Skip the auto shop - Our mechanics make house calls

Q: New Slave cylinder installed and the plunger keeps getting dislocated. Doesn't want to go back into the cylinder and the pedal is soft

asked by on

I just replaced the slave cylinder and when I pump the clutch, the plunger pops out if place. I'll force it back into the cylinder and a couple more pumps of the clutch and it pops out again. What am I doing wrong?

My car has 130000 miles.
My car has a manual transmission.

A: Hey there, it sounds as though the hydrauli...

Hey there, it sounds as though the hydraulic pressure is not bleeding back fully when you release the pedal. First you should check the clutch pedal and verify that there is free play when the pedal is released.

There should be almost 1/4 inch of free travel of the pedal before there is any movement of the piston in the master cylinder. If there is not, it could be that the pedal pushrod needs adjusting or that the pedal is not returning all of the way. The other possibility is that there is a restriction in the flexible hose that connects to the slave cylinder. That can cause a pressure build up in the slave. That can only be repaired by replacing the hose. If you still can’t get it working, consider having a professional inspect the clutch so that this can be repaired appropriately.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Clutch making screeching noise. 2013 Audi A8

Hello. It sounds like you either have a failing bearing in the transmission, or more commonly it is a failure in the clutch throw out bearing or pilot bearing. Most of the time, if it makes noise when pressing in...

Q: Steering wheel issues following jump start

Batteries normally self discharge over time. Also, your car's electrical system will draw 20-50 milliamps, roughly, even as the car sits, to power the clock, computer, and security system. Combined, these factors can cause the battery voltage to drop so...

Q: Random severe vibrations on highway

Hi there. It's quite possible that beyond the tire balance causing the vibration you're experiencing. However, it could be very difficult to diagnose the issue; as anytime you drive faster than 75; multiple small issues could create major problems and...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...