Clutch master cylinders
Discussion
When using an aftermarket clutch master cylinder, with a remote reservoir ( girling, 0.75" ), is there a correct, or more importantly incorrect mounting position.
Virtually all pics I have seen, mount the cylinder horizontally.
On my car before I bought it, the pedal assembly had been modified to accept the master cylinder, but it is mounted, upside down. With the pedal acting downwards on the master cylinder rod. The reservoir connects to the bottom, with the pressure line at the top ( half way up MC ) The connections are correct.
The clutch has always worked though when using the rover engine.
But, the initial inch or so of pedal travel was always very vague, although it doesnt really feel like air.
I am in the middle of trying to get the clutch to work on my LS1 engine/box, and this vagueness is very annoying, and I would like to get rid of it if possible.
Could there be air in the system, that is impossible to bleed out, due to the mounting position of the MC ?
Would you agree, there should be no vagueness at the start of the pedal, like I am having ? Previously, while the vagueness was there, the slave cylinder did seem to move, even on the smallest pedal movement.
Virtually all pics I have seen, mount the cylinder horizontally.
On my car before I bought it, the pedal assembly had been modified to accept the master cylinder, but it is mounted, upside down. With the pedal acting downwards on the master cylinder rod. The reservoir connects to the bottom, with the pressure line at the top ( half way up MC ) The connections are correct.
The clutch has always worked though when using the rover engine.
But, the initial inch or so of pedal travel was always very vague, although it doesnt really feel like air.
I am in the middle of trying to get the clutch to work on my LS1 engine/box, and this vagueness is very annoying, and I would like to get rid of it if possible.
Could there be air in the system, that is impossible to bleed out, due to the mounting position of the MC ?
Would you agree, there should be no vagueness at the start of the pedal, like I am having ? Previously, while the vagueness was there, the slave cylinder did seem to move, even on the smallest pedal movement.
No question, you have air in the system that may be impossible to get out.
You should have a small amount of dead travel as the inlet port from the reservoir is closed and the piston can then start to pump, but this is relatively minute.
Having seen a lot of cars I can say that not every factory designer gets it right either.
You should have a small amount of dead travel as the inlet port from the reservoir is closed and the piston can then start to pump, but this is relatively minute.
Having seen a lot of cars I can say that not every factory designer gets it right either.
Hi ya steve, i just to reply to this one after spending a whole weekend in a temper bleeding the clutch on my bm, i have just fitted my v8 in there and my master cylinder is upside down from the factory and just couldnt get a pedal, in the end i had an idea to push the fluid backwards from the slave cylinder and hey presto it works!!! get as good a pedal as you can then take the slave off and push the piston back as far as it will go and just watch that pesky air come back out the master!! good luck
I'd have thought if BM have fitted it like that at the factory, then the master cylinder would be desinged accordingly ??.
Anyways... I removed the master cylinder, held it in the correct position, and bled it ( at least to the quick release coupling anyway )
Air is now gone, so hopefully all should be well once connected to the slave.
I always hated the pedal, but just assumed it was like that, as no matter what way I bled it, it was always the same, but the clutch worked fine...
Anyways... I removed the master cylinder, held it in the correct position, and bled it ( at least to the quick release coupling anyway )
Air is now gone, so hopefully all should be well once connected to the slave.
I always hated the pedal, but just assumed it was like that, as no matter what way I bled it, it was always the same, but the clutch worked fine...
Gassing Station | Engines & Drivetrain | Top of Page | What's New | My Stuff