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Old 10-23-2019, 03:57 PM
akii akii is offline
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Coolant and Brake Fluid replace

I need to do a coolant and brake fluid flush. Does anyone know how many gallon on the coolant or Brake Fluid I need?
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Old 10-24-2019, 10:06 AM
edycol edycol is offline
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Quote:
Originally Posted by akii View Post
I need to do a coolant and brake fluid flush. Does anyone know how many gallon on the coolant or Brake Fluid I need?


I would get gallon of coolant. As for brake fluid, usually takes a liter to flush it. If you do it yourself, buy 1.5-2ltr as you donít want to run out of fluid during flush.


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Old 10-24-2019, 11:46 AM
akii akii is offline
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They recommend 50/50 mix. 1 Gallon will yield 2 gallons.

Brake fluid came with 12 fl oz. 1 Litter will need about 3 bottles. So 5 bottles will be enough?
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Old 10-24-2019, 12:57 PM
namelessman namelessman is online now
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Originally Posted by akii View Post
They recommend 50/50 mix. 1 Gallon will yield 2 gallons.

Brake fluid came with 12 fl oz. 1 Litter will need about 3 bottles. So 5 bottles will be enough?
Online search says N55 engine has coolant capacity of 10L(10.5 quarts). 1 gallon coolant + 1 gallon water 50/50 is around 8 quarts, but it is likely some coolant will still be trapped in engine block.

My mechanic charged me for 1 liter($10-$12?) of DOT4 for the brake flush, so around 5-6 bottles of 12 fl-oz should be plenty.
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Old 10-25-2019, 07:18 AM
Our BMW Our BMW is offline
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Here's some good info on brake fluids: https://www.fcpeuro.com/products/bmw...id-81220142156
Also if you capture the old, it's lifetime guaranteed.
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Last edited by Our BMW; 10-25-2019 at 07:20 AM.
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Old 10-25-2019, 05:05 PM
John in VA John in VA is offline
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Originally Posted by namelessman View Post
My mechanic charged me for 1 liter($10-$12?) of DOT4 for the brake flush, so around 5-6 bottles of 12 fl-oz should be plenty.
1 liter = 33.814 US fluid oz. One 32 oz. (0.946 liter) bottle of Prestone or Valvoline synthetic DOT 3/4 brake fluid - $6-8 at the big box parts places - will usually do the job, unless you want to pay more for the low-viscosity stuff (like Pentosin DOT 4 LV brake fluid).
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Last edited by John in VA; 10-25-2019 at 05:10 PM.
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Old 10-25-2019, 05:11 PM
namelessman namelessman is online now
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Originally Posted by John in VA View Post
1 liter = 33.814 US fluid oz. One 32 oz. (0.946 liter) bottle of Prestone or Valvoline synthetic DOT 3/4 brake fluid - $6-8 at the big box parts places - will usually do the job, unless you want to pay more for the low-viscosity stuff.
Yes BMW brake fluid is DOT4 low viscosity for $4/12 ounces, local indy uses Pentosin low viscosity, which sells for $50/5L.
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Old 10-28-2019, 07:33 AM
akii akii is offline
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why people use Motul brake fluid? Is it much better than OEM? temperature wise???
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Old 10-28-2019, 06:12 PM
John in VA John in VA is offline
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why people use Motul brake fluid? Is it much better than OEM? temperature wise???
Compare the dry boiling points of the products you're interested in & choose what you prefer.
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