[Spridgets] brake fluid question

[ryan.kubanoff at comcast.net]

Jim 
The fluid is synthetic not silicone. it is castrol GT LMA. My next question is how long to drain and how much time and volume to refill. As for the leak my break pedal shaft is wet and I see no other leaks anywhere else. 
ryan 

----- Original Message ----- 
From: "Jim Johnson" <bmwwxman at gmail.com> 
To: "ryan kubanoff" <ryan.kubanoff at comcast.net>, "Spridget list" <spridgets at autox.team.net> 
Sent: Sunday, April 12, 2009 5:33:06 PM GMT -05:00 US/Canada Eastern 
Subject: Re: [Spridgets] brake fluid question 

Ryan, 

I would definitely drain the system and refill with fresh brake fluid. I believe you can use either DOT3 or DOT4. I use DOT3 in both clutch and brakes. Hydraulic fluids should be changed regularly anyway. They are hygroscopic meaning they absorb moisture from the air which contaminates them an eventually will damage parts of the system from the inside. DOT3 and DOT4 should be readily available just about anywhere. WalMart has it. 

Are you sure its your master that is leaking and not one of the wheel cylinders? 

Cheers!! 
Jim 


On Sun, Apr 12, 2009 at 4:07 PM, < ryan.kubanoff at comcast.net > wrote: 


I have a 74 with a bad master cylinder thats going to be replaced tomorrow. But now the question is brake fluid and what to use. I presume that the system has original or older DOT4 although last month when i noticed the leak in the resevoir i topped it off with 20ml of DOT3 (i didn't know any better). Today when I went to pepboys for a quart of DOT4 all they have is the castrol synthetic slm that "meets or exceeds DOT3 and DOT4 standards". now i have not seen any more leaking in the past 2 months so i am thinking that my DOT3 addition is still in the master resvoir but? 

Advice needed. do i drain the whole system and refill with the new castol stuff, do i drain just the master and refill with the new castrol, or some other suggestion. 
Thanks 
ryan