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1998 Lexus GS 300 Master Cylinder

Tiny
NEILGS300
  • MEMBER
  • 1998 LEXUS GS 300
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 134,000 MILES
Hi, I'm having some strange problems with my master cylinder.
My brakes work just fine, no problems at all, but the master cylinder will occasionally make high-pitched squeaky noises in rapid succession. Like squeak squeak squeak squeeeeeeek!

It's very strange, and although the brakes work properly, I don't want it to be symptomatic of further problems. Any suggestions would help! Thanks!
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Friday, February 5th, 2010 AT 4:51 PM

1 Reply

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Maybe your hearing air leakage from the, booster, vac supply line, either from a bad line or aged connection at the booster housing or fitting at engine.
Have someone apply the brakes continuously with the engine off and on while you listen and check under the hood. Move vac line around if you have to, to aid in finding/manipulating the noise to locate it.
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Thursday, October 21st, 2010 AT 7:21 PM

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