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M2 Technical Topics > S55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > Coolant level monitoring

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      04-05-2019, 06:19 AM   #1
GoHerd
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Coolant level monitoring

Have 500 miles on the car and have checked the coolant level several times.

It wasn't much above the min when I brought it home.
It is currently below the min level. Barely.

We have a 2018 540 that has approx 12K miles and I've had to add coolant to get it above min twice.

Has anyone received a low coolant warning on the S55 or noticed a drop in level?
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      04-05-2019, 11:04 AM   #2
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There are 2 coolant reservoirs just FYI. One for the engine and one for the intercooler. When I took delivery of the car, my intercooler coolant level was at the max level but my engine coolant was slightly above the min level. I filled it up with oem BMW coolant and have been monitoring both coolant levels weekly for the past 3 months. After about 5000 miles and 2 track days, they are still at the max level, not even a slight bit of drop.
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      04-05-2019, 01:21 PM   #3
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Quote:
Originally Posted by cntzl View Post
There are 2 coolant reservoirs just FYI. One for the engine and one for the intercooler. When I took delivery of the car, my intercooler coolant level was at the max level but my engine coolant was slightly above the min level. I filled it up with oem BMW coolant and have been monitoring both coolant levels weekly for the past 3 months. After about 5000 miles and 2 track days, they are still at the max level, not even a slight bit of drop.
Right and it's a pain in the ass to check that charge air coolant level.
The level on that looks fine.

It's a weird deal. Never had to add coolant to newerish car.
I've had to add it twice on the 540.
Hoping the M2C was shipped low and stays where it's at.
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      04-05-2019, 04:02 PM   #4
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My main coolant level was well below minimum after 2000 mile. I hadn't checked it from new.

Topped up and not dropped since then.

Intercooler level is spot on max. Awkward to see, I use phone camera to take a picture in the reservoir, makes it easier to see.
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