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 )

2 Pages V  1 2 >  
 Reply to this topicStart new topic
> Clutch Tube repair, Pictures needed
Trekkor
post Nov 16 2006, 04:28 PM
Post #1


I do things...
*****

Group: Members
Posts: 7,809
Joined: 2-December 03
From: Napa, Ca
Member No.: 1,413
Region Association: Northern California
I want to open up the center tunnel to inspect and repair the broken clutch cable tube. It has broken away and that has contributed to the clutch cable fork that attaches to the pedal bending and breaking during my last track day.

When the tube breaks, the cable pulls from an angle and creates uneven stress on the fork.
Also, a broken tube make it difficult to properly adjust the clutch.

I would like to see a picture showing an access hole above the tube location.

thanks


KT
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Rand
post Nov 16 2006, 04:38 PM
Post #2


Cross Member
*****

Group: Members
Posts: 7,409
Joined: 8-February 05
From: OR
Member No.: 3,573
Region Association: None
Try a search in the classics for "clutch tube." There might be a thread in there with some good pics.

I don't know if it has the pic you're looking for but check this:
clutch tube repair
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mueller
post Nov 16 2006, 05:27 PM
Post #3


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

Group: Members
Posts: 17,150
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
cutting the center tunnel for access is a hack job (IMG:style_emoticons/default/smile.gif)

seriously, you only need to drill out the spot welds on the side of the tunnel and re-weld....

I think Jeff Bowlsby posted pictures of the repair I did on his Grasshopper car.... (IMG:style_emoticons/default/welder.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
toon1
post Nov 16 2006, 05:32 PM
Post #4


Senior Member
***

Group: Members
Posts: 1,849
Joined: 29-October 05
From: tracy,ca
Member No.: 5,022
QUOTE(Mueller @ Nov 16 2006, 03:27 PM) *

cutting the center tunnel for access is a hack job (IMG:style_emoticons/default/smile.gif)

seriously, you only need to drill out the spot welds on the side of the tunnel and re-weld....

I think Jeff Bowlsby posted pictures of the repair I did on his Grasshopper car.... (IMG:style_emoticons/default/welder.gif)

(IMG:style_emoticons/default/agree.gif) that's what I did. pull the clutch and throttle cable before you weld, you'll be sorry if lyou don't.

Ask me how I know!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JeffBowlsby
post Nov 16 2006, 09:50 PM
Post #5


914 Wiring Harnesses
*****

Group: Members
Posts: 8,706
Joined: 7-January 03
From: San Ramon CA
Member No.: 104
Region Association: None
Trek:

Go here to see the carnage of the hard/wrong way and then the easy/right way at the end of the thread.

Clutch tube repair

(IMG:style_emoticons/default/biggrin.gif)
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Krieger
post Nov 16 2006, 10:08 PM
Post #6


Advanced Member
****

Group: Members
Posts: 4,759
Joined: 24-May 04
From: Santa Rosa CA
Member No.: 2,104
Region Association: None
Nice plate job for the firewall. I had to make both those repairs as well.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SGB
post Nov 16 2006, 10:37 PM
Post #7


just visiting
****

Group: Members
Posts: 4,086
Joined: 8-March 03
From: Huntsville, AL
Member No.: 404
Region Association: South East States
here is more "insight" courtesy of DD
914_center_tunnel
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Trekkor
post Nov 16 2006, 10:41 PM
Post #8


I do things...
*****

Group: Members
Posts: 7,809
Joined: 2-December 03
From: Napa, Ca
Member No.: 1,413
Region Association: Northern California
Thanks for the link.

I want to fix this tomorrow.


KT
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Trekkor
post Nov 16 2006, 10:53 PM
Post #9


I do things...
*****

Group: Members
Posts: 7,809
Joined: 2-December 03
From: Napa, Ca
Member No.: 1,413
Region Association: Northern California
If I do cut a hole, it will be concealed by the center console.

The hole doesn't bother me.

What kills me is, because I don't street drive the car so much anymore, it only breaks down at the track/autocross. (IMG:style_emoticons/default/headbang.gif)


KT
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Trekkor
post Nov 16 2006, 11:11 PM
Post #10


I do things...
*****

Group: Members
Posts: 7,809
Joined: 2-December 03
From: Napa, Ca
Member No.: 1,413
Region Association: Northern California
My clutch tube is SO loose in there, that when I depressed the clutch pedal the shifter would move. (IMG:style_emoticons/default/ohmy.gif)

I inspected and the top of the clutch tube has been worn to bare metal right under the shifter. It's been loose for quite some time.

At least since the Laguna weekend two months ago.


KT
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JeffBowlsby
post Nov 16 2006, 11:29 PM
Post #11


914 Wiring Harnesses
*****

Group: Members
Posts: 8,706
Joined: 7-January 03
From: San Ramon CA
Member No.: 104
Region Association: None
Once you see how easy it is to fix, its way more trouble to cut the hole, and its unecessary. Pull the cable and shifter, locate and drill the holes on the side tunnel wall, weld, reinstall shifter and cable. Done. Very easy.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Trekkor
post Nov 16 2006, 11:45 PM
Post #12


I do things...
*****

Group: Members
Posts: 7,809
Joined: 2-December 03
From: Napa, Ca
Member No.: 1,413
Region Association: Northern California
How are you keeping the tube firm against the inner surface of the tunnel before welding?

Mine is all over the place in there. (IMG:style_emoticons/default/confused24.gif)


KT
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JeffBowlsby
post Nov 17 2006, 12:04 AM
Post #13


914 Wiring Harnesses
*****

Group: Members
Posts: 8,706
Joined: 7-January 03
From: San Ramon CA
Member No.: 104
Region Association: None
C-Clamp it to the side of the tunnel through the shifter access hole.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Trekkor
post Nov 17 2006, 12:10 AM
Post #14


I do things...
*****

Group: Members
Posts: 7,809
Joined: 2-December 03
From: Napa, Ca
Member No.: 1,413
Region Association: Northern California
I'll try that first. Thanks. (IMG:style_emoticons/default/welder.gif)


KT
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
So.Cal.914
post Nov 17 2006, 12:15 AM
Post #15


"...And it has a front trunk too."
*****

Group: Members
Posts: 6,588
Joined: 15-February 04
From: Low Desert, CA./ Hills of N.J.
Member No.: 1,658
Region Association: None
I heard a good idea for preventive measures, at the fire wall/clutch tube weld

a large fender washer to the firewall over the clutch tube and then to the tube

itself. This reinforces that connection point and spreads the stress out over a

larger area. Just FYI.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Trekkor
post Nov 17 2006, 12:29 AM
Post #16


I do things...
*****

Group: Members
Posts: 7,809
Joined: 2-December 03
From: Napa, Ca
Member No.: 1,413
Region Association: Northern California
Yes, I'll be doing something like that, too.


KT
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
John
post Nov 17 2006, 12:41 AM
Post #17


member? what's a member?
****

Group: Members
Posts: 3,393
Joined: 30-January 04
From: Evansville, IN (SIRPCA)
Member No.: 1,615
Region Association: None
I believe at the rear firewall, I used a 1/2" washer with a flat spot ground on it (to fit against the floor seam).

I did the drilled spotweld trick. to secure the front of the tube as well. Real easy fix.

The one location I am sort of concerned with is the weld location between the seats. I couldn't figure out a way to get to that one to reweld it.

The tubes were once welded in 3 spots:

1. At the front of the tube
2. In the middle of the tube
3. At the rear of the tube (firewall).
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
KenH
post Nov 17 2006, 01:28 AM
Post #18


Senior Member
***

Group: Members
Posts: 680
Joined: 16-January 03
From: Gilroy, CA
Member No.: 156
In held one in place with a metal cable clamp around the tube and then bolted inside the tunnel with just a bolt & nut coming through the side of the tunnel - no welding.

Ken
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
McMark
post Nov 17 2006, 03:42 AM
Post #19


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

Group: Retired Admin
Posts: 20,179
Joined: 13-March 03
From: Grand Rapids, MI
Member No.: 419
Region Association: None
QUOTE(JOHNMAN @ Nov 16 2006, 10:41 PM) *

The tubes were once welded in 3 spots:

1. At the front of the tube
2. In the middle of the tube
3. At the rear of the tube (firewall).


This is true, EXCEPT that they were never welded. No tube is welded to the car. The clutch tube, the engine lid release tube are all brazed. Welding has the potential to protrude into the tube as it melts. Any protrusion into the tube will wear cables FAST! Welding clutch tubes makes me nervous, but it's really the best solution as long as you're careful.

The brazing is also one of the reasons that a fender washer is necessary at the firewall. You can weld over brazing, so in order to repair that section you either have to redo the braze, remove all the brazing material then weld, or use a fender washer that extends beyond the brazing.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
maf914
post Nov 17 2006, 07:30 AM
Post #20


Not a Guru!
****

Group: Members
Posts: 3,049
Joined: 30-April 03
From: Central Florida
Member No.: 632
Region Association: None
Mark, Good points about brazing versus welding. (IMG:style_emoticons/default/idea.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

2 Pages V  1 2 >
Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

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

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

- Lo-Fi Version Time is now: 31st October 2024 - 07:24 PM
Invision Power Board v9.1.4 © 2024  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 ...