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how do you know if your brake booster/m.cylinder is broken?

Old Jul 7, 2003 | 12:41 PM
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From: San Hose Jose
Default how do you know if your brake booster/m.cylinder is broken?

anybody??


thanks!!!! :goodjob:
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Old Jul 7, 2003 | 02:38 PM
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If you're leaking fluid from the MC or if there's a vaccum leak on the booster... you'd need a vaccum tester, and you can do a visual check for a fluid leak.
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Old Jul 8, 2003 | 09:47 AM
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Originally posted by Bakeoff
If you're leaking fluid from the MC or if there's a vaccum leak on the booster... you'd need a vaccum tester, and you can do a visual check for a fluid leak.

those this include a small amount of fluid found where the booster and mc attach? i can't see or feel for any lost air around the booster. thanks!!

:thumbup:
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Old Jul 8, 2003 | 10:06 AM
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broken booster would require you to push harder on the brake to make it go down.

if by broken master cylinder, you mean the seal, then your brake will feel mushy (as if there is air in it) since brake fluid would leak (internally) past the seal.
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Old Jul 8, 2003 | 10:20 AM
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take the caliper off and use a "C" clamp on the MC to see if there's pressure. Plus, takin off the calliper will let you inspect it easier. Two bolts, literally two minutes.
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Old Jul 8, 2003 | 10:24 AM
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If you pull the hose that goes from the vacuum booster to the intake maifold off the vacuum booster and your idle goes up that is one indication your booster is ok. Another way is to push your brakes down with the car off, then hold the brake pedal down and start the car. The pedal should move when the car starts because vacuum pressure is assisting the brakes.

Usually when master cyl. goes bad it leaks on the booster, sometimes (very rare) into the vacuum booster. Just a small amount of fluid under the mounting point of the master cylinder/vacuum booster is not bad, just keep an eye on it. The master cylinder should be replaced if you brakes are mushy and you have ruled out other brake components or the fluid leak spreads.
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Old Jul 8, 2003 | 10:48 AM
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Kimbo cut your brake line
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Old Jul 8, 2003 | 04:03 PM
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Originally posted by Duff Man
Kimbo cut your brake line
hahaha..good one!!
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Old Jul 8, 2003 | 08:47 PM
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well looks like you guys don't need anymore advice, laubo, these guys know what their talking about
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