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The mkiv Supra Owners Club

Brake Fluid help


xeno
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My malfunction light comes on/off from time to time, and I noticed that the brake fluid is low.

 

On the reservoir cap it says to use DOT 3 fluid.

I have some DOT 4 fluid that says it's suitable to use as DOT 3 or 4 replacement, and that it is safe to mix with other fluids as long as they are not silicone based.

 

How the hell would I know if the stuff in there at present is silicone based? :search:

Don't tell me I'm gonna have to drain the brakes completely. :(

What's the worst that could happen?

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The probabilty is that it's not silicone based (dot 5) unless some idiot has put some in, just put the dot 4 stuff in and you'll be okay.

 

 

There are basically two types of fluid:

 

1. Glycol based

 

2. Silicone based

 

Glycol based fluids can strip paintwork where as silicone based do not.

 

Try putting a little on the front wing and see if it's strips the paint.:D

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Glycol based fluids can strip paintwork where as silicone based do not.

 

Try putting a little on the front wing and see if it's strips the paint.:D

 

 

Great. I'll try a bit on the paint of the missus' car, in an inconspicuous area.:D It's a pile of turd anyway.

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