Master cylinder/ clutch problem

[melg40]

ok, so on a very cold day, I was having issues shifting. After the car was parked for a while, I couldn't get it to shift at all. I ended up starting the car in first and "gear flowing" all the way home. since then, I have done some research and bled the slave cylinder, check the boot and there is no fluid, check the lines and there is no leaking anywhere.

If I pump the clutch once, I can shift into gear ok. If I pump the clutch twice, its shifts with no issues. I have eliminated the slave cylinder, lines and have decided that it has to have something to do with the master cylinder itself.

The clutch doesn't get stuck, grind and the pedal comes back up when depressed.

Is there any other troubleshooting I should do before replacing the master cylinder?

 

[miguelmcv]

Sounds like air in the system.

Redo a Bleed, make sure that you get all the air out.

The way I do it is bleeding all the oil first (drain all what is in the reservoir), once you have it drained, (it is a good time to clean the inside of the reservoir so you get a nice end clean job), after you do that, then fill it up with new oil and start bleeding it,. When bleeding, you will see when the new oil will come out and you will know that all has been flash, just do a couple of bleeding after seeing the new oil coming out and you will be set.

If you still experiencing the exact same problem, then go to the next test.

Put some one to press the clutch inside while you take a look at the piston (on the transmission), if the piston moves out freely, then might be your clutch inside the transmission, But if it doesn't move out a lot or doesn't move at all, then your master cylinder might be bad.

 

[melg40]

When you say piston do u mean the fork that the slave cylinder engages? It moves and engages. I really don't think the issue is with with the actual clutch, or anything inside the transmission unless it was the throw out bearing...

I've bled the clutch 2 times. Each time the only air that comes out is in the beginning...

 

[melg40]

Turns out it was the master cylinder. It's a pretty quick fix. A few bolts and disconnect the lines, and pin inside the car. Swap in new and reconnect. Bleed the system. It's good to go. Thanks to the forum. I used previous posts about similar issues to troubleshoot the problem.