C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

POWER BRAKE BOOSTER

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Old Sep 28, 2003 | 08:32 PM
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Default POWER BRAKE BOOSTER

Does anyone reading this have any idea of how hard it is to replace a power brake booster in an 86 vette. I heard it was easy then I saw a picture of how the booster actually looks, and it looks as though the dash may have to come out. Also, could someone describe to me exactly how to do it and what steps are involved. Thanks


[Modified by SFU666, 8:34 PM 9/28/2003]
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Old Sep 28, 2003 | 08:35 PM
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Default Re: POWER BRAKE BOOSTER (SFU666)

Actually its pretty simple. The master cylinder just needs to be unbolted and moved aside. The hard part is the two mounting bolts that go through the firewall and under the dash. They are way up there and I had to go upside down, top off feet in the air to change them out. Now I am 6'2" and 250 so if you are a little guy it might be easier.

To summarize.... 4 bolts and a vacumn line.
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Old Sep 28, 2003 | 08:42 PM
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Default Re: POWER BRAKE BOOSTER (Southern Comfort)

What about that long plunger looking thing with the eyelet hole that I guess connects to the brake pedal? Is that in the equation at all or not?

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Old Sep 28, 2003 | 08:44 PM
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Default Re: POWER BRAKE BOOSTER (SFU666)

yes...that connects with a clip to the brake pedal
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Old Sep 28, 2003 | 08:46 PM
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Default Re: POWER BRAKE BOOSTER (Southern Comfort)

:iagree: The hardest part is lining up that plunger looking thing when putting it back together. Should take about an hour for the novice. :chevy
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Old Sep 28, 2003 | 08:52 PM
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Default Re: POWER BRAKE BOOSTER (69vetteracer)

did that job 2 weeks ago.....i am 5 10, 190 and yes it is a tight fit, goodluck! took about an hour.

when you start to get a head rush, take a break!!


let me guess brake pedal a littel hard to press......damn booster's eh?
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Old Sep 28, 2003 | 08:52 PM
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Default Re: POWER BRAKE BOOSTER (69vetteracer)

what do you have to line up? the plunger to the brake pedal? If so whats the easiest way to do that?
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Old Sep 28, 2003 | 08:54 PM
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Default Re: POWER BRAKE BOOSTER (SFU666)

it really helps if you have two people. one to hold the booster in place and one under the dash spinning the nuts. I had no problems lining it up. went right where it was supposed to. And the box it came in said it was for a Malibu....go figure.
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Old Sep 28, 2003 | 09:54 PM
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Default Re: POWER BRAKE BOOSTER (SFU666)

:iagree: It's not that complicated, but a pain in the beehaunkus. If you got a convertible, put the top down. Your, gonna be standing on your head. The hardest thing I dealt with was, I knocked my brake light switch out of adjustment. It took me a while to figure out what I moved and why my brake lights were stuck on. You just have to remove the panel under the steering wheel and struggle with the right sockets for a while. If you know what you are going for it is about a 30 minute job in the extreme.
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Old Sep 28, 2003 | 11:03 PM
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Default Re: POWER BRAKE BOOSTER (87NassauBlue)

Do you have to drain the brake fluid to do this? I need to do this on mine too.
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Old Sep 29, 2003 | 12:29 AM
  #11  
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Default Re: POWER BRAKE BOOSTER (87NassauBlue)

no....just move the master cyl out of the way. When you do it it just gently bends the brake lines a bit....goes back on real easy.

I have to get down there and re adjust my brake/cruise control switch cause now I have to pull up on the brake pedal to make my cruise work.
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Old Sep 29, 2003 | 07:21 AM
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Default Re: POWER BRAKE BOOSTER (SFU666)

Don't mean to hijack your thread but what were the symptoms that lead to replacement. My pedal went HARD yesterday. Checked vacuum lines etc...
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Old Sep 29, 2003 | 09:34 AM
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Default Re: POWER BRAKE BOOSTER (jerkyboy)

if ur pedal went hard, and its tough to get it to slow down, it could be the booster. i nailed it down to that by a whisppy loud vacuum leak that no vacuum lines could account for. I also had my friend just take a look at it who is a mechanic, and he says its the booster.
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Old Sep 30, 2003 | 11:28 PM
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Default Re: POWER BRAKE BOOSTER (SFU666)

Mine has a vacuum leak sound. especially in stop and go traffic.
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