Needed or Optional parts (Brake Job)

[ActiveLife]

My 2005 Cayenne S "brakepad workshop" message recently came on, so I checked the rotors and they seem to be in good standing condition, so I will be replacing all of the brake pads (front and rear) and the sensors (front and rear) so it's all fresh (minus rotors).

I contacted Sunset Porsche and they gave me a great quote and itemized each part needed. I let them know that I wanted to do the same job as I would get as if the dealer was doing the work, so any parts that are usually replaced, quote those out as well...

Rotors (not this time around)

Pads (absolutely)

Sensors (absolutely)

Spring/Hardware Kit - Is this needed?

Caliper Mount Bolts - are these needed for just pad replacement?

I don't have a problem with purchasing these parts, but from the DIY write-ups I saw and thinking the job through in my head, I would imagine that the Caliper Mount Bolts go untouched when just doing a pad replacement.

What about the Spring/Hardware Kit? Is this pad replacement related, or are these more items only needed if the caliper and rotor are actually removed?

I'm ready to place the order with Sunset, I just want to make sure I get everything that I need and am not going to be ordering items that don't pertain to just a Pad and Sensor replacement.

All my best!

Edited January 19, 2012 by ActiveLife

[wvicary]

Did you measure the rotor? Do they show any signs of corrosion,hot spots or pitting?

I always recommend replacing the hardware as it can be damaged from corrosion that you can't see, heat cycling or improper removal/ installation from other owners/techs.

Be sure you have the correct tools to remove the calipers if needed, brake clean and brake lub for the pad guides and such. Now is also the perfect time to flush the brake hydraulics.

P.S. Inspect for rotor corrosion not only on the pad mating surface but also where the rotor meets the spindle hub face and the cooling fins.

Edited January 19, 2012 by wvicary

[ActiveLife]

wvicary,

Thank you for the informative and helpful reply. By your advice, I'll get the hardware kit and replace the items that come within, I just wanted to make sure it was worth while, which you agree is. It also didn't dawn on me to do a brake system flush, but that sounds like a great idea as well!

Thank you again!

[Loren]

wvicary makes a good point - check the rotor thickness and wear.

Cayenne is a very heavy vehicle and does tend to wear the rotors out at the same time as the pads. Definitely worth checking.

[ActiveLife]

Loren,

Do you have the "Go - No Go" tolerance and specs for the rotors (front and rear) ? Aesthetically they are beautiful, no heat spots, pitting, corrosion, or other. There is a very minimal "lip" on the outter rim of the rotor... never-the-less, I do have micrometers, so if you know the thickness specs, I can confirm if they are worn beyond its life value.

Thank you!

[Loren]

Loren,

Do you have the "Go - No Go" tolerance and specs for the rotors (front and rear) ? Aesthetically they are beautiful, no heat spots, pitting, corrosion, or other. There is a very minimal "lip" on the outter rim of the rotor... never-the-less, I do have micrometers, so if you know the thickness specs, I can confirm if they are worn beyond its life value.

Thank you!

[wvicary]

The spec should also be stamped on the rotor hat if it's a factory style rotor.

[bigbuzuki]

Good sense in replaceing all the hardware items as suggested by Sunset ie. caliper mounting bolts and spring / hardware.

Rotors usually need to be changed every second pad replacement cycle.

Edited January 20, 2012 by bigbuzuki

[ActiveLife]

Thank you all for the great replies and advice, I am going to spend some time this weekend taking the brakes apart (not the calipers) and checking all of the thicknesses to see how I need to advance. Hardware is now a must in my mind... I'll check the thicknesses and move forward from there.

All my best!

[Ignited]

Be careful with sprays that clean brake parts especially if your calipers have the "Porsche" lettering on them. The spray will remove the stamped lettering.

Tim in Ft Worth