How does the vacuum brake booster work?

Orlando_87GN · 06-19-2004, 10:57 PM

I've always wondered this and thought now would be a good time to ask how this thing works. I was testing a burnt vacuum brake booster tonight ('93 Mazda) by pumping it down with the MityVac pump. I took forever, but it held vacuum just fine. Upon pushing the brake pedal in, the vacuum goes away and it sounds like it comes out the back. I did the same test on the vacuum booster on the Buick and it functions the same manner so I assume the Mazda one is probably ok.

How does this thing assist braking and is it normal for the vacuum to bleed off when applying the brakes??

Thanks!

Mick · 06-20-2004, 10:39 AM

Bet you'll get lots of answers HERE

Orlando_87GN · 06-20-2004, 02:49 PM

Very informative link! I typed in 'how do girls work' but that site doesn't know either

Mick · 06-20-2004, 07:36 PM

They're still working on it...best not to hold your breath

06-19-2004, 10:57 PM	#1 (permalink)
Orlando_87GN Resident Idiot Join Date: Sep 2000 Location: Orlando, FL USA Posts: 11,442	How does the vacuum brake booster work? I've always wondered this and thought now would be a good time to ask how this thing works. I was testing a burnt vacuum brake booster tonight ('93 Mazda) by pumping it down with the MityVac pump. I took forever, but it held vacuum just fine. Upon pushing the brake pedal in, the vacuum goes away and it sounds like it comes out the back. I did the same test on the vacuum booster on the Buick and it functions the same manner so I assume the Mazda one is probably ok. How does this thing assist braking and is it normal for the vacuum to bleed off when applying the brakes?? Thanks! __________________ Check Out MikesStuff4Sale.com to view my used parts! ------------------------------------------------ 1987 Buick Grand National Budget 4.1, 204/214 cam, TA-49 Turbo, Stockish Heads, V4, MSD50's, TH DP, JayJackson 62mm TB, Translator plus Extender powered. 3680# with pilot ------------------------------------------------ 1993 Mazda RX-7 4.1 Buick Powered 11.20 @ 128mph (2.4 60')!

06-20-2004, 10:39 AM	#2 (permalink)
Mick Registered User Join Date: Oct 2003 Location: Texas Posts: 86	Bet you'll get lots of answers HERE __________________ Mickey 1987 GN

06-20-2004, 02:49 PM	#3 (permalink)
Orlando_87GN Resident Idiot Join Date: Sep 2000 Location: Orlando, FL USA Posts: 11,442	Very informative link! I typed in 'how do girls work' but that site doesn't know either __________________ Check Out MikesStuff4Sale.com to view my used parts! ------------------------------------------------ 1987 Buick Grand National Budget 4.1, 204/214 cam, TA-49 Turbo, Stockish Heads, V4, MSD50's, TH DP, JayJackson 62mm TB, Translator plus Extender powered. 3680# with pilot ------------------------------------------------ 1993 Mazda RX-7 4.1 Buick Powered 11.20 @ 128mph (2.4 60')!

06-20-2004, 07:36 PM	#4 (permalink)
Mick Registered User Join Date: Oct 2003 Location: Texas Posts: 86	They're still working on it...best not to hold your breath __________________ Mickey 1987 GN

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