Print Page - Definitive test for brake fluid

Title: Definitive test for brake fluid
Post by: gjz30075 on March 27, 2018, 08:08:46 PM

I'd like to flush the braking system on 2249 just as preventive maintenance thing, but I don't know what kind of brake fluid is in it now.
I pulled a bit out and put it on a painted piece of metal and after several hours, no paint was peeling up. This tells me it MIGHT be
silicone, so I'm just wondering, is there a better litmus test for brake fluid or have I just done it?

Title: Re: Definitive test for brake fluid
Post by: NC TRACKRAT on March 28, 2018, 08:25:32 PM

In all probability, it is silicone. Usually, DOT 3 brake fluid will do a number on paint in short order. Does the brake fluid have a color tint? Light purple? Yellow? Amber? Any chance of checking with the previous owner or mechanic who worked on the car?

Title: Re: Definitive test for brake fluid
Post by: gjz30075 on March 29, 2018, 06:10:48 AM

Stan, it's fairly clear, in color. I can try to contact the previous owner/ shop. That may be my best bet at this point.
Thanks!

Title: Re: Definitive test for brake fluid
Post by: 427gt on March 30, 2018, 02:56:33 PM

if it washes off your finger with water, it isn't silicon

Title: Re: Definitive test for brake fluid
Post by: gjz30075 on March 30, 2018, 03:59:14 PM

Thanks, I'll try that. I also understand there's a difference in specific gravity. I no longer own a battery tester with specific gravity
numbers on it but I'm going to look for one this weekend.

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SAAC Forum => SAAC Forum Discussion Area => Topic started by: gjz30075 on March 27, 2018, 08:08:46 PM