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Leaky clutch master cylinder!


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Hey all,

I was taking the interior out of my MJ to examine the extent of the rust in the floor panels and discovered I've got a leaky clutch master cylinder :mad: . My question is, is this a part that I could get at any auto parts store or would I have to order it online? Also, how much should I expect to spend on it?

 

Thanks for looking,

Matt

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The last thing I would be worried about right now is replacing it. Get it out NOW! That brake fluid leaking on top of the fuse box will eat away and make your fuse box very brittle. To the point where the truck develops gremlins that can only be fixed with a new fuse box... (Entire Wiring harness!) Hopefully you have just caught it. If not, it might be too late... Get in there, disco the battery, and start cleaning your fuse box off with some electrical cleaner to stop any continuing damage.

 

Rob L. :cheers:

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I've got a rag between the cylinder and the fuse panel to catch any drips. Its not a bad leak, just a drip or two when the clutch is depressed. The fuse panel appears to be in good shape, do distortion or anything, so hopefully I caught the leak early. All of the electronic gizmos seem to be working (except the clock).

 

Matt

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bleeding procedure on the clutch is just like a brake job,

 

you want to try to get the master itself bled a little before you install it, but then crawl under the truck and crack the bleeder while someone is depressing the pedal. then close the bleeder and release pedal. repeat as necessary.

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Pardon my ignorance, but where exactly is the bleeder for the clutch master cylinder? I've got a service manual, but there aren't any pictures that show where its at on the truck.

 

Matt

under the truck there will be a metal line going into the transmission bellhousing on the drivers side little more than halfway up. the other line that comes back out will have a bleeder screw on the end of it.

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Just curious if anyone has attempted to get their clutch master cylinder out by themselves. I've tried and can't seem to get it. I'm having problems with the top bolt that holds the master cylinder onto the firewall. Any one have any tips? :dunno:

 

Matt

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Just curious if anyone has attempted to get their clutch master cylinder out by themselves. I've tried and can't seem to get it. I'm having problems with the top bolt that holds the master cylinder onto the firewall. Any one have any tips? :dunno:

 

Matt

 

PM me your addy if you want a hand one day shoring the MJ up. I am in your area... Usually have free time.

 

Rob L.

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It's probably just frozen to the firewall from rust and crud buildup. Spay with pb-blaster or similar, let soak. If it were me, I'd give it some sharp whacks with a hammer to break it free.

 

Have you gotten a replacement yet? I ordered the Rhinopac M0112 and it's a nice piece, sturdy construction and made of metal. Far superior to the plastic piece of crap I pulled out. I ended up paying $30 shipped. I've got a discount code if you're interested, not sure what the current prices are though.

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Well, I sprayed the heck out of it with PB Blaster last night and just tried again to remove the clutch master cylinder. Still no luck. Is the bottom stud welded to the firewall or is it just another bolt like the top?

 

Matt

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The bottom stud is welded to the fire wall.

 

The problem your having is dissimilar metals, Steel firewall & bolts, and cast alum master cylinder.

 

As suggested above, you need to take a BFH to the old MC and knock it off, that will be the only way to brake the bond of the galvanic reaction.

 

PB Blaster, although a good product, will not cut it here.

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I STILL can't get the clutch master cylider off of the firewall! I just can't get it to break free. I'm afraid that if I keep trying, I'll end up pulling the stud through the firewall. I really need some help here guys, I"m out of ideas. :???:

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OK.......I assume you removed the rod off the clutch pedal???

 

If you can't swing a hammer in the compartment, you could always use a 2x4 to reach it, and then hit the 2x4 with the BFH :D

 

If by chance, and I doubt it, you do break the stud off the firewall, you can always drill it out and replace it with a nut and bolt.

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