Damn, I thought it had only been like 3 weeks. It's been almost 6!
My clutch parts came in within a few days, but I didn't even open the box until this morning. Combination of it's hot, I'm lazy, and I spent some weekend time working on other projects.
This was one of my other projects that I was finishing (still not quite done), but I digress.
Clutch master and slave plus the hose. You'd think that would be a job that could be done in about 45 minutes. Not so, my friends!
First, I was gonna put the car up on ramps. I knew that might not be easy with the clutch not working properly (if at all). Figured I could use the starter and crank it up the ramps. Alas, the car hasn't been started in almost 6 weeks... and the last time I drove it was at night (lights on), and I had start it in gear at every traffic light... so, of course it didn't have enough juice to even turn over. (thankfully, I put it on charge while I was working, and it recovered)
So, I ended up jacking up the car and putting it on stands. One of the jackstands ended up being in my way the whole time I was working under the car. Of course.
I opted to start on the top side. Broke loose the hydraulic hose (I've learned! Forgetting to loosen things like that FIRST always comes back to bite me!), no problem. Loosened the upper slave mounting nut, no problem. The bottom one? Well, the slave cylinder is in a metal box, the side of which is about 1/2" from the side of the master cylinder. Can't put a wrench on that lower nut from the top. The MC is an old-school British design with a "can" style reservoir. The bottom of the can hangs below the outer tube part of the cylinder such that you can't get a socket on it from behind!!! I guess the factory installed it on the pedal box frame before installing it on the car. I "could" remove that assembly, it's 8 bolts. But, to do so, I'd have to also undo the brake hydraulics, and I'd rather not mess with that system. What to do?
Consult the MG forum! There are folks who say that they've manage to get it done with a particular 1/4" drive swivel head 1/2" socket. I thought about ordering one. But, the more I looked at it... it just doesn't look like anything should be able to get around that can. Another solution that someone used was to use a chisel and hammer to loosen the nut and then spin it off by hand. I liked that idea, so I gave it a shot.
Of course, the stud that the nut is on was painted over when the car was painted red. To my surprise, it knocked loose easily enough. (the car isn't rusty) But, it wouldn't turn by hand. I had to use the chisel to keep knocking notches into the nut and turning it a little at a time. But, I got it off!
Before I started this process, I looked at the replacement MC. It's a different design (I'm betting it's something off of a 70's era Mitsubishi or Honda... not uncommon for such parts to fit these cars, I was finding the same sort of things when I was researching what to use for a brake light switch), has a plastic reservoir that doesn't hang below the cylinder, and the outside of the cylinder is smaller. So, no interference with the nut. Once I got the old one off, putting a (new) nut onto the new MC from behind was cake.
That all got done, and I got the new hose routed through it's hole behind the battery and connected to the MC. I didn't start this job until just after noon... and I did take a little lunch break... but, now it's after 3pm. Geez!
Time to get under the car. Looks simple enough. It's got one of those pinch-collar type mountings. If you've ever done front struts on something like a Ford Focus (or very related Volvos, or something like an older Civic, you've seen this arrangement holding the bottom of the strut). One bolt. Easy, right? Not fucking so, my friends!
I first removed the nut. Think it was just pinching the slave cylinder, I very briefly tried to twist and pull the MC out. Wasn't happening. Decided to research on it. (yeah, I could have done all that before I started, but that wouldn't be very manly, now would it?)
This time, I grabbed the manual first. It has some photos, but the instructions weren't all that great. Looks like the bolt has to come all the way out. A quick check of the MG forum verified that. (I love working on this car... it's just like working on a Miata... there's NO problem you can have that someone else hasn't already asked about on a forum) The bolt has to come out because it fits into a slot in the SC that locates it. And the whole thing can be fidgety to remove. Cool.
Back to it. Got the bolt out, no problem. There's even room above it to work with. Nice. This sucker doesn't want to come out! It's a tight fit in its hole. Used a pair of channel locks to twist it back and forth whilst pulling on it. Took a few minutes, but it came out.
I was smart again and remembered to thread the hose onto the SC before mounting it. Those things can be a pain to get lined up and started after the SC is mounted to the transmission!
Fitting the new SC turned out to be a royal pain, and seemed like it took over an hour. Maybe it was 45 minutes. It was too long.
It's a tight fit, and I'm working around both a jackstand (eventually, I put the car on a jack and moved that jackstand... I still had two stands under the car for safety, but the jack was holding up the car) and the exhaust a little bit, so mostly working one-handed. Eventually, I ended up taking a screwdriver (tight fit for that, but just enough room) and prying the "pinch collar" part apart where the bolt clamps it. That opened up the hole enough to more easily slide the SC into place.
The next hurdle, because things are still tight, and it will only move with the screwdriver actively prying the collar open, was getting the stupid pinch bolt back in! I could position myself to where I could see into the hole with a light, so I knew it was "close" but not quite lined up. Stuck a round punch up into the hole, but the punch was too small of a diameter to help anything, plus things are tight enough that it wasn't going to just "pry" into place.
I didn't want to beat up the bolt that I was re-using, so I found one on the shelf that was the same diameter and longer. Used it as a drift. Hammered it into place. That made sure things were lined up. Of course, I couldn't get that bolt back out. But, prying with the screwdriver loosened things enough that it pretty much fell out without losing alignment (much).
The proper bolt goes in from the top (I guess it "could" go the other way, but that's the way it was), and it didn't fall into place like I wished that it would. There was prying involved. There was hammering the longer bolt partly in from the bottom to be sure things were still lined up. And eventually, I did use a hammer (in a very weird way, because I couldn't properly hammer it from the top... so, it certainly wasn't "hard" hammering) to tap it down to where I could fit the nut to draw it the rest of the way down. That all worked, just took time.
Okay! Now, I all I have to do is bleed it! Easy! Well, no, my dear friends, it is not. It is well-known that bleeding the clutch on these cars, for whatever reason, is notoriously difficult. But, the last time I did it, it seemed pretty normal and easy. Maybe I'll get lucky? I DID take the time to bench bleed the MC, surely that will help?
Called in the wife to work the pedal. And it really didn't take long to get fluid to flow. (fun fact, the only brake fluid I had in the garage was half a small bottle of RBF-600, that's 600-degree brake fluid for track driving... serious overkill for clutch hydraulics... and not enough of it) Got a couple reservoirs of fluid through the system, and didn't seem to be bubbling. Let's check it out...
Nothing. No pedal at all. WTF?
I pondered for a moment. It was pumping fluid when I bench-bled it. It pumped fluid enough to get through the system. Then I looked things over. The new clutch hose is conveniently clear (old one was bright red), and the problem was obvious. Big ol' air bubble at the high-point of the hose. Gonna have to work that thing out somehow, and I don't have a pressure bleeder.
Consulted the internet for ideas. Somebody's had luck using the sprayer off of a spray bottle as a sort of vacuum pump. I gave that a shot. It did initially work, though it wasn't moving the volume of fluid that I needed it to. Then it quit. I wonder if the innards of that sprayer reacted with the brake fluid? I could still see the bubble, though. I need to move a LOT of fluid quickly to get that out, otherwise the bubble just continually rises to the top.
What I ended up doing was just using VERY quick, sharp pedal strokes to clear the bubble. Part of it was moving the bubble more quickly... part of it was moving the bubble back and forth quickly enough to sort of aerate the bubble to help it move. I was able to get 7-8 quick full-strokes of the pedal before emptying the tiny MC reservoir. With that, I got most of the bubble out before I ran out of fluid. I even recycled some of my bled-out brake fluid (fresh fluid that's been through a new system, aside from the fact that I was using a water bottle that may have had some water in it as a catch vessel... why not?) so that I could keep working.
In the end, I got MOST of the air out, enough that the pedal came to life and I was able to drive the car. And drive the car, I did! And it was good! A little finicky getting into gear from a stop, especially reverse. But, it shifted well, and it was a nice drive. Ended up running over to Wal-Mart to get some brake fluid. I'll re-bleed again sometime soon, and it should all be good to go!
7+ hours to do a 45-minute project. Par for the course, I suppose.