21 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHI'd like to punch...
Leading reported evidence
Replace rotors more than i care
Performed · outcome unconfirmed
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1
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Performed · outcome unconfirmed
Between my CAB and my GT3 I have changed rotors more than I care to remember (alot of track events) and never have I had a problem with the 2 set screws on the rotor face.
Leading evidence: 'Replace rotors more than i care' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'correct size' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Replace into a weekend hassle' (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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Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed · Original poster
I used PB blaster as well, but to be fair that was after the screws began stripping with the impact driver.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that suspect a cause
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Suspected cause · Original poster
It's possible, but I believe it was the correct size.
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Replace into a weekend hassle
Suggestion or failed attempt
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Unsuccessful attempts
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Discussions that contain suggestions
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Suggestion · Original poster
It turns a 20 minute pad and rotor change into a weekend hassle when those little bitches strip.
Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed
Between my CAB and my GT3 I have changed rotors more than I care to remember (alot of track events) and never have I had a problem with the 2 set screws on the rotor face.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Between my CAB and my GT3 I have changed rotors more than I care to remember (alot of track events) and never have I had a problem with the 2 set screws on the rotor face.
Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.
Coverage and how to read this overview
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
21 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 1 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T200546Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
the Porsche engineer that decided we need screws to hold the rotor in place prior to mounting the wheel.
A) Nobody else needs screws holding the rotor on, why do we?
B) If you are going to put a screw in, maybe we could use something harder to strip than a phillips?
It turns a 20 minute pad and rotor change into a weekend hassle when those little bitches strip. I've tried an impact driver, a screw extractor (not the type you drill a pilot hole for) and neither have gotten them out. Up next, a traditional screw extractor...good thing I've got an extra week before my next track day.
End Rant.
I always use a impact screw driver to take those out, anything other method for sure you will strip it.
Sears sell these impact screw drivers, basically you put the screw driver on the screw you want to loosen turn it so there is no slack against the counterclockwise direction, and then hit it with a hammer. Works everytime. The impact force drives the screw driver in a counterclockwise rotation and loosen the screw without drama.
I usually spray with PB Blaster before working on machine screws on calipers, rotors, headers, exhaust, etc. It helps most of the time. Then put anti-seize when reinstalling.
Believe me guys, I started with the sears impact driver... When it didn't do the trick I knew I was in for a ride... I used PB blaster as well, but to be fair that was after the screws began stripping with the impact driver.
Bingo!
Between my CAB and my GT3 I have changed rotors more than I care to remember (alot of track events) and never have I had a problem with the 2 set screws on the rotor face. You don't even need to put them on tightly when you put your new rotor on.
That screw, though an allen head, on my 530i was the only thing that came off easily. The rotor was bonded to the hub with rust. A can of PB blaster, a week of soaking, an 8 inch gear puller, and a mallet were needed to get those things off. I feel your pain
Penetrating oil really helps. Put some on, go inside and have a cold drink, then go back out to the garage & take out the screws. I had hell getting them out till I tried it. And don't even bother with WD40. It will do nothing. Ask me how I know...
lol
Come one, that's not so bad. And the older I had to deal with was a '79 SC which was rusted to bones.
>That screw, though an allen head, on my 530i was the only thing that came off easily
lol again.
Same on my 530. A real pain.
It's possible, but I believe it was the correct size. The 50k miles of oxidation and the potential for the previous owner to have over-torqued them is more likely though...
I'll pick up some new screw extractors tonight and see how things go...
Did you try a little localized heat? I know a little propane torch isn't a lot of heat but it helps.
Of course, a cutting torch is best for freeing stubborn hardware.
Like Dell I've done this dozens of times with no trouble but I have stripped a couple. No need to mess around with extraction tools. Just drill it out. The head will pop off right away and there will be a quarter of an inch of the screw's shaft sticking out after you remove the rotor. Without the rotor binding it it's very easy to remove. Five minutes max.
I hadn't thought of that...I'll give it a shot tonight. Thanks for the great tip. I had visions of breaking a hardened extractor off in screw and really making life difficult.
Update: Jim's advice worked perfectly. I used a 1/4" bit and probably could have gone a bit bigger to be safe.
The screws on the other rotor came out with no problem and I finished the job last night. Thanks for listening to me complain and for the good advice on fixing the problem.
