1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Rebuilding CMC

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Old 04-19-04 | 07:02 PM
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Illswyn's Avatar
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From: Holiday
Rebuilding CMC

Ok, so I'm seeing a few posts about the Clutch Master Cylinder. I figure I have a nice camera, I'll make a post with pictures, for a nice little reference.

Here's what the innards of my CMC looked like, in all it's dark fluid glory:


This is the rebuild kit I bought at NAPA:


Notice I have the parts in the order to be installed...

Except there is a washer, and rubber piece to the side that I am not sure where it goes.

If anyone could help me out there, I'd love to get this put back together (correctly) tonight (: Then this can serve as a visual reference to anyone that wants to rebuild their CMC, but are hesitant (like I am) about removing vital organs that are not completely broken, even though they might be soon.
Old 04-19-04 | 08:24 PM
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Ok, well, what I did was push all the parts in order into the cylinder, and reused the old clip, because it's just a clip, and it fits better.

I put all that in, then the clip, then the washer, then that rubber piece. Then shoved the whole thing back in the car. Sprayed a ton of WD-40 on the studs, because they kept sticking when I was removing the nuts.

Tightened it down, filled with brake fluid, pumped a ton on the pedal, closed off the slave cylinder, and was done.

I took it for a short drive, and WOW what a difference. There's still about 2 inches of initial play in the pedal, but I can tolerate that (anyone know how to adjust that?). What has changed is now I can hold down the clutch longer than 3 seconds at a light, or backing out of a parking space, etc. Before, the pedal would stay down after a short time, which is common when doing those things. I'd have to pull the pedal back up with my foot.

Hopefully this will last me a while, eventually I'll probably rebuild the slave cylinder as well, because everyone seems to agree they go one after the other.
Old 04-20-04 | 12:34 AM
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Yep.
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