Why is fluid leaking by my clutch?

I have fluid leaking from my clutch and Master cylinder

My car has 279858 miles.
My car has a manual transmission.

Experienced mechanics share their insights in answering this question :
At almost 300,000 miles, it’s not surprising to see some hydraulic leaks. Even with the most meticulous maintenance, the clutch hydraulic components will eventually fail. Most often, the problems show up after the first cold snap of the fall. The rubber in the clutch master and slave cylinder slowly degrades until the fluid can leak past the seals. Weather the Clutch Master or Clutch slave cylinder are leaking, if one is failing the other is not far behind so the best way to a long lasting fix is to replace both parts. If you contact Your Mechanic, they can send a technician to do the job right there at your home or office.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Causes of clutch fluid leaks from the clutch system:

Worn master cylinder seals – Your car`s clutch master cylinder has seals that prevent fluid from leaking out. These seals will degrade over time, which may eventually resulting in them leaking brake fluid from above and around the clutch pedal.

Failed Brake Master Cylinder Seal: It`s exceptionally rare for brake fluid to leak from the brake master cylinder to the clutch pedal, but it is technically possible. The most likely cause in this instance would be a failed master cylinder seal.
If the cylinder develops any internal issues, it will directly affect the feel of the pedal. A leaky cylinder may cause the pedal to feel mushy or spongy, and in more severe cases, will lead to a pedal that will sink to the floor and stay there when depressed.
Clutch master cylinders develop leaks both internally and externally. Check for an external leak on the floorboard behind the clutch pedal or the engine compartment`s firewall. If there is a loss of pressure after the clutch is applied, and there are no external leaks, suspect an internal leak.
Clutch fluid is really just brake fluid that is kept in the clutch master cylinder. When you depress the clutch pedal, this fluid flows from the clutch master cylinder into the slave cylinder. The pressure of the fluid is then used to engage the clutch, which allows you to change gears.
Low clutch fluid will cause your vehicle to lose the critical hydraulic power needed for smooth gear shifting. If your gears are slipping and feel sluggish, it`s time to consider scheduling an inspection.
Yes you can. If the clutch malfunctions on a car with manual transmission, it`s not necessary to call a tow truck, you can drive it well enough to get home or to get to a workshop.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Soft clutch, topped off clutch fluid reservoir and clutch pedal became firm/springing back on its own.
ANSWER : It is most common for the clutch hydraulic leak to be from a leaking clutch slave cylinder. You should have the clutch hydraulic system inspected by YourMechanic to see why the fluid is getting low. The fluid gets low anytime there is a leak in the system. You may need to have the clutch slave cylinder replaced. If the clutch master cylinder and slave cylinder are both need replaced then it is a good idea to have both the clutch master and slave cylinders replaced together as a pair.

The clutch went out and clutch fluid leaking out.
ANSWER : Check the slave cylinder under the vehicle and see if the seal blew out. Fill up the clutch master cylinder if its low and pump the clutch pedal a couple of times and then look for the leak. Pull back on the boot on the slave cylinder to see if the leak is from the seal. If so, then the slave cylinder is leaking and needs replaced. If the slave cylinder is good, then check the clutch master cylinder for any leaks. If the clutch master cylinder is leaking, then it will need to be replaced. If you need further assistance with your clutch not working, then seek out a professional, such as one from Your Mechanic, to help you.

Why would I keep getting air and fluid bleeding through the clutch system in my 2008 Infiniti G35
ANSWER : Hello. You more than likely have a bad clutch master cylinder. These will often have a seal failure on the back side of the cylinder which will either leak or suck in air. Both of these will cause this to occur. If there are not any leaks at the slave cylinder then the master cylinder needs to be replaced and bled. If you want to have this looked at, consider YourMechanic, as a certified mechanic can come to you to [determine what is causing the clutch to do this] https://www.yourmechanic.com/services/clutch-master-cylinder-replacement

Transmission fluid leaked while pulling a car out of mud
ANSWER : From the description you’re giving me, I’m not sure. I know many Fords, including my F150, have a circular seal type bell housing inspection cover near the transmission. Fluid pooled in this area generally indicates an engine oil leak from the rear main seal or a transmission leak from the front pump seal. The only way to know for sure is to have your truck’s transmission leak inspected firsthand by a professional. The team at YourMechanic is an excellent option since we make house calls.

I downshifted into 3rd gear while releasing the clutch and then my clutch went completely loose and my vehicle started leaking 2005 Ford Mustang
ANSWER : Hello – I believe you have lost your clutch hydraulics; specifically the clutch slave cylinder. Losing clutch function, and clear fluid leaking in the area of the bellhousing (brake/clutch fluid) would confirm this. I recommend a clutch master and slave cylinder replacement performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs. The loss of alternator charging function is likely a separate issue. A charging system inspection is in order to diagnosis this problem.

Clutch sticking to floor
ANSWER : It does sound like you have a hydraulic problem. First, I would check for external leaks. If none are found, the problem could be air in the system. This could be the result of not bleeding the system properly after flushing the old fluid. In this case, the next step would be to bleed the system of air. If after this, the release bearing still does not move when the clutch pedal is depressed, there is an internal sealing problem and the master/slave cylinder must be replaced. A trained professional, such as one from YourMechanic, can diagnose your clutch issue to let you know what repairs are necessary.

my brake master cylinder leaks fluid but not all the time
ANSWER : Hi there. A crack in the master cylinder can cause the issue you’re experiencing. The system itself is not "pressurized" until the cap is closed and the pedal is pressed. When you’re driving, the fluid is continually in motion when the brake pedal is engaged; so it’s possible that the leak is worse when it sits. I would recommend having a professional mobile mechanic come to your location and complete a brake fluid leak inspection, so they can determine what’s causing the leak and recommend the right repairs.

My car is leaking transmission fluid – I can’t diagnose the leak
ANSWER : Based on the NHTSA database covering consumer complaints, as well as government mandated recalls and factory service bulletins, for your specific year, make and model, I do not see evidence of widespread complaints about transmission fluid leaks. Such leaks are, in fact, common in transmissions made by any car company, particularly if the transmission is older than say 10 years. There is a manual shaft seal, oil pan gasket, output shaft seals, case seals, torque converter seal (inaccessible) and so forth all of which are potential leak points on your transmission.

If you want to identify and resolve these leaks, certainly a certified Mechanic from YourMechanic could come out and perform a transmission leak inspection and let you know where the leak points are and what it will cost to resolve them.