Master Cylinder Boot PLUS Bleeding Woe's - Team Camaro Tech
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post #1 of 5 (permalink) Old Feb 23rd, 14, 06:49 AM Thread Starter
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Craig
 
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Master Cylinder Boot PLUS Bleeding Woe's

On my 68 power drum brake m/c, is there supposed to to be a boot covering the rear part that enters the booster? On the old one, and new one there isn't but pictures I have seen shows one.

I bench bled until I got no air bubble. I put it back on the car and now have hardly any brakes. The dist block ect was never taken apart etc. I do however have signs of slight leakage at the mounting portion that enters the booster hence the boot question. Maybe I have a bad rebuilt MC.

So now we have a cruise in this evening and I have no brakes.....! First day of good weather in a month!

-Craig

Prepare to be the center of attention when you drive a first generation Camaro. You will be gawked at. Grown men & women will coo like children when you drive past. Children will scream like babies. Dogs & cats will get along. Does it get any better?
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post #2 of 5 (permalink) Old Feb 23rd, 14, 07:10 AM
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Re: Master Cylinder Boot PLUS Bleeding Wows

There is a plastic tube that allows clean air from the interoir to enter the booster.

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post #3 of 5 (permalink) Old Feb 23rd, 14, 07:52 AM
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Re: Master Cylinder Boot PLUS Bleeding Woe's

Yes, there's a rubber disc that goes in the recess at the back of the m/c and that the pushrod/shaft. I think its function is to help keep booster vacuum from being applied to the shaft seal of the m/c and possibly causing a leak.

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post #4 of 5 (permalink) Old Feb 23rd, 14, 05:04 PM Thread Starter
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Re: Master Cylinder Boot PLUS Bleeding Woe's

Thanks. I'll call in the morning and try to find one. Got the bleeding issue resolved. Bench bleeding didn't wok on on the car did.

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post #5 of 5 (permalink) Old Sep 22nd, 15, 08:27 PM
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Re: Master Cylinder Boot PLUS Bleeding Woe's

Quote:
Originally Posted by Steiner View Post
Yes, there's a rubber disc that goes in the recess at the back of the m/c and that the pushrod/shaft. I think its function is to help keep booster vacuum from being applied to the shaft seal of the m/c and possibly causing a leak.
Should a remanned MC/PB combo come with that rubber disc? I don't recall seeing one on either of the 2 that I have gotten from AZ and both MCs started leaking back into the PB.

Also is there supposed to be a rubber boot around the shaft inside of the car? I was looking at the instructions that came with the combo I ordered today and it says I need to reuse the original rubber boot but it has no pics so I'm not sure what they were referring to.
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