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

clutch bleed

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Old 10-07-09, 01:22 AM
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clutch bleed

I was just wondering if anyone can tell me how to bleed my clutch in a 85 GS???
Old 10-07-09, 02:16 AM
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simple hook up a tube and a catch container to the bleed on the clutch slave and then fill up the resivior with clean fluid pump the clutch until its almost empty and refill, just like bleeding you brrakes.
Old 10-07-09, 05:58 PM
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My suggestion would be to push the pedal down SLLLOOOOWWWWLLLYYY and also, when it returns to it's 'up' position, release the pedal SLLLOOOOWWWWLLLYYY.

This ensures that the port valves that let the reservoir fluid into the piston chamber on the upstroke don't allow more air bubbles into the line.

The volume in the piston chamber, line, and slave cylinder aren't that great, so you really only have to refill the reservoir maybe once or twice at most.

Good luck,
Old 10-07-09, 06:39 PM
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Originally Posted by BeenJaminJames
Bleeding the clutch is a two-man process: First make sure your clutch resivoir is full, leave the cap off and the bottle handy. Find the bleed screw on your slave cylinder, it should be on top of your engine, toward the back. I do not have any pics handy, but follow the rubber line coming from underneath the resivoir. You will need to pull the air cleaner off, and possibly the fuel lines from the firewall so you can get access.
Now grab an 8mm wrench and break the bleed screw loose (carefull not to break it off, a little PB blaster helps on the rust) and tun it back just till you feel it close. Now get your buddy/girlfriend/little brother to sit in the driver's seat and pump the clutch pedal slowly.

Now just after the pedal starts going down, open the bleed screw about a quarter turn, and have your buddy call out justbefore the pedal hits the floor--you want to close the screw while the pedal is still going down--slower is better here. With the screw closed, have him lift the pedal back up, and repeat until good clean fluid comes out with no air bubbles. Remember to keep an eye on the resivoir, if it runs out, you'll just suck air and have to start over.
Also It's good to have rags handy, or a clear tube (so you can see what's coming out) over the tip of the bleed screw. If you have a nice, clean, painted engine bay you will want to go with the tube and catch can as brake fluid is an effective paint stripper.
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