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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 > Which coolant in which tank
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      01-21-2022, 01:47 PM   #1
roberto811
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Which coolant in which tank

2017 440i has two coolant reservoirs.
I need to top off both.
At the dealer parts counter the guy told me to put blue in the engine coolant reservoir and the green HT-12 in the intercooler reservoir.

Could someone provide info on which coolant should go in which.
The user manual ive found only talks about the engine coolant.
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      01-21-2022, 02:56 PM   #2
thejeremyman9
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If you know which one is the coolant reservoir per the manual, then the other one is the IC?
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      01-21-2022, 03:33 PM   #3
roberto811
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Quote:
Originally Posted by thejeremyman9 View Post
If you know which one is the coolant reservoir per the manual, then the other one is the IC?
Yes, do they both use the same type of coolant or does the IC need the HT-12 green coolant. The manual doesn't say anything about coolant type.
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      01-31-2022, 01:43 PM   #4
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Quote:
Originally Posted by roberto811 View Post
Yes, do they both use the same type of coolant or does the IC need the HT-12 green coolant. The manual doesn't say anything about coolant type.
They both use the same coolant (blue).
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