start the job tonight and opened the ECS box and realized I may need more coolant.

Denny347 · 01-10-2020, 08:18 PM

Is it a quart of concentrated coolant or pre-mixed? If the coolant looks good, re-use it if what you bought isn't enough. Save it in a clean container.

Denny347 · 01-10-2020, 08:22 PM

Looking at ECS, I think it needs 50/50 diluted. So 2l of coolant might be enough.

MikeyDawg · 01-10-2020, 08:33 PM

Quote:

Originally Posted by Denny347

Looking at ECS, I think it needs 50/50 diluted. So 2l of coolant might be enough.

Yea, it seems to require a 50/50 mix... but I guess part of me started to wonder if it was a bad practice to reuse the coolant.

Is it true that the coolant doesn't need to be flushed assuming it doesn't get contaminated?

01-10-2020, 07:50 PM	#1
MikeyDawg Second Lieutenant 210 Rep 231 Posts Drives: 2009 E90 - MT Join Date: Oct 2018 Location: GA iTrader: (1)	Replacing thermostat and sensor - question... Was reading through the DIY thread on replacing the thermostat and sensor and seemed straight forward except for one aspect. A popular approach to the project was to pump all of the coolant from the reservoir before replacing the thermostat to prevent a mess when pulling the t-stat housing. Should I plan on reusing that coolant and adding it back post install? Or buying more then came in the kit. I know it's kinda a dumb question but I bought the ecs kit for the job and it only came with a quart of coolant. Not nearly enough to replace the amount people were saying they pumped from the reservoir. Any help on the right way to approach this would be appreciated. Was gonna start the job tonight and opened the ECS box and realized I may need more coolant.
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01-10-2020, 08:18 PM	#2
Denny347 Major 347 Rep 1,076 Posts Drives: 2008 M3 E90 Join Date: Aug 2010 Location: Indianapolis, IN iTrader: (0)	Is it a quart of concentrated coolant or pre-mixed? If the coolant looks good, re-use it if what you bought isn't enough. Save it in a clean container.
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01-10-2020, 08:22 PM	#3
Denny347 Major 347 Rep 1,076 Posts Drives: 2008 M3 E90 Join Date: Aug 2010 Location: Indianapolis, IN iTrader: (0)	Looking at ECS, I think it needs 50/50 diluted. So 2l of coolant might be enough.
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