C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Clutch Bleeding

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Old Jun 6, 2014 | 10:37 PM
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Default Clutch Bleeding

What do people use to pressure bleed the clutch hydraulic system? I am done with all the kabookee dance lifting this and turning that and 300 pedal presses. I had my wife down helping me do the FSM procedure for hours til I thought she was going to divorce me and there was STILL air coming out. This is after following all kinds of suggestions online which probably got more air in there for all I know. So what do the pro's do, which mity vac or motive system should I get to take care of this once and for all.
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Old Jun 7, 2014 | 12:48 AM
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For somewhat faster bleeding I use a vacuum bleeder, and practice being a madman by pumping the clutch pedal a lot.
The rest of the time it is the same just no vacuum bleeder.

Last year the clutch and DMF flywheel needed changing, I tried all of the suggested methods to use a push style clutch and I could never get the hydraulic thow-out bearing to not leak. One time I thought it was not leaking and drove to a store about 30 miles at one of the busiest intersections the master cylinder ran dry. I had a small bottle of dot 3 in the car filled the master, and pumped the clutch pedal like a madman for about 20 seconds and it worked great until the master ran dry again (while pulling into my driveway).
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Old Jun 7, 2014 | 03:45 AM
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I just replaced the clutch master and slave on my '92. I had a terrible time trying to bleed it the old fashion way. Having someone press and depress the clutch while I opened and closed the bleeder valve on the slave cylinder. I found the easiest way to do this without using a power bleeder is once the slave and master are filled with fluid you push the plunger in on the slave cylinder to force the air out of the top of the system. Leave the cap off the master and when you push the plunger in on the slave you will hear air escaping from the master. It's easiest to have someone watching the master to see when air stops coming out. I did this 4-5 times and I had a really firm clutch pedal. I found this little trick from searching these forums. Hope this helps.
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Old Jun 7, 2014 | 09:55 AM
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I just used one of those simple little one man bleeder kits. Put a little fluid in the bottle, and attach the hose to the slave bleeder. You'll have to empty that little bottle a couple of times, but after that it didn't take too much pumping to get it right. Note, that all you're really trying to do is get all the air out of the slave. Once you do that, the system is designed to be self bleeding.
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Old Jun 8, 2014 | 11:57 AM
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A Pheonix Bleeder will get it done the first time every time. They are not cheap but once it comes out of its case it just paid for itself in time. Just my .02
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Old Jun 8, 2014 | 05:49 PM
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Originally Posted by Deakins
A Pheonix Bleeder will get it done the first time every time. They are not cheap but once it comes out of its case it just paid for itself in time. Just my .02
Is there a particular model you would recommend? they range from $50 to $300 on Amazon. With all the time I have wasted on this job, I would have been better paying someone to do it so yea, cost isnt a problem if it saves time, but dont want to over specifiy. Pretty sure I got a bad master cylinder out of Advance Auto, there is fluid on the seal where the linkage is so I am going to be starting over.
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Old Jun 8, 2014 | 07:15 PM
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Originally Posted by wschmidt
Is there a particular model you would recommend? they range from $50 to $300 on Amazon. With all the time I have wasted on this job, I would have been better paying someone to do it so yea, cost isnt a problem if it saves time, but dont want to over specifiy. Pretty sure I got a bad master cylinder out of Advance Auto, there is fluid on the seal where the linkage is so I am going to be starting over.
I used the cheapest model which is available (think it was about $80) and it worked first time. However, if I was to do it again I'd buy a nicer model with a metal body, instead of plastic. It really is a great long term purchase if you plan to bleed brakes, clutches, etc.
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Old Jun 8, 2014 | 09:40 PM
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Here is a pretty good write-up on C4 clutch maintenance and bleeding. Also, I have used the Motive Power Bleeder on C4 brake and clutch systems with good success.

FWIW,

P.
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Old Jun 8, 2014 | 09:57 PM
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This is what I used.... A big a$$ syringe and i filled it with fluid and injected it directly into the bleeder screw. This forces all the air to come out the reservoir. Just make sure you don't have your reservoir too full

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Old Jun 10, 2014 | 04:46 PM
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I have their top tier model as I do this type of work for some people on occasion. Any of them with the metal body are very nice as mentioned above. You will love doing brake fluid flushes with it as well if you invest in one. Hit me with a PM if you have any other questions.
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