Sounds good to me Tank! No need to change anything...glad I could contribute.Thanks @RugbyRef . I’ll add a link to your post titled “OEM Wheel and Tire Specs” unless you’d prefer something different.
Here's the pic from the "16 Helm. Does NOT show them being discarded so I would think that means they are reusable...New part number for rear brake caliper bolts: W719117-S439
I am still getting conflicting information on whether or not these are single-use. Two dealerships have told me they re-use and loc-tite the existing bolts. Does anyone have anything official from Ford from a service manual or other source that confirms these should be discarded once the calipers are removed?
https://parts.lakelandford.com/p/Ford__/Caliper-Bolt-HEX-Mount/68008376/W719117S439.html
Those are for the fronts only.But why not use the stud replacements? Then you won't have to replace the bolts every time or worry about it:
https://www.opmustang.com/store/p272/Caliperfexion_CT10_4340_Stud_Kit_.html#/
The one time use comes from Ford. You would be surprised how many bolts the service procedure call for replacement. That being said to reuse or install another set of stock bolts is foolish. I believe the torque spec is 125 foot pounds into the aluminum steering knuckle. Those Caliperflexion studs are the way to go. Especially if you track your car.Well, these guys seem to think they are one time use, but then again, they sell parts:
https://lmr.com/item/LRS-2200B350/mustang-shelby-gt350-r-replacement-front-caliper-bolts-15-17
But why not use the stud replacements? Then you won't have to replace the bolts every time or worry about it:
https://www.opmustang.com/store/p272/Caliperfexion_CT10_4340_Stud_Kit_.html#/
Wasn’t the original question about the rear caliper bolts?The one time use comes from Ford. You would be surprised how many bolts the service procedure call for replacement. That being said to reuse or install another set of stock bolts is foolish. I believe the torque spec is 125 foot pounds into the aluminum steering knuckle. Those Caliperflexion studs are the way to go. Especially if you track your car.
Caliperfexion is only in the stud business and since the rear calipers are a "side mount" you can only use a bolt.@Epiphany .... does Caliperfexion market replacement bolts for the rear calipers?
Wait, so you're saying they're not TTY? Is this definitive? Others supposedly in the know, say it is TTY. How do we know definitively?... In the case of the GT350, the fasteners at the front and rear calipers are not TTY.
I believe the big reason Caliperflexion has studs for the front is due to the fact that every time you need to replace brake pads the caliper bolt must be removed. If you track that can be very often. Caliperflexion makes a great product to elevate a known issue. However the rear the bolts do not have to be removed to replace brake pads. Therefore is there really an issue for them to address? You are correct about the mixed metals but is there a big enough demand for them to market replacement studs for the rear?Wait, so you're saying they're not TTY? Is this definitive? Others supposedly in the know, say it is TTY. How do we know definitively?
Personally, I think going with the studs is a good ideal just because I think over time, the mixed metals of the bolts and aluminum knuckle will fuse together, especially on low mileage cars that may not have those bolts replaced often. This happened to my 911 and I wound up needing an entire new hub assembly just to finish a brake job.
Unless someone knows of a down side to the studs, I think that's the way to go so they never need to be removed for the life of the car.