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Author Topic: 69 camaro brakes  (Read 2565 times)

wisemanz28

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69 camaro brakes
« on: July 23, 2019, 08:41:35 PM »
Lately I noticed my brake pedal is really hard when using the brakes, also sometimes I here a groaning noise when pushing on the pedal. The car stalled a few times when stopping. I haven't checked anything out yet but wanted to get some tips on what I should be looking for. 
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bertfam

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Re: 69 camaro brakes
« Reply #1 on: July 23, 2019, 08:45:39 PM »
Booster or a leak in the vacuum system going to the booster.

Ed
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ZLP955

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Re: 69 camaro brakes
« Reply #2 on: July 24, 2019, 12:01:40 PM »
What Ed said.
Let the engine idle for a minute or two, depress brake pedal, then switch engine off keeping foot pressure on the brake; if pedal doesn't hold position, there's a leak in the manifold, hose, check valve or internally in the booster.
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Tim in Australia.
1969 04A Van Nuys Z/28. Cortez Silver, Dark Blue interior, VE3, Z21, Z23, D55/U17, D80, flat hood.
Sold at Clippinger Chevrolet in Covina, CA.
AHRA Formula Stock at Lions Dragstrip, NHRA E/MP at Pomona Raceway

wisemanz28

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Re: 69 camaro brakes
« Reply #3 on: July 25, 2019, 02:04:38 AM »
I started the car up today and at idle I revved it up and when I gained rpm,s the brake pedal depressed down , when I let it go back to idle the pedal raised up and got very hard again. Checked the vacuum hose and check valve and they looked good . Any way to check the brake booster?
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ZLP955

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Re: 69 camaro brakes
« Reply #4 on: July 25, 2019, 10:41:53 AM »
Definitely sounds like the booster. Pump the brake pedal 5 or 6 times with the engine off, to deplete vacuum. Then push down on the brake pedal with moderate pressure, and start the engine; if the pedal drops (1/4"-1/2") that suggests the booster is functioning correctly.
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Tim in Australia.
1969 04A Van Nuys Z/28. Cortez Silver, Dark Blue interior, VE3, Z21, Z23, D55/U17, D80, flat hood.
Sold at Clippinger Chevrolet in Covina, CA.
AHRA Formula Stock at Lions Dragstrip, NHRA E/MP at Pomona Raceway

wisemanz28

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Re: 69 camaro brakes
« Reply #5 on: July 28, 2019, 02:07:20 PM »

I suspect the brake booster is the problem, who would you guys suggest I send it to for a rebuild ?
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69Z28-RS

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Re: 69 camaro brakes
« Reply #6 on: July 28, 2019, 10:26:22 PM »
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09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette, '60 Corvette, '72 Corvette
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan
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