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Hard brake pedal

 
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Old 27 Dec 2012, 02:27 am
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Default Hard brake pedal

Brake pedal is hard in morning when cold. After I pump brakes 5or6times brakes are OK
I heard could be vacuum leak. How do I diagnose and repair?
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Old 27 Dec 2012, 07:24 am
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Default Re: Hard brake pedal

If you can hear a vacuum leak, have someone stand outside your engine to listen where it's coming from but my over-the-internet diagnostic is that your brake booster is shot. Not an easy repair but can be done if you have any mechanical experience.

They cost somewhere in the neighborhood of $75 but it's the time/labor involved from a mechanic or dealer that will run probably double that to replace the part. Mine went bad a couple years ago and now I just replaced the booster on my Corvette for the second time. This time I paid a little more and bought a new unit instead of rebuilt.

Chrysler PT Cruiser Brake Booster - Power Brake Boosters - A1 Cardone Centric - 10 09 08 07 - PartsGeek.com
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Last edited by CREWZIN; 27 Dec 2012 at 07:26 am.
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Old 27 Dec 2012, 09:18 am
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Default Re: Hard brake pedal

X2 on that!
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Old 29 Dec 2012, 11:42 pm
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Default Re: Hard brake pedal

Thanks for the info. The thing is after I pump brakes in the morning when cold they are fine all the rest of the day. This actually was like this last winter also.
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Old 30 Dec 2012, 08:02 am
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Default Re: Hard brake pedal

Check the vac lines especially the largest ones. Also the plastic connection on the vac booster for cracks or leaks.
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Old 30 Dec 2012, 08:14 am
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Default Re: Hard brake pedal

Quote:
Originally Posted by Busted_PT View Post
Check the vac lines especially the largest ones. Also the plastic connection on the vac booster for cracks or leaks.
I was thinking the same things. If no pin-holes or lose connections of the vac-lines are found, I still suggest the booster is at fault and the time interval for needing to pump the brakes will shorten. Now it's an overnight vac leak, sooner or later you'll find you'll have to pump them after it's been parked just a couple hours.
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Old 30 Dec 2012, 08:34 pm
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Default Re: Hard brake pedal

There's a one-way valve between hose and booster, it fits into a grommet on most cars booster. Could see this isn't frozen (I'm in Minnesota) up or something
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Old 31 Dec 2012, 01:31 pm
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Default Re: Hard brake pedal

Take a look at the fluid in the reservoir. It can "wear out", so to speak, and get thick and viscous. I forget if brake fluid is what is used in the clutch system or not. Brake fluid actually has an afinity for water and will absorb it from the atmosphere. It's possible for the moisture in the solution to freeze and thicken. Brake and clutch fluids are regular maintainence items and need to be changed every so often.
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Old 25 Feb 2013, 07:22 pm
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Default Re: Hard brake pedal

Hey edscrz, I have the exact same issue. (07 Touring 64K) Did you ever resolve your problem?
Thanks, Scott.
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