Problems after replacing master cylinder

Mark · 2010-04-06T01:33:16+00:00

Hi, I have a lexus es300 with 128K miles. I had taken my car to the mechanic as I felt the brakes needed work. I had to press the brake pedal all the way down to stop the car. The mechanic suggested replacing the master cylinder which I did. Now, I have 2 unique problems and I am looking for advice here to educate myself before I take the car back to the mechanic. 1. The brake pedal sometimes works just by a little pressing, and other times I need to press it all the way down. In other words, sometimes it brakes just by a slight touch of the foot and sometimes it doesn't. The brakes work, just that the "firmness" of the pedal keeps changing. 2. The car starts vibrating after driving for about 10 minutes on the highway. The vibration doesn't start right away. There is vibration in the car and the steering. When I brake, I get the pulsating feeling with the brake pedal. All the passengers in the car can feel the vibration. After about 15 minutes of driving, the vibration goes away and doesn't come back during the same ride. If I park the car, let it cool and drive again, then the same pattern repeats. Could the experts here give some insight into what the possible issues could be? The advice here has always helped me in the past and look forward to your opinion. Thanks and regards, Mark

Apr 06, 2010 41 Replies

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jim 16 years ago

Yup that is what it boils down to. For instance, when someone says they only use OEM parts and also claims to have vast experience with poor quality after-market parts it does make one wonder if those statements are fact or fiction.

-jim

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jim beam 16 years ago

don't put put bullshit twisted illogical words in my mouth. well, not unless you can delude yourself that it doesn't make you look stupid, in which case, feel free to keep ranting.

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