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clutch master & slave cylinder replacement notes (94 Civic EX)
Today I replaced the clutch master and slave cylinders on my 94 Civic
EX. Master cylinder was leaking and starting to feel funny, and the dealer on pre-purchase inspection had said that the slave was leaking too. Turns out it didn't appear to be, but the boot was pretty rotten, the piston didn't look exactly perfect, and I had already bought the part, so I stuck it in. Piece of cake, mostly. Couple of tips for anyone doing it: 1) It's pretty much impossible to use even a 12-pt combo wrench on the left master cylinder nut. Because the bolt extends way beyond the nut and because the fit is really tight, I used a deep socket on a 3-inch extension. Once they're loosened slightly they come off real smooth with a finger. 2) While one *might* be able to get the new master cylinder in without removing the clutch fluid reservoir, it is *much* easier both out and in if you remove it. I sucked the fluid out with one of those MityVac vacuum pumps, then placed paper towel underneath before removing the reservoir hose. Wow, was that fluid dirty--black with crud, I assume from the degradation of the rubber in the master cylinder. Incidentally, the ~$35 MityVac job (if I remember how much I paid for it) has a plastic pressure gauge cover that cracked and came off at the first little scrape in the trunk. Shoddy design, I'd say. They do sell a metal one, but if I recall it's about double the price. 3) I recommend completely removing the short length of pipe that's connected to the slave cylinder to prevent damaging the pipe in trying to get it out of the cylinder after unscrewing the fitting. It's jammed in there pretty well, and the shape did not lend itself to coming out easily till I disconnected the other end as well. I suppose you could just unbolt the slave at that point and it might not be a problem. 4) I put anti-seize on the slave cylinder bolts before reassembly, but this really didn't seem all that necessary, as they came right out. Foolish me, though, had my hand in a stupid place as I was applying leverage, and I took off a good amount of skin. Ow. Good reminder to wear latex gloves, and be careful of where body parts are when applying force. 5) Between both sucking the fluid out of the reservoir and completely changing the fluid during bleeding, I caught just 80 ml of fluid. System holds a lot less fluid than the brake circuits, for sure. 6) The last guy/gal to touch the release fork boot just shoved it in improperly. It was permanently deformed in such a way that crud could enter the clutch housing, and the rubber was pretty rotten. I replaced the boot. Hoping there isn't too much crap in the housing... Done in around 2 hours, including clutch pedal readjustment; that long mainly due to maneuvering tight spaces and schmoozing (did it on the street). ;-) Abe |
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