Another clutch master/ slave question
Thread Starter
Pro
Joined: Feb 2004
Posts: 723
Likes: 0
From: Nashville Tennessee
Another clutch master/ slave question
I have been losing pressure in the clutch system lately and cannot find a leak. The first time the res. got low, I filled it and it self blead back to full pressure, but now it continues to lose pressure. The slave was replaced by the original owner last year as were the lines and it still looks new and dry as a bone, (he is a GM brake engineer). When I opened the master last time to check it, it was a little low and the black rubber dust cover was all wadded up in there. It had lost it's shape. Also, I pulled most of the fluid out of the master with a syringe and it is full of black debris. Could this be rubber from worn seals or the dust cover? There is not any visible fluid leak that I can find, but, even with a light it is hard to see under the master. Any suggestions? It's a '92 LT-1 ZF 6-Speed. Thanks in advance -Michael
Melting Slicks
Joined: Jul 2003
Posts: 2,140
Likes: 0
From: Cincinnati Ohio
Check the inside... Stick your head up in the drivers footwell and follow the clutch pedal to where it goes through the firewall, then peel back the carpet and pad.. When the master goes bad it will seep into the cockpit and soak into the carpet and pad.... With no outside signs of a leak 
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
The bladders in both master cylinders expand out when fluid level drops. This insures that air and moisture isn't drawn in to the reservoirs.
That black crap in your clutch master is aluminum rust and clutch dust.
That black crap in your clutch master is aluminum rust and clutch dust.
