Slave cylinder rod length
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From: Down the Jersey Shore
Slave cylinder rod length
I replaced my Brake master cyl, clutch master cyl, dread blue hose and my slave cylinder and I think I have an engagement problem. It feels like the clutch is not fully engaged. The slave cylinder I used was for a 83-86, my car is an 1980. Are the rod lengths different and can I change the rod without disconnecting the slave from the hydraulic line?
Thanks Peter
Thanks Peter
Rest in Peace
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From: Bird lover in Sharpsburg
I replaced my Brake master cyl, clutch master cyl, dread blue hose and my slave cylinder and I think I have an engagement problem. It feels like the clutch is not fully engaged. The slave cylinder I used was for a 83-86, my car is an 1980. Are the rod lengths different and can I change the rod without disconnecting the slave from the hydraulic line?
Thanks Peter
Thanks Peter
Thread Starter
Intermediate
Joined: Aug 2009
Posts: 32
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From: Down the Jersey Shore
I replaced my Brake master cyl, clutch master cyl, dread blue hose and my slave cylinder and I think I have an engagement problem. It feels like the clutch is not fully engaged. The slave cylinder I used was for a 83-86, my car is an 1980. Are the rod lengths different and can I change the rod without disconnecting the slave from the hydraulic line?
Thanks Peter
Thanks Peter
Rest in Peace
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From: Bird lover in Sharpsburg
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From: Friday Harbor, WA
Peter,
There are at least two different rod lengths for clutch-slaves. The rod for a S4 (single disc) clutch is 154mm (overall length), and the dual-disc rod is shorter-- I will pull it this afternoon and measure it.
The hard-line on the clutch slave is trapped by the starter, if you remove the clip that attaches it to the bracket on the driver's side of the oil pan then you may be able to get the slave out without disconnecting anything. (You will probably need to grab the rod with long-nose pliers and shove it back into the cylinder in order to get it out of the housing).
The hot setup is to get a new clutch hose from Greg Brown and route it around the front of the starter. That avoids the trapped-hardline problem and makes removing both starter and clutch-slave much simpler. I'll post a picture this afternoon.
Cheers, Jim
There are at least two different rod lengths for clutch-slaves. The rod for a S4 (single disc) clutch is 154mm (overall length), and the dual-disc rod is shorter-- I will pull it this afternoon and measure it.
The hard-line on the clutch slave is trapped by the starter, if you remove the clip that attaches it to the bracket on the driver's side of the oil pan then you may be able to get the slave out without disconnecting anything. (You will probably need to grab the rod with long-nose pliers and shove it back into the cylinder in order to get it out of the housing).
The hot setup is to get a new clutch hose from Greg Brown and route it around the front of the starter. That avoids the trapped-hardline problem and makes removing both starter and clutch-slave much simpler. I'll post a picture this afternoon.
Cheers, Jim
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Thread Starter
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From: Down the Jersey Shore
Thanks guys, I re-ran all my lines, hard and soft, never had the pesky bracket. The final I had to order from Germany and it was wrong (naturally) so I bent it by hand and shortened it. I have a dual disk clutch and the rod feels like it wants to be shorter. So before I start grinding I thought I'd ask the experts!
The hot leads for the starter are nicely exposed down there! watch out!
Other project today was reinstalling my "perfect" pod. I replaced the circuit board, broke two of the connectors, fixed them (gorilla glue) and rebroke two on upon final install. Everything works, mostly, so WTF! Can't wait to drive this sucker, it's been years.
Wow, That's alot almost 5/8"
The hot leads for the starter are nicely exposed down there! watch out!
Other project today was reinstalling my "perfect" pod. I replaced the circuit board, broke two of the connectors, fixed them (gorilla glue) and rebroke two on upon final install. Everything works, mostly, so WTF! Can't wait to drive this sucker, it's been years.
Wow, That's alot almost 5/8"
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Race Car
Joined: Dec 2003
Posts: 4,477
Likes: 5
From: Atlanta, GA
Ok, so to double-check:
- The long rod is 154mm
- The short rod is 138.56mm
Is this correct? Are the internals of both the short and long cylinders the same so the rod is the only difference?
Dan
'91 928GT S/C
475hp/460lb.ft
- The long rod is 154mm
- The short rod is 138.56mm
Is this correct? Are the internals of both the short and long cylinders the same so the rod is the only difference?
Dan
'91 928GT S/C
475hp/460lb.ft
Race Car
Joined: Dec 2003
Posts: 4,477
Likes: 5
From: Atlanta, GA
Peter,
There are at least two different rod lengths for clutch-slaves. The rod for a S4 (single disc) clutch is 154mm (overall length), and the dual-disc rod is shorter-- I will pull it this afternoon and measure it.
The hard-line on the clutch slave is trapped by the starter, if you remove the clip that attaches it to the bracket on the driver's side of the oil pan then you may be able to get the slave out without disconnecting anything. (You will probably need to grab the rod with long-nose pliers and shove it back into the cylinder in order to get it out of the housing).
The hot setup is to get a new clutch hose from Greg Brown and route it around the front of the starter. That avoids the trapped-hardline problem and makes removing both starter and clutch-slave much simpler. I'll post a picture this afternoon.
Cheers, Jim
There are at least two different rod lengths for clutch-slaves. The rod for a S4 (single disc) clutch is 154mm (overall length), and the dual-disc rod is shorter-- I will pull it this afternoon and measure it.
The hard-line on the clutch slave is trapped by the starter, if you remove the clip that attaches it to the bracket on the driver's side of the oil pan then you may be able to get the slave out without disconnecting anything. (You will probably need to grab the rod with long-nose pliers and shove it back into the cylinder in order to get it out of the housing).
The hot setup is to get a new clutch hose from Greg Brown and route it around the front of the starter. That avoids the trapped-hardline problem and makes removing both starter and clutch-slave much simpler. I'll post a picture this afternoon.
Cheers, Jim
Dan
'91 928GT S/C
475hp/460lb.ft
Rest in Peace
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From: Bird lover in Sharpsburg
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From: Atlanta, GA
I can, but that won't be very useful. I am not sure if the cylinder bodies are the same and also don't know if both cylinders allow the rod to be pushed in the same distance. Maybe I'll just get an older cylinder and stick it in there.
Dan
'91 928GT S/C 475hp/460lb.ft
Dan
'91 928GT S/C
475hp/460lb.ft
Rest in Peace
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From: Bird lover in Sharpsburg
It worked on at least one, just changing the rod.
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From: Friday Harbor, WA
Cheers, Jim
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I went through this with my '81. What I found was the new master cylinder diameter was smaller (not by much) than the old one and it could not displace enough fluid to actuate the slave cylinder.
I had to rebuild the original master and re-install. It worked fine after that.
I had to rebuild the original master and re-install. It worked fine after that.