5 lug rear rotors |
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5 lug rear rotors |
jmargush |
Mar 25 2024, 04:18 PM
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#1
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Member Group: Members Posts: 458 Joined: 8-June 04 From: Goshen, IN Member No.: 2,176 |
Are the 5 lug rear rotors supposed to use the 2 small screws to mount them to the hub or does the wheel just hold them to the hub?
Attached thumbnail(s) |
mepstein |
Mar 25 2024, 05:22 PM
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#2
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914-6 GT in waiting Group: Members Posts: 19,253 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
The screws will hold it but not really a problem if the screws don’t line up or they are broken off in the hole. If the lug nuts/bolts are torqued, that’s all you really need.
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jmargush |
Mar 25 2024, 06:28 PM
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#3
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Member Group: Members Posts: 458 Joined: 8-June 04 From: Goshen, IN Member No.: 2,176 |
Funny
Both hubs and rotors are from PMB but the holes for the screws don't line up. |
sixnotfour |
Mar 25 2024, 06:31 PM
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#4
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914 Wizard Group: Members Posts: 10,418 Joined: 12-September 04 From: Life Elevated..planet UT. Member No.: 2,744 Region Association: Rocky Mountains |
Did you rotate the rotor on studs to confirm ???
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jmargush |
Mar 25 2024, 07:43 PM
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#5
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Member Group: Members Posts: 458 Joined: 8-June 04 From: Goshen, IN Member No.: 2,176 |
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mepstein |
Mar 25 2024, 08:18 PM
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#6
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914-6 GT in waiting Group: Members Posts: 19,253 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
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rgalla9146 |
Mar 25 2024, 09:03 PM
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#7
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Advanced Member Group: Members Posts: 4,545 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None |
I have some opposite info to offer. Mark is right, countersunk slot screws do hold the rotor to the hub but ar not really necessary when the wheel is torqued on. Opposite ? There are two other threaded holes on the rotors (8x1.25) that are to assist in removing rusted on rotors. Thread a bolt in them and it will push the rotor off the hub. Voila ! |
mepstein |
Mar 25 2024, 09:12 PM
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#8
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914-6 GT in waiting Group: Members Posts: 19,253 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
I have some opposite info to offer. Mark is right, countersunk slot screws do hold the rotor to the hub but ar not really necessary when the wheel is torqued on. Opposite ? There are two other threaded holes on the rotors (8x1.25) that are to assist in removing rusted on rotors. Thread a bolt in them and it will push the rotor off the hub. Voila ! (IMG:style_emoticons/default/beerchug.gif) |
fixer34 |
Mar 25 2024, 09:42 PM
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#9
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Senior Member Group: Members Posts: 1,076 Joined: 16-September 14 From: Chicago area Member No.: 17,908 Region Association: Upper MidWest |
I believe it is easier to set the pad distance with the countersunk screw holding the rotor tight to the hub. The other option is to put spacers on a couple of the hub bolts and snug up a couple lug nuts.
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Steve |
Mar 26 2024, 07:58 AM
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#10
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914 Guru Group: Members Posts: 5,570 Joined: 14-June 03 From: Orange County, CA Member No.: 822 Region Association: Southern California |
Are they drilled hubs? Curious if those have an issue. I have always used 911 hubs, nothing drilled. Never had a problem with them lining up.
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76-914 |
Mar 26 2024, 08:05 AM
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#11
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,494 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California |
IIRC, Eric addressed that in one of his writings. I've read so many lately I can't remember which article says that if you use "X" then this will occur. (IMG:style_emoticons/default/confused24.gif)
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Olympic 914 |
Mar 26 2024, 08:32 AM
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#12
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Group: Members Posts: 1,662 Joined: 7-July 11 From: Pittsburgh PA Member No.: 13,287 Region Association: North East States |
I believe it is easier to set the pad distance with the countersunk screw holding the rotor tight to the hub. The other option is to put spacers on a couple of the hub bolts and snug up a couple lug nuts. (IMG:style_emoticons/default/agree.gif) |
dr914@autoatlanta.com |
Mar 26 2024, 11:12 AM
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#13
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914 Guru Group: Members Posts: 7,832 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
we use 914-6 rear rotors line up just fine
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jmargush |
Mar 26 2024, 12:42 PM
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#14
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Member Group: Members Posts: 458 Joined: 8-June 04 From: Goshen, IN Member No.: 2,176 |
Hubs and rotors are from Eric.
914-4 hub for 914 (not 914-6) and 5-lug machines rotor for 914-4 so I assumed they would line up. At any rate I agree that the wheel holds the rotor on so I will just proceed that way |
willieg |
Mar 26 2024, 05:40 PM
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#15
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Member Group: Members Posts: 130 Joined: 13-August 18 From: Pleasant Hill Member No.: 22,389 Region Association: Northern California |
I had the same problem with the screw holes in the rotor not lining up with the tapped screw holes in the hub. I drilled and tapped the hubs, instead of just drilling new holes in the rotors. I figured I would need new rotors before new hubs.
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jmargush |
Mar 26 2024, 08:22 PM
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#16
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Member Group: Members Posts: 458 Joined: 8-June 04 From: Goshen, IN Member No.: 2,176 |
I had the same problem with the screw holes in the rotor not lining up with the tapped screw holes in the hub. I drilled and tapped the hubs, instead of just drilling new holes in the rotors. I figured I would need new rotors before new hubs. Good to know someone else had the same problem |
technicalninja |
Mar 26 2024, 08:35 PM
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#17
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Senior Member Group: Members Posts: 1,173 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region |
It may have something to do with re-purposing 914 parts to run 5 lug.
I got 914-6 rotors and the Euro 5 lug flanges for 914 stubs and the rotor retention screws lined up fine. |
Montreal914 |
Mar 26 2024, 09:26 PM
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#18
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Senior Member Group: Members Posts: 1,544 Joined: 8-August 10 From: Claremont, CA Member No.: 12,023 Region Association: Southern California |
Added piece of information concerning rear rotors... (IMG:style_emoticons/default/smile.gif)
914/4: Diameter: 282mm Thickness: 9.4mm 914/6: Diameter: 286mm Thickness: 10.4mm |
JamesM |
Mar 26 2024, 09:57 PM
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#19
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Senior Member Group: Members Posts: 1,894 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
When the 4 lug hubs/rotors are converted to 5 lug one of the existing 4 lug holes is used and 4 additional ones machined. If during the machining process the the same hole isnt retained in both the rotor and the hub then the rotor retaining screw hole wont be in the same orientation.
As stated its more of a convenience thing as once the wheel is installed the retaining screw just sits there and rusts so you should be fine to run it either way. May or may not be something that is on PMBs radar. You would need to ask them to determine if this was a mistake or just something they don't account for. are you seeing the same issue with both rotors/hubs? @Eric_Shea |
jmargush |
Mar 27 2024, 02:30 AM
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#20
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Member Group: Members Posts: 458 Joined: 8-June 04 From: Goshen, IN Member No.: 2,176 |
When the 4 lug hubs/rotors are converted to 5 lug one of the existing 4 lug holes is used and 4 additional ones machined. If during the machining process the the same hole isnt retained in both the rotor and the hub then the rotor retaining screw hole wont be in the same orientation. As stated its more of a convenience thing as once the wheel is installed the retaining screw just sits there and rusts so you should be fine to run it either way. May or may not be something that is on PMBs radar. You would need to ask them to determine if this was a mistake or just something they don't account for. are you seeing the same issue with both rotors/hubs? @Eric_Shea Yes I saw it on both rotors/hubs. Great explanation as to probably what happened. I called PMB and they basicallyb said the same thing, that the bscrews aren't really needed. |
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