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Help bleeding Ecotec clutch slave
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Supernaut
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Jul 8, 2013, 10:44 PM
Post #1 of 6
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Help bleeding Ecotec clutch slave
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I have a 2004 Pontiac Sunfire with the 2.2 Ecotec engine.
So I replaced the notorious clutch hydraulic line that had warn through against the electrical harness bracket it rubs against. I'll save the details of the whole process but now it comes time to fill and bleed the system. Many tutorials I have read don't seem to apply totally as the ecotec has the slave cylinder internally placed within the clutch housing and without a bleed valve directly on it. Only the bleed valve in the line immediately before it.
I tried the suggested traditional methods. Push and hold pedal down, open valve, close valve, lift pedal, repeat.
What has me most concerned here is that either the slave cylinder or the clutch itself is squeaking LOUDLY when the pedal is moved. This is the condition that really is not improving and I thought it might have to do with air still being in the slave. This squeaking condition did not exist before I started this repair.
Now I read on one forum for the ss cobalt, someone said you can get around this by having your partner pump the clutch up and down several times with the bleed valve closed, then hold the pedal down while the bleed valve is opened slowly. I tried this and it seemed to release air (at the bleed valve) and fluid then I closed the valve. A jet of fluid would shoot up into the reservoir but no bubbles. However after going through this process a dozen times nothing seemed to change or improve. Every time there would appear to be a bit of air coming out the bleed valve followed by a jet of fluid. After pumping a couple times on the pedal with the bleed valve closed, pressure does build and pedal becomes stiff. Too stiff I would say.
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Discretesignals
Ultimate Carjunky
/ Moderator
Jul 8, 2013, 11:07 PM
Post #2 of 6
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Re: Help bleeding Ecotec clutch slave
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http://www.justanswer.com/...01_231518_ANSWER.pdf
Usually noises in the clutch system are not caused by air in the hydraulic system. A firm pedal and being able to easily shift into gear with the engine running means you have gotten most or all of the air out of the system.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jul 8, 2013, 11:08 PM)
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Supernaut
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Jul 9, 2013, 7:31 AM
Post #3 of 6
(4264 views)
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Re: Help bleeding Ecotec clutch slave
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In my frustration at one point I tried the traditional bleed system in reverse. The squeak started after this point. Could putting vacuum on the slave cylinder damage it and cause the squeak?
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 9, 2013, 7:40 AM
Post #4 of 6
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Re: Help bleeding Ecotec clutch slave
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There is no relationship between bleeding and noises unless you just bent something into something else and I don't see that happening.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Supernaut
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Jul 10, 2013, 4:41 PM
Post #5 of 6
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Re: Help bleeding Ecotec clutch slave
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I have the clutch line changed and the air all out as best as I can tell. The squeak is still there. I'm starting to think it may have already being squeaking like that before the repair as it is not easy to hear it when the engine is idling, and not at all once driving. The squeak comes from the area around the slave cylinder. It happens while moving the clutch in and out, not a continuous sound like when the clutch is spinning with the engine.
Would this sound indicate a slave cylinder that is about to fail or maybe some part of the clutch itself?
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Discretesignals
Ultimate Carjunky
/ Moderator
Jul 10, 2013, 4:50 PM
Post #6 of 6
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Re: Help bleeding Ecotec clutch slave
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Could be a dry front bearing support. A clutch pressure plate with finger issues could be getting ready to go south. Sounds like it will be getting a clutch job.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jul 10, 2013, 5:08 PM)
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