TAC Tech => Mechanical => Topic started by: NITEBIRD on July 08, 2023, 04:57:02 PM

Title: Small brake fluid leak between my master cylinder & power brake booster.
Post by: NITEBIRD on July 08, 2023, 04:57:02 PM
I was getting ready to drive my car (1979 TA/SE 4spd) and decided to check my brake fluid since I dont drive the car very often. I noticed that the rear bowl of the master cylinder was very low. I did some more looking around and I noticed that there is a small leak between the master cylinder and power brake booster.

Anybody know what might cause this? Would it be a bad master cylinder or something wrong with the booster.

Approximately 8 years ago I installed a new master cylinder and had the brake booster rebuilt by Booster Dewey.

I know all parts fail at some point but I just want to know if somebody else had something like this happen and what the cause of it was so i can fix it.

Any input is welcome and thanks!
Title: Re: Small brake fluid leak between my master cylinder & power brake booster.
Post by: aussieta on July 08, 2023, 08:22:58 PM
master cylinder leaking
standard booster only ever contains air
hydroboost will contain oil
Title: Re: Small brake fluid leak between my master cylinder & power brake booster.
Post by: Wallington on July 08, 2023, 08:54:03 PM
It's also the cheapest and easiest option to replace.
Title: Re: Small brake fluid leak between my master cylinder & power brake booster.
Post by: langss on July 08, 2023, 09:14:54 PM
I had the same thing on my 86TA... Helps to have a "Bench Vice" to "Bench Bleed", but can be done with a big C clamp on a bench. If your careful, you can  switch them without bleeding the whole system. You Just Have To Be Speedy And Have A Helper.