Anyone who has changed their 991 brake pads knows that you need to remove two large caliper bolts per caliper in order to slide the caliper off the rotor and change the pads. (The back side of the caliper is "closed" so the pads will not slip out that way as they did on most older Porsches.)

It can be a bit of a chore to replace those bolts because they are tough to line up and get threaded into the aluminum strut housing. The threads are quite fine and relatively hard to see back there, too. And it's not something you want to mis-thread! This may not be a big deal if you rarely need to change your brake pads, but for those of us who do so regularly for track days it's really inconvenient and risky regarding wearing out/stripping threads.

Apparently owners of new Caymans have this same issue (at least on their front calipers) and I understand 997 GT3's have been this way for a while. Many owners have converted to studs which are seated into the aluminum housings. The calipers are easily slid over the studs and then attached with nuts on the end. The advantages include less risk of stripping the aluminum housing and ease of positioning the caliper. One of the companies offering this conversion is linked here. There may be others, I just haven't found them yet.

http://www.tarett.com/items/986-987-...csk-detail.htm

Has anyone here done this yet?

 

Been thinking about it.

Rennline sells them also...
http://www.rennline.com/Brake-Calipe...nfo/CS%2DBCSK/

 

Thanks for the link. Looks like the exact same product and price. They don't seem to list the 991 for some reason.

 

991 Factory Bolts F & R are:
M12x1.5x85

So the 85's seem to be the ones to order.
Which is what they list for 981 F, which are 77 or 85.

 

Tarett engineering check this out http://www.tarett.com/items/991-981-...csk-detail.htm

 

I ordered a set today from Tarret. I'll let you know how it works out. BTW, the folks at Tarret were very friendly and responsive to questions about their products.

 

Awesome -- I'm definitely curious.

I miss the old retaining pin design. It's a big reason I don't go to the track as much anymore. Changing the pads back and forth on the current design is too big a hassle to do regularly.

 

BradB could you post a picture of the pins you need to remove. Have not yet owned the car long enough to replace a brake pad yet.

 

Check this thread.

https://www.6speedonline.com/forums/...placement.html

In the third photo you will see the ends of two large bolts that hold the caliper. (On the inside) These bolts are replaced with studs that a have nuts on the end of them. You then slide the caliper over the studs and tighten the end nuts, as opposed to threading in the long bolts rather blindly into the aluminum housing.

 

Anyone try these out yet and can offer a review?

 

The studs are the only way to go if you track your car, otherwise you hog out the hole with the bolt and then you need to replace the entire strut.

 

I am confused since I just replaced my pads and rotors and had no issues or hardship with the project. I actually thought it was pretty easy


I'll read his thread more carefully later

 

My mistake. I guess this is for the 991. For those with 997, I found that similar ease can be had by removing 2 nut and bolt.

https://www.6speedonline.com/forums/...dt-l-info.html

I will still read this thread since 1) I still don't know how much faster those bolts will make the job easier and 2) I might have a 991 in a few years.

 

The ease of removing the bolts is not the issue, it is the wear on the internal threads that this creates over time. You only get so many insertions of the bolt period. See this thread http://rennlist.com/forums/991-gt3/8...d-journal.html

 

Dang! That's 50+ pages. So even with correct torque tools and settings, the female threads can only support so many insertions?

Ala Madonna? Jk. My apologies for the humor.