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 Post subject: PB adjusting rod.
PostPosted: Sat Jun 06, 2020 2:37 pm 
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TBI Slant 6

Joined: Sat Jan 24, 2009 10:19 pm
Posts: 138
Location: little rock, AR
Car Model:
Since I R and R the PB master cyl and finish with a complete brake job I've had this vacuum hiss down at the pedal. I was told that I need to adjust the rod. To do that do I have to remove the shroud thats bolted to the fire wall and under the dash. Its a mother to see everything and the humidity is about to kill me . lol Then the heat of the light doesn't help either.This is on a 1979 Volare.


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 Post subject: Re: PB adjusting rod.
PostPosted: Sat Jun 06, 2020 4:01 pm 
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TBI Slant 6

Joined: Sat Jan 24, 2009 10:19 pm
Posts: 138
Location: little rock, AR
Car Model:
I used the search engine and found out its done by unbolting the MC. Do I just run the ball in . I grab the rod with vice grips and put a 3/8 on the ball but its not moving. Please help.


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 Post subject: Re: PB adjusting rod.
PostPosted: Sat Jun 06, 2020 4:12 pm 
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Supercharged
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Joined: Thu Jan 27, 2005 8:32 pm
Posts: 7776
Location: SW Washington
Car Model: 1965 Plymouth Barracuda, 1954 Dodge C1-B8
If you hear hissing it's highly likely the booster diaphragm is ruptured. Adjusting the pushrod-to-master cylinder clearance will not fix this.

_________________
Joshua


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 Post subject: Re: PB adjusting rod.
PostPosted: Tue Jun 09, 2020 10:20 am 
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TBI Slant 6

Joined: Sat Jan 24, 2009 10:19 pm
Posts: 138
Location: little rock, AR
Car Model:
I rev up the engine and you can see the brake pedal move. I adjusted it some but it still has this issue. What the consensus???


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 Post subject: Re: PB adjusting rod.
PostPosted: Tue Jun 09, 2020 1:22 pm 
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Board Sponsor & Moderator
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Joined: Thu Oct 17, 2002 7:27 pm
Posts: 12841
Location: Park Forest, Illinoisy
Car Model: 68 Valiant
I just bumped a thread on rebuilt boosters. There's a link in it with instructions for adjusting.

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Official Cookie and Mater Tormentor.


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 Post subject: Re: PB adjusting rod.
PostPosted: Sun Jul 19, 2020 7:53 pm 
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Turbo EFI
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Joined: Wed Nov 23, 2011 11:07 am
Posts: 2097
Location: SF Bay Area
Car Model: 67 dart 2 door hardtop
Mine is an aftermarket unit, but I can adjust the rod from under the dash, no need to remove the unit from the firewall.

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