M42 coolant

[Beemerdan]

Does the M42 need a special type of coolant? or can I just use the all makes/all models stuff?

Thanks!

[Gerta]

No you need to get the proper coolant or you will develop 'green goo'... Search the forum for the correct type. I personally use BMW coolant only.

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[Balleristic31]

BMW coolant in mine as well. The PO put in standard green and it created a lot of buildup of crap in my cooling system

[TobyB]

Plain green has worked just fine in mine for the last 3 years...

...it's mixing the types that generates the goo.

t

[InNeedOfBoost]

I've been using the blue BMW stuff.

Anyone have any experience using water wetter/distilled water mix? I've run that in almost every car I've owned...but never heard anything as far as using it in the M42's

[roguetoaster]

WW and distilled water should be just fine, we run it in the Chump Car and I run it in my daily in warm weather.

[salvuhdor]

Question for you fellas, I just replaced a the water pump and thermostat along with lots of other things now I am wondering if I should run the car with distilled water first then add after a couple miles drain it and add the BMW coolant I bought for it. Should I be fine? or should I not add the distilled water?

[bmwman91]

Distilled water and regular Prestone green have been fine for me for the 13 years that I have owned M42's. No corrosion or green go. There is nothing exotic about the M42 that calls for fancy coolant.

[bmwm42]

I use zerox g05

[unevolved]

I use the tears of my enemies.

[MF DOOM]

i use tap water.

[SpecM]

i use tap water.

lols

I use g05 in my m20

[InNeedOfBoost]

I use the tears of my enemies.

This literally made me LOL!!

I need to flush mine, the coolant has been in there since I got the car two years ago. Looks like I'll be going the water wetter route...it gets too damn hot in the south!

[Beemerdan]

Question for you fellas, I just replaced a the water pump and thermostat along with lots of other things now I am wondering if I should run the car with distilled water first then add after a couple miles drain it and add the BMW coolant I bought for it. Should I be fine? or should I not add the distilled water?

^good question. is there anything wrong with running it for a few minutes with water in order to flush it out??

also does anybody know how much coolant it takes?

[InNeedOfBoost]

That's usually what I do to flush coolant on any other car I've owned. Never had an issue.

From what I read, the M42's hold just under 2 gallons of coolant minus the overflow. Correct me if I'm wrong though.