Mechanics

LEXUS GS 400 NOISE PROBLEM

1999 Lexus GS 400 • 155 miles

When turn on key after sitting overnight, brake booster makes squeaking sound as it pumps up. This lasts only seconds. Seems to be increasing in frequency. Is this serious? What is cause? Solution?
Thanks
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Jcone
March 11, 2013.




Its difficult to hear what you hear from here, but it does seem to be unusual. Perhaps the booster will require replacement, I am not sure, but it might be a possibility.

Dr. Hagerty
Mar 11, 2013.
On another site it was suggested that the vac line from the booster might be leaking, or its fitting might. It also suggested I move the line around with sound occurring to see if this could be confirmed. ANy thoughts about this?
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Tiny
Jcone
Mar 11, 2013.
It may just be a dry dust seal, is the noise constant or only when the pedal is pressed?

Mhpautos
Mar 12, 2013.

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