EXPERT IN AUTO PARTS
19 May 2023 Table of content
We all know where the clutch is located but what about the clutch master cylinder? You can find it directly connected to the foot pedal. Its main function is to produce hydraulic pressure for the clutch system. This pressure is produced when the driver steps on the clutch pedal. Hydraulic pressure from the main cylinder flows to the slave cylinder to disengage the clutch from the engine when the pedal is pressed. When the clutch master cylinder is not functioning properly, hydraulic pressure will not build up and the slave cylinder will not receive enough pressure to force its piston outward against the clutch fork to disengage it from the engine.
In a hydraulic clutch system, the master cylinder is the component responsible for creating enough oil pressure to transmit the force from the clutch pedal to the clutch, causing it to disengage from the engine.
The clutch master cylinder is connected to the clutch pedal via a push rod and can typically be accessed from inside the engine bay. You should find it next to the brake master cylinder on the car’s bulkhead.
First of all, how does a clutch master cylinder work? It starts working as soon as the driver presses down on the clutch pedal, converting the mechanical force into hydraulic pressure through compression. It then transfers this pressure by forcing the hydraulic fluid through the hoses to the slave cylinder. This secondary cylinder disengages the mechanism by moving the clutch fork, actuating the release bearing.
LuK Clutch slave cylinder
Article number: 512 0021 10
£ 20,72
price incl. 20% VAT, excl. delivery costs
Article number: 511 0307 10
£ 102,47
price incl. 20% VAT, excl. delivery costs
Article number: 513 0026 10
£ 59,02
price incl. 20% VAT, excl. delivery costs
BREMBO Master Cylinder, clutch
Article number: C 85 020
£ 35,31
price incl. 20% VAT, excl. delivery costs
-62%
Article number: 6283 600 538
compared to
RRP
£ 111,34
£ 41,97
price incl. 20% VAT, excl. delivery costs
Here’s how to tell if your clutch master cylinder is bad:
Unfortunately, a defective master cylinder can cause your car to have a variety of issues. You may have difficulty shifting gears. This is due to the lack of hydraulic pressure in the system.
The master cylinder is supposed to produce hydraulic pressure for the clutch system components to work properly. When there is a lack of pressure, the driver may find themselves forcing gears which then cause a grinding noise. One of the most common symptoms of a failing master cylinder is leaks. The cylinder consists of a piston, a rubber cup that acts as a leak-proof seal between the cylinder wall and piston. If there is a leak, this usually indicates that the seal is worn. Make sure to check for fluid leaks around the master cylinder, firewall, and floor. When the master cylinder is malfunctioning, you may notice that it is extremely easy to step on the pedal and the pedal may also feel “spongy”. This is usually caused by the loss of hydraulic pressure and air coming into the system causing a spongy feel when the pedal is engaged.
You may also notice that the clutch pedal doesn’t spring back up after you step on it. When this happens, the clutch will not disengage. When the master cylinder is failing, you will notice a change in the fluid levels in the reservoir. The fluid level in the reservoir will climb higher when you step on the clutch pedal and levels will lower when the pedal is released. Dirty or contaminated fluid can also be a cause for the CMC to fail, as condensation can enter the reservoir and contaminate the fluid. This will decrease the function of the fluid and over time it will become dark in colour, signalling that the seal is wearing out. Noise is a common issue. When the CMC is failing, it will directly affect clutch operation. You may notice some unusual creaking or squeaking noises when shifting or stepping on the pedal.
In the case that you are having trouble with the clutch, it might be time for a complete CMC replacement. The Clutch master cylinder price will differ and depend on the make and model of your car. If you are the proud owner of a Ford Focus, you can replace the CMC with a Ford Focus clutch master cylinder at an affordable price. It’s good to keep in mind you may not save much in terms of time, but a great deal in terms of money if you decide to do this yourself. If you are unsure that you are able to do this on your own, we recommend going ahead and investing in a professional mechanic, since it is a complicated process. Be sure to budget for this, as the labour costs can be quite steep.
If the clutch master cylinder isn’t working properly, the system won’t be able to transfer enough pressure to disengage and engage the clutch itself, which means you’ll no longer be able to switch between gears easily. In fact, you could end up losing control over the vehicle entirely. In short, it is strongly advised against.
To diagnose the clutch master cylinder, you should first check for visual signs of leaks, corrosion, and damage to the hoses or cylinder housing. Next, make sure the clutch fluid is between the min and max marks on the side of the tank.
Lastly, conduct a pressure test by attaching a pressure gauge to the fluid line and pressing the clutch pedal several times. The pressure should increase and drop accordingly. If the pressure is too low or abnormal, you may need a replacement.
Article number: 2100623
£ 96,13
price incl. 20% VAT, excl. delivery costs
-35%
SACHS Master Cylinder, clutch
with sensor
Article number: 6284 600 748
compared to
RRP
£ 122,20
£ 78,59
price incl. 20% VAT, excl. delivery costs
-62%
Article number: PNB959
compared to
RRP
£ 43,23
£ 16,31
price incl. 20% VAT, excl. delivery costs
BREMBO Clutch slave cylinder
Article number: E 30 016
£ 20,97
price incl. 20% VAT, excl. delivery costs
-38%
FEBI BILSTEIN Master Cylinder, clutch
Article number: 103649
compared to
RRP
£ 91,99
£ 57,01
price incl. 20% VAT, excl. delivery costs
We all know that an ounce of prevention is worth a pound of cure, or in this case, pounds (£). If your CMC malfunctions, you could end up stranded in the middle of nowhere. Just a few preventative measures can keep this from occurring. Always check your fluid levels and bleed the car’s system, this will keep your seals pliable. Don’t miss your regular maintenance and inspection appointments and make sure all parts are lubricated and the worn ones replaced. (Don’t skimp on cheap lubricants and components). This is also the time to ensure that your clutch pedal is correctly adjusted.
A proper driving style, avoiding hard braking or acceleration will also help keep your master cylinder in good shape and you safe on the road.
The average cost of a clutch master cylinder replacement in the UK is roughly £200, however, prices can range between £140 and £450 based on the location and vehicle model. If you repair the vehicle yourself, you may save some cash. Aftermarket clutch kit prices range between £95 and £600.
The price of the part itself will depend on the manufacturer and retailer, as well as the specific requirements of the vehicle itself. For example, a master cylinder for a Range Rover may cost more than that for a Honda.
The quality and prices also vary significantly between brands. For example, prices for an OE-quality Brembo clutch master cylinder are in the mid segment at £30 to £130, whereas premium branded parts can cost up to £500.
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