2014 Mitsu Lancer GT 140K miles. Car shifted perfect 2 days ago drove it home. Parked it in the driveway.
Went to take it out yesterday night and pushed in the clutch and I got no resistance on the pedal. The pedal comes back but seems easy to press. With engine off will go into every gear, but when running it won't and will grind if you force it.
Trying to discern between whether it could be the master or slave cylinder. Or should both be replaced at the same time?
And has anyone ever heard of these things just failing from sitting in the driveway? It doesn't make sense to me how it could fail just sitting around. No symptoms until failure and clutch felt perfect a couple days ago.
The area of the leak should be wet with brake fluid. It appears the clutch slave cylinder is internal on that car so pray that's not what is leaking.
@chucktobias It's a snowstorm here currently so I haven't had time to go out and look at it in depth but I went out and did some investigating. Took a look at the clutch pedal where it meets the firewall and it appears its wet right there and it's that seal that has gone bad.
I am aware aftermarket parts suck now. OEM is 170$ straight from Mitsu, RockAuto aftermarket is 51$ ships in a couple days. In your opinion, is it worth it for OEM?
The Mitsu part number is "2345A085". It's an interesting looking part. I've never seen a master cylinder like it before - it looks all plastic and has rubber lines...
Any general advice for changing it/bleeding? First manual I've owned that I've had to work on. Hope the slave is still good - but if it isn't I'm doing a clutch while I'm in there.
Sounds like the master cylinder is indeed leaking. Obviously you'll need to bleed the clutch hydraulics. Some vehicles are tough to bleed and require pressure bleeding to get all the air out.
It is best to stick with OEM, or at least the OEM supplier if you know what it is. (Possibly Denso.) You may be able to find discounted Mitsubishi parts online but beware of counterfeits from Amazon and eBay.
@chucktobias Did unfortunately end up being the slave cylinder which is indeed internal - it was leaking out the bell housing. I drove it for a while bleeding it pumping the pedal but it was stressful to not know when I may not be able to go into gear. I decided to drop the transaxle myself and get it done here in my garage. I started last weekend and have gotten everything removed to the point of just dropping and reinstalling the axle.
I picked up an excedy OEM clutch kit that included the slave to put in while I am in there. Also doing the master cylinder. Could not believe how expensive 75w-80 gear oil is lol. Hope it goes well I want to finish it this weekend.
Bad luck having it be the slave cylinder leaking. Dropping the trans on a front-drive car is not a whole lot of fun. You're doing the right thing though in replacing the entire clutch while in there. The kit should come with throwout and pilot bearings but if not get replacements for those as well.