Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
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.
 

Welcome Guest ( Log In | Register )

> Can flywheel bolts be reused?
914mikee100
post Oct 1 2013, 03:03 PM
Post #1


Newbie
*

Group: Members
Posts: 42
Joined: 20-July 12
From: Utah
Member No.: 14,702
Region Association: None
The bolts that came with my new flywheel are way too short to work. Can I reuse my old bolts or is that not done?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
 Reply to this topicStart new topic
Replies(1 - 14)
gunny
post Oct 1 2013, 03:32 PM
Post #2


Member
**

Group: Members
Posts: 205
Joined: 17-October 12
From: Madison Al
Member No.: 15,051
Region Association: South East States
The correct answer would be to use new bolts. I just but on my flywheel with new clutch last weekend and the old bolts look great but I used new bolts not that expensive. I would guess that many use the old bolts. Mak sure you use a new washer plate and felt washer.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Cap'n Krusty
post Oct 1 2013, 04:20 PM
Post #3


Cap'n Krusty
**********

Group: Members
Posts: 10,794
Joined: 24-June 04
From: Santa Maria, CA
Member No.: 2,246
Region Association: Central California
In all the clutch jobs, engine overhauls, and jobs requiring removal of the T4 flywheel I've done over the last 40 years, I don't recall ever replacing the bolts. They're not stretch bolts (AKA "torque to yield"), they're just plain old bolts with a locking flange which gets a bite on the steel locking plate. Besides that, the book doesn't say to replace them.

The Cap'n
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
brant
post Oct 1 2013, 04:20 PM
Post #4


914 Wizard
**********

Group: Members
Posts: 12,012
Joined: 30-December 02
From: Colorado
Member No.: 47
Region Association: Rocky Mountains
which motor.... 4 or 6
and if 6 which displacement


the answer is different depending on which motor
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914mikee100
post Oct 2 2013, 01:32 PM
Post #5


Newbie
*

Group: Members
Posts: 42
Joined: 20-July 12
From: Utah
Member No.: 14,702
Region Association: None
It's a 993 3.6.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
0396
post Oct 2 2013, 04:50 PM
Post #6


Advanced Member
****

Group: Members
Posts: 2,046
Joined: 13-October 03
From: L.A. Calif
Member No.: 1,245
Region Association: Southern California
QUOTE(914mikee100 @ Oct 2 2013, 12:32 PM) *

It's a 993 3.6.

With that kind of $ involved, why take a chance on a used bolt. It's like taking a shower and putting on the same underwear.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mike Bellis
post Oct 2 2013, 06:49 PM
Post #7


Resident Electrician
*****

Group: Members
Posts: 8,347
Joined: 22-June 09
From: Midlothian TX
Member No.: 10,496
Region Association: None
www.boltdepot.com


(IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
reharvey
post Oct 2 2013, 08:19 PM
Post #8


Senior Member
***

Group: Members
Posts: 573
Joined: 16-July 08
From: N. E. Ohio
Member No.: 9,308
Region Association: North East States
QUOTE(Cap'n Krusty @ Oct 1 2013, 06:20 PM) *

In all the clutch jobs, engine overhauls, and jobs requiring removal of the T4 flywheel I've done over the last 40 years, I don't recall ever replacing the bolts. They're not stretch bolts (AKA "torque to yield"), they're just plain old bolts with a locking flange which gets a bite on the steel locking plate. Besides that, the book doesn't say to replace them.

The Cap'n



(IMG:style_emoticons/default/agree.gif) Has anyone had one fail? I never have on my 7 cars in normal use without any abuse.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Oct 2 2013, 09:48 PM
Post #9


914 Freak!
***************

Group: Retired Admin
Posts: 20,180
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
QUOTE
why take a chance on a used bolt.

why take a chance on a new bolt of unknown manufacture.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
0396
post Oct 2 2013, 10:26 PM
Post #10


Advanced Member
****

Group: Members
Posts: 2,046
Joined: 13-October 03
From: L.A. Calif
Member No.: 1,245
Region Association: Southern California
QUOTE(McMark @ Oct 2 2013, 08:48 PM) *

QUOTE
why take a chance on a used bolt.

why take a chance on a new bolt of unknown manufacture.
- buy OEM Porsche
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
cwpeden
post Oct 3 2013, 09:01 AM
Post #11


Great White North, huh?
***

Group: Members
Posts: 916
Joined: 20-August 06
From: Victoria BC
Member No.: 6,693
Region Association: Canada
I work in ship building and the engineers/inspectors have always have always stated rotating assemblies are single use fasteners. All others can be re+re.

Of course none of us will find ourselves floating in the middle of the ocean without propulsion, and i've been guilty of not following my own advice and some given here.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Cap'n Krusty
post Oct 3 2013, 09:36 AM
Post #12


Cap'n Krusty
**********

Group: Members
Posts: 10,794
Joined: 24-June 04
From: Santa Maria, CA
Member No.: 2,246
Region Association: Central California
QUOTE(914mikee100 @ Oct 2 2013, 12:32 PM) *

It's a 993 3.6.


Well, this is yet another case of asking a question WITHOUT divulging critical information. Had you told us, as a group, that you're talking about a non-stock application, you would have gotten a correct answer. ALL 911 flywheel bolts are ALWAYS replaced after each torquing to spec. And they're not cheap .....................

The Cap'n
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
smcfarland
post Oct 4 2013, 04:42 PM
Post #13


Newbie
*

Group: Members
Posts: 5
Joined: 29-September 13
From: CT, USA
Member No.: 16,452
Region Association: North East States
no
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Drums66
post Oct 5 2013, 11:22 AM
Post #14


914 Rudiments
*****

Group: Members
Posts: 5,321
Joined: 15-January 03
From: Coronado,Cali
Member No.: 151
Region Association: Southwest Region
.....Of course you can reuse them!....but, if you're
going with everything new(rebuilding engine)replace with OEM.(idea)
(IMG:style_emoticons/default/bye1.gif) (IMG:style_emoticons/default/flag.gif) (just my opinion)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ThePaintedMan
post Oct 5 2013, 11:45 AM
Post #15


Advanced Member
****

Group: Members
Posts: 3,887
Joined: 6-September 11
From: St. Petersburg, FL
Member No.: 13,527
Region Association: South East States
QUOTE(Cap'n Krusty @ Oct 3 2013, 11:36 AM) *

Well, this is yet another case of asking a question WITHOUT divulging critical information. Had you told us, as a group, that you're talking about a non-stock application, you would have gotten a correct answer. ALL 911 flywheel bolts are ALWAYS replaced after each torquing to spec. And they're not cheap .....................

The Cap'n


(IMG:style_emoticons/default/agree.gif) You guys have to be more specific in order to receive a specific answer.

Don't play around with torque to yield bolts. They're designed to stretch, and once they do, they're not to be used again. Especially don't play around on a 993 engine. That's a very expensive engine/tranny combo to cheap out on a few bolts for. If it was a 79 F-100 that you wanted to get a few more miles out of, I could somewhat understand. But it's not.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Switch to: Standard · Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 15th July 2025 - 03:29 AM
Invision Power Board v9.1.4 © 2025  IPS, Inc.
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 ...