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I blew out the slave (an obvious thing from the puddle and action of the old one) and bought a replacement. I also have a MityVac kit and tried to bleed the system with no real luck. My driveway is on a bit of an incline with the front of the car being higher (a little) than on a flat surface. I jacked up the back and that helped a little.
I suspect that I was drawing air into the hose as I sucked the brake fluid in... It was dark and cold of course. So... just what are the Porsche tricks here. I read about jacking the rear end up. Should the clutch pedal be against the firewall or in the released (up) position? Will the MityVac thing work or am I just wasting time? What is the best way to get my toy on the road again? Thanks in advance for the help! |
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Registered
Join Date: Jun 2001
Location: MN
Posts: 604
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Clutch pedal up. This is a ***** so go over to 944 Garage and look at their procedures. Short story is you do want the rear end of the car higher but it may not do it. Take the bleeder nipple off and put some grease on the nipple threads so air can't get by. Try pulling the slave off to bleed and tilt it rear up; then put it back in. The problem is air gets trapped due to poor design and if that isn't bad enough air wants to get back in around the threads and the tube of your Mighty Vac. Power bleeder from the top is better.
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I've used the Mity Vac twice to bleed my clutch. I had no problems with it either time. The clutch pedal should be completely up. Bubbles coming through the threads were annoying but I don't think that it allowed air into the system. Just make sure that the reservior never gets low during the bleed.
If you still can't bleed completely, you may have a leaky seal. Just a guess. I agree with IceShark. The pressure bleeder is much better. I helped a friend with his Mercedes and a pressure bleeder. Quicker, more thorough, and less messy than a vacuum bleeder.
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-Dave- 1969 911/3.0l SC |
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Registered
Join Date: Jun 2001
Location: MN
Posts: 604
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Dave, the problem is he replaced the slave and has total air in the system. Your good experiences with mighty vac are now invalid, believe me, and you don't need to ask me why I know this.
![]() The slave has an air pocket condition because of design and the nipple not being at the absolute high point of the slave. Once air gets in it is plain tough to get out which is why if you tilt things like pulling the slave out or raising the rear of the car very high you can usually solve the problem. |
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