Will a larger diameter master cylinder help my clutch disengage?

Question

My clutch is not disengaging. My current master cylinder has a 5/8" bore diameter and my slave cylinder has a 3/4" bore. My understanding is the master should be larger than the slave to push more fluid to the slave. Correct me if I'm wrong there. I can get an aftermarket master cylinder in either 3/4" or 1" diameter. Would this help or hurt the clutch disengagement?

Answer 1

Have the clutch pedal free play adjusted. If that's OK and you have a good master and slave cylinder then the problem is in the clutch itself. If you put a larger master in you'll just blow the slave piston out and achieve nothing.

Answer 2

Hi, try bleeding it at the slave. if that works for a little bit you have a leak and air is betting into the lines.. You might try and see if there is an adjustment at the slave cylinder rod to clutch fork.

good luck

tim

Answer 3

One of your cylinders is defective. The only thing a cylinder size will affect is the distance and amount of pressure you have to apply to disengage it. I think the fluid is not pushing the slave cylinder.

Answer 4

Master cylinder isnt the only thing that aids in keeping the clutch from engaging or touching. You have springs on the shifter fork, you have the pressure plate that aids in pushing & the master cylinder helps as well

Answer 5

Larger bore size pushes a greater volume of fluid through the same size lines - result will be a shorter stroke but will require greater force to move the slave piston . A smaller bore requires less force but longer stroke to move the slave. Newness may make it only slightly stiffer than before.

Answer 6

The size is already correct. Your slave cylinder may have a problem. Bleed the system, according to the manufacturers recommended procedure.

Answer 7

I GUARANTEE the diameter of the master cylinder is NOT related to the problem.