Planet-9 > 987 Discussion Group (Cayman/Boxster) > Cayman and Boxster Tech » How to tell when to replace brake pads?


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Old 01-26-2009, 04:21 AM
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How to tell when to replace brake pads?

Hi guys I have never replaced brake pads myself on my cars. How do I know when to replace the pads without having the sensors come on? (which according to the people on this board, will ruin the sensors).

I have 30,000 miles on my CS daily driver, and I have yet to require a brake pad change. No track use. Also is there any other brake pad that is better than the standard factory Porsche brake pads for daily driving?
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Old 01-26-2009, 04:47 AM
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Re: How to tell when to replace brake pads?

Originally Posted by caunyd View Post
Hi guys I have never replaced brake pads myself on my cars. How do I know when to replace the pads without having the sensors come on? (which according to the people on this board, will ruin the sensors).

I have 30,000 miles on my CS daily driver, and I have yet to require a brake pad change. No track use. Also is there any other brake pad that is better than the standard factory Porsche brake pads for daily driving?
For You - For Daily Driving - There is No Better Pad, Than the Porsche Pad.

To Be Honest............... Get A Friendly Auto Mechanic to 'Look and See' if you need to replace your pads, before they hit the Wear Indicators.........

Probably - He will tell you - Change them Now - @ 30,000 Miles - You have had good service from them....

Pad Replacement is not too expensive............
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Old 01-26-2009, 05:00 AM
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Re: How to tell when to replace brake pads?

+1 on what Karel said, although I'd check them myself!
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Old 01-26-2009, 09:17 AM
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Re: How to tell when to replace brake pads?

I agree with Karel, too. the OEM pad for the street is very good, and is not prone to making any noise.

As far as how to tell you need a change - The pad material starts out at 10mm in thickness - the sensors come on at around 2mm. Take a flashlight and you can take a look yourself. Normally, the fronts will wear faster than the rears. If you do get into the sensors, it's not the end of the world - a set of sensors is about $50 from sponsor Suncoast Porsche.

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Old 01-26-2009, 11:12 AM
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Re: How to tell when to replace brake pads?

Do you know how/where to look to see the thickness of the pads? Get a flashlight, and sometimes a mechanic's mirror (a mirror on the end of a stick) can help. Look into your brake calipers, right where the rotor is. The part that contacts the rotor is the pad itself. The backing plate of the pad is about 2mm, so in general terms, if the pad is about as thick as the backing plate, it's getting near the time to replace them.

Check out these articles on replacing the pads. None of the pictures are at quite the right angle to duplicate what you see when you check your pads for wear, but they will give you some idea what to look for.

41.JPG - My Articles
Porsche Hawk Porterfield Pagid - My Articles


But like Brad said above, wearing into your sensors is no big deal at all. They are not that much extra to replace them. The insulation on them tends to dry out and crack anyways, just due to the heat from the brakes, to replacing them is not a bad idea anyways. Plus, if you replace your pads too soon, you are loosing money on pad wear, and that could easily cost you more than the cost of the sensors.
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Old 01-26-2009, 11:57 AM
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Re: How to tell when to replace brake pads?

OEM is best all around for street use. Silent. Waxy dust, though.
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