New booster = lower brake pedal?
Thread Starter
Drifting
Joined: Dec 2002
Posts: 1,474
Likes: 4
From: Tracy CA
New booster = lower brake pedal?
I finished the brake booster install this weekend. The new one doesn't leak or hiss, but the brake pedal is significantly lower. The brake lights were on all the time because the pedal didn't come up high enough to turn the switch off.
So, I adjusted the switch.
But now the brake pedal is a good TWO inches below the clutch. I can't pull the pedal up by force to meet the clutch. They were almost parallel in height prior to this.
Suggestions?
1. Is this the wrong booster from Autozone? P/N: 54-71405
2. Can I adjust the rod that goes into the master cylinder to change this?
So, I adjusted the switch.
But now the brake pedal is a good TWO inches below the clutch. I can't pull the pedal up by force to meet the clutch. They were almost parallel in height prior to this.
Suggestions?
1. Is this the wrong booster from Autozone? P/N: 54-71405
2. Can I adjust the rod that goes into the master cylinder to change this?
Thread Starter
Drifting
Joined: Dec 2002
Posts: 1,474
Likes: 4
From: Tracy CA
Originally Posted by Bill's86Coupe
The rod can be adjusted...then after that,make sure the brake light switch is still within range.Youve compensated for a lower pedal height.
Le Mans Master
Joined: Apr 2002
Posts: 5,727
Likes: 47
From: Waukesha WI
St. Jude Donor '15
If you unbolt the Master Cylinder you will see the tip of the pushrod on the booster. That tip can be screwed out (towards the M/C). Be careful not to wind it out too far or you may cause brake drag or some other internal M/C problems.
Drifting
Joined: Sep 2004
Posts: 1,638
Likes: 3
Be really carefull in adjusting the rod - a few turns is probably to much - and will result in internal damage to the new Booster - fluid leaking inside and failure!
Do a search here and in C-4 - you should find several threads discussing this!
Carl Johansson
Do a search here and in C-4 - you should find several threads discussing this!
Carl Johansson
Thread Starter
Drifting
Joined: Dec 2002
Posts: 1,474
Likes: 4
From: Tracy CA
The rod adjustment just takes play out of the system - it doesn't actually move the base position of the pedal.
Therefore - Autozone gave me the wrong part. Going to take it out and put in the metal one that folks suggested.
Therefore - Autozone gave me the wrong part. Going to take it out and put in the metal one that folks suggested.
Instructor
Joined: Jul 2005
Posts: 125
Likes: 0
From: St. Peters Missouri
Some of them are non-adjustable. Make sure that if you had a spacer for the firewall that you put it back in on the new one. There usually is no reason to adjust the brake light switch so the pedal will make contact. I suspect that there is a spacer issue. Also, I recently changed mine and WOW is the metal booster the way to go!!!
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Melting Slicks
Joined: Nov 2002
Posts: 2,471
Likes: 2
From: 1993 Quasar Blue 'vert Scottsdale AZ
I'm a mechanical doofus, but mine took a dump and I am going to try to tackle this one myself. I found a place where a new GM unit only costs about $30 more than an Autozone one. There have been a few posts lately concerning this.
