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post #1 of (permalink) Old 04-13-2005, 09:40 AM Thread Starter
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Clutch Hydraulic Pressure Loss

Had a new clutch, slave cylinder and hydraulic line installed in my 90 Chevy 4x4 in January. The shop at the time said they had touble bleeding the clutch, and said if it acted up to bring it back. Well it worked fine until yesterday, after about a hundered mile round trip the truck in front of me did a quick stop. I hit the clutch and the pedal went to the floor quickly without disengaging the clutch. Luckly I had room to manuver and also the guy in front of me started back up. I coasted in to a parking lot and checked the clutch master cyliner. It was full of fluid. Pumped the clutch a few times and all was good, fine pressure and clutch was working good. Started on my way back home once again, about 5 miles later I started to slow down and pull into the school and no clutch again. Pumping brought it back up. Happened twice more prior to making the last five or so miles home. I'm thinking somehow air is getting into the line or never was totaly bled. Any one have any ideas? It's going back to the shop today.

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post #2 of (permalink) Old 04-20-2005, 12:03 AM
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Re: Clutch Hydraulic Pressure Loss

Yup..bleed it again, or have the shop do it if ya trust 'em. Some of those boogers take awhile to get all the air out.

Otherwise double check a solid connection of the hydraulic line at the master and slave cylinders. I doubt that's it since you still report having all your fluid. Good luck. Don't run over any deer. hee hee
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post #3 of (permalink) Old 04-20-2005, 08:40 PM
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Re: Clutch Hydraulic Pressure Loss

you have to back bleed it from the slave cynlder up. you can do this by pumping on the slave cylinder.

take socket or something that will fit over the rod that fits between the slave and the throw out bearing arm.

maybe 1/2" drive socket with a 3/8"-1/2" adapter in it. use the big socket it end on the palm of your hand and the 3/8" end on the rod.

all this is so you can pump on the slave without hurting your hand.

push the rod in till it stops then let it push it self back out. have someone watch the bubbles in the mastercylder so that you dont think your wasteing your time. your not. it just takes awhile. and will probly get rid of alot of the free play in your clutch pedal.
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