Help! Half-shaft bolts stripped - HOW to remove?, Bolt removal |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Help! Half-shaft bolts stripped - HOW to remove?, Bolt removal |
Gatornapper |
Jan 11 2024, 09:51 AM
Post
#1
|
Senior Member Group: Members Posts: 1,235 Joined: 22-September 17 From: Woods west of Richmond, VA Member No.: 21,449 Region Association: South East States |
Should have replaced two of my bolts that hold the half-shaft to the tranny hub last time when I saw the 12 points failing.....but I didn't.
Now I've got 2 that I cannot get out and they are totally stripped in the 12-pt. center. Have good bolt remover but it won't get on the head because distance to center is too small. My small 10" pipe wrench can't get a grip on it either. Should I heat where threads are on hub? Any suggestions are greatly appreciated. Tranny ready to come off except for these two bolts. TIA, GN Pics coming shortly.... |
brant |
Jan 11 2024, 09:58 AM
Post
#2
|
914 Wizard Group: Members Posts: 11,639 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
Big vice grips and heat?
lots of kroil |
Gatornapper |
Jan 11 2024, 10:04 AM
Post
#3
|
Senior Member Group: Members Posts: 1,235 Joined: 22-September 17 From: Woods west of Richmond, VA Member No.: 21,449 Region Association: South East States |
Yes, had 12-pt bit under great pressure before rotating......bit is good, no wear on it....
(IMG:http://www.914world.com/bbs2/uploads_offsite/hosting.photobucket.com-21449-1704989098.1.JPG) (IMG:http://www.914world.com/bbs2/uploads_offsite/hosting.photobucket.com-21449-1704989098.2.JPG) 10" pipe wrench too big to fit on head... (IMG:http://www.914world.com/bbs2/uploads_offsite/hosting.photobucket.com-21449-1704989098.3.JPG) |
mepstein |
Jan 11 2024, 10:09 AM
Post
#4
|
914-6 GT in waiting Group: Members Posts: 19,313 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Air hammer/chisel. Makes short work of it.
Attached thumbnail(s) |
rudedude |
Jan 11 2024, 10:15 AM
Post
#5
|
Senior Member Group: Members Posts: 511 Joined: 1-January 05 From: minneapolis, mn Member No.: 3,387 Region Association: Upper MidWest |
Use the air hammer chisel on the edge of the bolt to spin it out as @mepstein says. If no air hammer use a sharp chisel and hammer to do the same. Worst case take your die grinder with a good cutting wheel and cut it off.
|
technicalninja |
Jan 11 2024, 10:26 AM
Post
#6
|
Senior Member Group: Members Posts: 1,326 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region |
(IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif)
He hit all the things I'd try. I've found the "trick" with 12 points (triple square for some-especially when looking for tools) is to CLEAN them out completely. Pick and air first then pick and carb cleaner then air. Medically clean before any torque is applied. Works much better when stupid clean (this is before the centers are FUBAR). Another thing that might help right now. Cut the rubber boot off and clean up all of the grease before going much further. Improve access to your playing field... Boots look old anyway. |
Root_Werks |
Jan 11 2024, 10:52 AM
Post
#7
|
Village Idiot Group: Members Posts: 8,337 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest |
Lucky that wasn't at the trailing arm side!
I've had good luck with a very good pair of vice-grips. A cheap pair doesn't usually grip well enough. Never tried the air-chisel. (IMG:style_emoticons/default/smash.gif) |
mepstein |
Jan 11 2024, 11:25 AM
Post
#8
|
914-6 GT in waiting Group: Members Posts: 19,313 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
(IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) He hit all the things I'd try. I've found the "trick" with 12 points (triple square for some-especially when looking for tools) is to CLEAN them out completely. Pick and air first then pick and carb cleaner then air. Medically clean before any torque is applied. Works much better when stupid clean (this is before the centers are FUBAR). Another thing that might help right now. Cut the rubber boot off and clean up all of the grease before going much further. Improve access to your playing field... Boots look old anyway. (IMG:style_emoticons/default/agree.gif) Cleaning them and using a good tool is the first step. |
live free & drive |
Jan 11 2024, 11:47 AM
Post
#9
|
Member Group: Members Posts: 158 Joined: 29-June 16 From: New Hampshire Member No.: 20,159 Region Association: None |
Try a Knipex Cobra - they make them down to 100mm, but longer will give more leverage.
https://www.knipex.com/products/pipe-wrench...ter-pump-pliers |
T.Rick6 |
Jan 11 2024, 11:55 AM
Post
#10
|
Member Group: Members Posts: 51 Joined: 1-October 19 From: Douglasville, Ga Member No.: 23,512 Region Association: South East States |
I would use a whiz wheel to cut a slot in the head then use a impact driver with a straight bit, smack it good. I've had to do this several times myself ,never failed to get them out.
Todd (IMG:style_emoticons/default/beerchug.gif) |
rjames |
Jan 11 2024, 12:03 PM
Post
#11
|
I'm made of metal Group: Members Posts: 3,955 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest |
I would use a whiz wheel to cut a slot in the head then use a impact driver with a straight bit, smack it good. I've had to do this several times myself ,never failed to get them out. Todd (IMG:style_emoticons/default/beerchug.gif) This gets my vote if you can't get a pair of vice grips on it. If you don't have air tools, you could use a dremel to cut a big enough slot in the head to fit a big ass flathead screw driver in it sideways and loosen it. You wouldn't have to cut the boot that way. |
Spoke |
Jan 11 2024, 02:08 PM
Post
#12
|
Jerry Group: Members Posts: 6,991 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
|
NARP74 |
Jan 11 2024, 02:27 PM
Post
#13
|
Senior Member Group: Members Posts: 1,073 Joined: 29-July 20 From: Colorado, USA, Earth Member No.: 24,549 Region Association: Rocky Mountains |
I read a note on the PMB site that they replace the 12 pt with 6 pt when they leave the shop.
|
GregAmy |
Jan 11 2024, 03:09 PM
Post
#14
|
Advanced Member Group: Members Posts: 2,311 Joined: 22-February 13 From: Middletown CT Member No.: 15,565 Region Association: North East States |
There's nothing wrong with 12-point socket heads...when used correctly. VW used them throughout the Rabbit/Scirocco line, too.
- Clean the threads - Rotate the shaft so your tools/extensions inline with the axis of the bolt - 31 ft-lbs. No more, no less - Use these: https://914rubber.com/cv-joint-bolt-m8-x-45-1-1 - And these: https://914rubber.com/schnorr-washer-for-8mm - Safety wire them - Keep a couple extra around to replace them if one gets buggered up I've never had a problem with these bolts, in any of my VW or Porsche. - GA |
brant |
Jan 11 2024, 03:55 PM
Post
#15
|
914 Wizard Group: Members Posts: 11,639 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
Definitely clean any 12 point with a pic and brake cleaner. Every time
I don’t have trouble with 12 point either |
Gatornapper |
Jan 11 2024, 04:40 PM
Post
#16
|
Senior Member Group: Members Posts: 1,235 Joined: 22-September 17 From: Woods west of Richmond, VA Member No.: 21,449 Region Association: South East States |
Many thanks to all for all the great ideas.
My thought was that an 8" pipe wrench should fit the head and the clearances. Found a nice one at my local hardware store just 4 country hiway miles away, $15 and worth every penny - and the bolts came off incredibly easy. I was planning on Dremel the heads off if the 8" didn't work. Great thing about a pipe wrench vs. vise grips is that the more torque you put on the wrench, the tighter it grips. Could not believe how easy they both came out. As always, having the right tool for the job is everything. And great tips/wisdom about thoroughly cleaning both the 12 pt. bit and the bolts before torquing. I've never used them before in almost 60 years of wrenching. I can see cleaning them as being the critical issue. Also great point in how critical correct torque is. Again, thanks for all the great ideas. GN Wrench below: (IMG:http://www.914world.com/bbs2/uploads_offsite/hosting.photobucket.com-21449-1705012849.1.JPG) |
burton73 |
Jan 11 2024, 06:13 PM
Post
#17
|
burton73 Group: Members Posts: 3,549 Joined: 2-January 07 From: Los Angeles Member No.: 7,414 Region Association: Southern California |
You will try lots of things to get this bad boy off but I am thinking that you clean the hell out of it and then squeeze a hard nut on it with a vice grip and weld it on. Remove the grips and The heat from welding should help and you should be able to get it off.
You know that you are going to dick with a number of different ways and then the satisfying sound of the nut coming loose. Good luck, Bob B |
Gatornapper |
Jan 11 2024, 06:21 PM
Post
#18
|
Senior Member Group: Members Posts: 1,235 Joined: 22-September 17 From: Woods west of Richmond, VA Member No.: 21,449 Region Association: South East States |
Bob -
Thanks! But guessed you missed the part that I got it off quite easily with a smal 8" pipe wrench. I didn't think anyone made them that small, but found one right away - perfect tool for the job - and any like it in the future. A tool I'm really glad to have now. GN You will try lots of things to get this bad boy off but I am thinking that you clean the hell out of it and then squeeze a hard nut on it with a vice grip and weld it on. Remove the grips and The heat from welding should help and you should be able to get it off. You know that you are going to dick with a number of different ways and then the satisfying sound of the nut coming loose. Good luck, Bob B |
bkrantz |
Jan 11 2024, 09:04 PM
Post
#19
|
914 Guru Group: Members Posts: 7,802 Joined: 3-August 19 From: SW Colorado Member No.: 23,343 Region Association: Rocky Mountains |
MORE TOOLS!
|
VaccaRabite |
Jan 12 2024, 12:19 AM
Post
#20
|
En Garde! Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
When I had this issue I welded some steel to the end of the stripped bolt and turned it out. Took longer to set up the welder then to free the stripped bolts.
I’ve replaced them all with Allen socket bolts. Zach |
Lo-Fi Version | Time is now: 7th June 2024 - 10:58 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |