Planet-9

Reuse brake caliper mounting bolts

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YOUR RESEARCHReuse brake caliper mounting bolts

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Check with my local

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I checked with my local
Original post Read captured discussion
Reuse brake caliper mounting bolts

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Leading evidence: 'Check with my local' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check with my local' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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Replace every time - i reused my mine several times

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stipulates that the bolts need to be replaced every time - I reused my mine several times before installing the Rennline stud kit.
Original post Read captured discussion
Reuse brake caliper mounting bolts

Replace front pads

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I just replaced the front pads on my 981C and reused the bolts since they are not torque to yield.
Original post Read captured discussion
Reuse brake caliper mounting bolts

Replace fronts

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I replaced my fronts with studs due to frequent pad changes.
Original post Read captured discussion
Reuse brake caliper mounting bolts

Replace with studs and nuts by the racers is

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The reason the bolts are replaced with studs and nuts by the racers is that the aluminum hub carrier will eventually strip the threads in the bolt hole, which is less than ideal.
Original post Read captured discussion
Reuse brake caliper mounting bolts

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Check with my local

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I checked with my local
Original post Read captured discussion
Reuse brake caliper mounting bolts

Replace bolts

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Suggestion
I do know that racers, who pull the calipers all the time, replace the bolts with a stud and a nut.
Original post Read captured discussion
Reuse brake caliper mounting bolts

Replace every time - i reused my mine several times

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stipulates that the bolts need to be replaced every time - I reused my mine several times before installing the Rennline stud kit.
Original post Read captured discussion
Reuse brake caliper mounting bolts

Replace front pads

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I just replaced the front pads on my 981C and reused the bolts since they are not torque to yield.
Original post Read captured discussion
Reuse brake caliper mounting bolts

Replace fronts

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Discussions that performed work without a confirmed outcome: 1

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I replaced my fronts with studs due to frequent pad changes.
Original post Read captured discussion
Reuse brake caliper mounting bolts

Replace rotors

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Suggestion
independent shop in LA replace the rotors with some almost new ones, they reused the bolts with some
Original post Read captured discussion
Reuse brake caliper mounting bolts

Replace with studs and nuts by the racers is

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The reason the bolts are replaced with studs and nuts by the racers is that the aluminum hub carrier will eventually strip the threads in the bolt hole, which is less than ideal.
Original post Read captured discussion
Reuse brake caliper mounting bolts

Tighten process, since torque isn't reliable

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Suggestion
Stretch bolts (also known as torque to yield) typically have a "turn of the nut" tightening process, since torque isn't reliable when they are stretching.
Original post Read captured discussion
Reuse brake caliper mounting bolts

Use once shouldn't be a problem

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Suggestion
Re-using once shouldn't be a problem.
Original post Read captured discussion
Reuse brake caliper mounting bolts

Use only

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Suggestion
states that bolts are 1-time use only.
Original post Read captured discussion
Reuse brake caliper mounting bolts

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9 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

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POST 1Original post

I am removing my brake c.alipers to service rotors. Porsche states that bolts are 1-time use only. I checked with my local Porsche and the tech I talked to could only say that they replace them any time they are removed . Are they a stretch bolt to be only torqued once? I removed 1 and did not see any lock-tite,etc on the treads. Don't mind buying new ones if necessary but would like to know why! Thanks

POST 2Original post

I cannot delve into the mindset of Porsche when they make these requirements. I'm a mechanical engineer and I stayed at a Holiday Inn so my 2 cents worth would say that are not a stretch bolt. Stretch bolts (also known as torque to yield) typically have a "turn of the nut" tightening process, since torque isn't reliable when they are stretching. These do not have a turn of the nut requirement. So I would guess that the OEM bolts come with the pre-applied coating for locking purposes and it is the coating that is one time use. And they are a critical safety item. As removing the calipers is rare for a daily driver, I agree just replace them and sleep better at night. I do know that racers, who pull the calipers all the time, replace the bolts with a stud and a nut. Again, evidence that it is not a stretched fastener.

POST 3Original post

Thanks for the info- I have them on order but was curious as to why needed. I purchased my 08 Boxster last summer with low kms( 28000) and limited service history other than annual oil and filter service . This winter I am getting all the maintenance done as a 15 year old Boxster should have . Thanks again

POST 4Original post

I just replaced the front pads on my 981C and reused the bolts since they are not torque to yield. Shawn in VA (USA)

POST 5Original post

The reason the bolts are replaced with studs and nuts by the racers is that the aluminum hub carrier will eventually strip the threads in the bolt hole, which is less than ideal. I'm not sure why Porsche stipulates that the bolts need to be replaced every time - I reused my mine several times before installing the Rennline stud kit.

POST 6Original post

I've both replaced and reused bolts on my '11 Cayenne Turbo. The first time I did pads on it - it got new bolts from Porsche . The second time I had a noted Porsche independent shop in LA replace the rotors with some almost new ones, they reused the bolts with some blue Loctite smeared on them. Anecdotal results - the calipers haven't fallen off yet.

POST 7Original post

Those caliper bolts will stretch slightly when torqued. Re-using once shouldn't be a problem. Re-using them many times and eventually the bolts can deform enough to cause the aluminum carrier to strip or the bolts to give. Porsche prescribes changing them every time because you don't always know the history and how much usage is too much. I just saw a picture posted on a BMW facebook forum last week where a caliper bolt became severely deformed under torque. Don't know the history there. You can buy the bolts from FCP euro and just get new ones every time for free thereafter. I replaced my fronts with studs due to frequent pad changes. Every time I track the car I swap out for track pads.

POST 8Original post

I've gone the FCP Euro route and am currently on my 2nd free set. No hassle lifetime warranty.

POST 9Original post

If you know what you are doing you do not have to replace them every time. Not sure - go the FCP route.

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