Possible slave cylinder problem
Thread Starter
jobberone
Joined: Aug 2003
Posts: 2,062
Likes: 8
From: Kailua Kona HI
The system is not vented. If you remove your cap you will find a rubber diaphragm that expands as the fluid level drops. The diaphragm seals off the system from outside air and prevents an air gap on top of the fluid level. The vent in the cap is there to allow the diaphragm to expand. If you were going to get water from condensation, it would gather in the diaphragm but never come in contact with the hydraulic fluid.
Melting Slicks
Joined: Feb 2007
Posts: 3,266
Likes: 8
From: Indian Rocks Beach FL
St. Jude Donor '08-'09-'10
The system does operate under vacuum. Every time you push the clutch pedal fluid is forced from the reservoir into the slave cylinder lowering the fluid level in the reservoir. The diaphragm is drawn down by vacuum to prevent an air space as would occur in a vented system. The upper side of the diaphragm is vented to allow the movement but the system remains sealed from outside air.
When you install the diaphragm it displaces the air in the reservoir. Take yours out and look at it. You will see that the reservoir side is completely wet with hydraulic fluid. If it is not you need to fill the system, the fluid level is low.
When you install the diaphragm it displaces the air in the reservoir. Take yours out and look at it. You will see that the reservoir side is completely wet with hydraulic fluid. If it is not you need to fill the system, the fluid level is low.
Racer
Joined: Aug 2003
Posts: 327
Likes: 0
From: Metamora IL
Not a bad idea to update the hydraulics either way. For ease of access the master is behind the front wheel well, but most likely its the slave and or the pilot bearing. When I munched my bearing it grinded in and out of gear all kinds of weirdness. Learned my lesson to ALWAYS put in a pilot when the car is apart.
Racer
Joined: Aug 2003
Posts: 327
Likes: 0
From: Metamora IL
Thread Starter
jobberone
Joined: Aug 2003
Posts: 2,062
Likes: 8
From: Kailua Kona HI
The system does operate under vacuum. Every time you push the clutch pedal fluid is forced from the reservoir into the slave cylinder lowering the fluid level in the reservoir. The diaphragm is drawn down by vacuum to prevent an air space as would occur in a vented system. The upper side of the diaphragm is vented to allow the movement but the system remains sealed from outside air.
When you install the diaphragm it displaces the air in the reservoir. Take yours out and look at it. You will see that the reservoir side is completely wet with hydraulic fluid. If it is not you need to fill the system, the fluid level is low.
When you install the diaphragm it displaces the air in the reservoir. Take yours out and look at it. You will see that the reservoir side is completely wet with hydraulic fluid. If it is not you need to fill the system, the fluid level is low.
Thread Starter
jobberone
Joined: Aug 2003
Posts: 2,062
Likes: 8
From: Kailua Kona HI
Not a bad idea to update the hydraulics either way. For ease of access the master is behind the front wheel well, but most likely its the slave and or the pilot bearing. When I munched my bearing it grinded in and out of gear all kinds of weirdness. Learned my lesson to ALWAYS put in a pilot when the car is apart.
I bought a pilot bearing with the slave. Thanks for all the kind responses all. We're half way through getting to the slave. We're having loads of fun, my son and I.
