Notices
993 Forum 1995-1998

993 Door strap metal fatigue

Thread Tools
 
Search this Thread
 
Old 01-24-2006, 09:51 PM
  #1  
StevoUK
Rennlist Member
Thread Starter
 
StevoUK's Avatar
 
Join Date: Oct 2003
Location: Staffordshire, UK
Posts: 1,218
Received 2 Likes on 2 Posts
Default 993 Door strap metal fatigue

Ok its time to own up, I have been driving around with drivers door strap fatigue for 9000 miles. My motor has 40k miles on the clock. So that means for the period since 31k miles my door strap (drivers side naturally) has been defective. As in a peice of poo defective. If Vauxhall and Peugeot can get a simple door strap right why can't Porsche?
Is this a problem lurking to catch out 997 owners later? Are there queues of 996 and 997 and Boxter and Cayenne owners outside Porsches new shiny showrooms with door straps disconnected?
I think not.
Did Porsche issue a recall for this obvious design fault (a Friday afternoon job for a work experience or community service kid perhaps?).

I think not.

Photographs of all cars owned by my neighbours show that all manufacturers of hatchbacks know how to design a door strap that lasts 250000 miles. Mercedes taxis have straps that last for several trips to the moon. And back.

But not Porsche.

How much have you been charged for fixing this clear Porsche design problem?
Old 01-24-2006, 10:09 PM
  #2  
Marc Shaw
Super Duper Moderator
Lifetime Rennlist
Member
 
Marc Shaw's Avatar
 
Join Date: Nov 2004
Location: YQU
Posts: 7,774
Likes: 0
Received 15 Likes on 13 Posts
Default

John,

You could always replace it yourself for the cost of the part (US$31).

Marc
Old 01-24-2006, 10:46 PM
  #3  
Tom Pepper
Addict
Rennlist Member

 
Tom Pepper's Avatar
 
Join Date: Nov 2001
Location: Columbus, Ohio
Posts: 238
Likes: 0
Received 0 Likes on 0 Posts
Thumbs up

Marc.

I missed your excellent DYI on the door strap first time around. Thanks for reposting. That is GOOD work.
Old 01-24-2006, 10:47 PM
  #4  
pcar964
Addict
Lifetime Rennlist
Member
 
pcar964's Avatar
 
Join Date: Oct 2004
Posts: 5,225
Likes: 0
Received 1 Like on 1 Post
Default

I dont think it's a big deal to repair this.
Old 01-25-2006, 12:18 AM
  #5  
Jim W
Instructor
 
Jim W's Avatar
 
Join Date: Oct 2005
Location: SE Wisconsin
Posts: 242
Likes: 0
Received 0 Likes on 0 Posts
Default

My door makes a 'click' and drops perceptibly just as its opened. Are those the symptoms of check strap failure? I have no cracking (yet) in the area.
Great how-to guide for repair.
Old 01-25-2006, 09:26 AM
  #6  
Paul902
Three Wheelin'
 
Paul902's Avatar
 
Join Date: Dec 2004
Location: Ottawa, Ontario
Posts: 1,795
Likes: 0
Received 2 Likes on 2 Posts
Default

I missed the DIY and had my door check strap fixed last year. The dealership here had the work done for me. I believe it involved a spot weld somewhere. It was pretty inexpensive.
Old 01-25-2006, 09:49 AM
  #7  
SJB993
Pro
 
SJB993's Avatar
 
Join Date: Mar 2004
Location: Reading UK
Posts: 507
Likes: 0
Received 0 Likes on 0 Posts
Default

Jim W,

The click possibly is the check strap.

As for the door dropping, I wouldn't think this has anything to do with the check strap. Sounds like a hinge/striker plate issue.
Old 01-25-2006, 10:22 AM
  #8  
beers4all
Rennlist Member
 
beers4all's Avatar
 
Join Date: Sep 2005
Location: Niagara, Ontario CDA
Posts: 850
Likes: 0
Received 1 Like on 1 Post
Default

It's ironic that in the 1997 MY brochure, there is a section dedicated to the design of the door and the fact that the design has remained essentially unchanged over generations of 911's. To paraphrase: "it's a good door, why change it?"
Old 01-25-2006, 01:49 PM
  #9  
Robin 993DX
Rennlist
Lifetime Member
 
Robin 993DX's Avatar
 
Join Date: May 2001
Location: Chino hills, CA
Posts: 3,651
Likes: 0
Received 6 Likes on 5 Posts
Default

The 993 door check strap failure is related to the hinge on the frame part of the car, not a problem on the door side.

One of the main cause I believe is (result of cost reduction) that on the 993 cars there is one less weld spot on the exposed side of the hinge to secure the hinge in place, on the 964 cars (which do not have this problem) there are two weld spots on the check strap hinge. So as the door is opened and closed the stress and pressure causes the hinge to break off from the base on the inside of the A-pillar frame (can't see from outside)..... As far as I know that you can only really get to it from the inside cabine fo the car through the driver's side footwell area....

My car developed the same clicking problem at 60k miles, so I performed the door check strap DIY (to lessen the stress caused by the door stop bumps) Door strap DIY and welded two spots (Top and bottom) on the outside to secure the check strap hinge and haven't had the problem since.

The check strap hinge is the exact same item used on the 964, because the extra weld spot the 964 prevented this problem from happening to the 964 owners.
Old 01-25-2006, 06:39 PM
  #10  
Paul902
Three Wheelin'
 
Paul902's Avatar
 
Join Date: Dec 2004
Location: Ottawa, Ontario
Posts: 1,795
Likes: 0
Received 2 Likes on 2 Posts
Default

Thanks for the details, Robin. It highlights why I needed a spot weld, and the fact that I should read the DIY so I can prevent the problem from occuring on the passanger side.

Old 01-27-2006, 10:35 AM
  #11  
User 121721
Racer
 
User 121721's Avatar
 
Join Date: Mar 2002
Posts: 252
Likes: 0
Received 0 Likes on 0 Posts
Default

"welded two spots (Top and bottom) on the outside to secure the check strap hinge and haven't had the problem since"

Robin,
Can you elaborate on excactly where? I have the clicking for the last three years and don't want to pay the $600 my body shop is asking for.

TIA
Old 01-27-2006, 12:36 PM
  #12  
Robin 993DX
Rennlist
Lifetime Member
 
Robin 993DX's Avatar
 
Join Date: May 2001
Location: Chino hills, CA
Posts: 3,651
Likes: 0
Received 6 Likes on 5 Posts
Default

Mark,

I will need to remember to take a picture of the weld spots and post it.
Old 01-27-2006, 11:32 PM
  #13  
Blaine S
Rennlist Member
 
Blaine S's Avatar
 
Join Date: Jan 2005
Location: MA
Posts: 585
Received 17 Likes on 8 Posts
Default

I'd like to see some pics of welds that people have had done. The shop I was just talking to yesterday said they'd use a MIG welder and make a fine narrow weld.
Old 01-29-2006, 12:55 PM
  #14  
Robin 993DX
Rennlist
Lifetime Member
 
Robin 993DX's Avatar
 
Join Date: May 2001
Location: Chino hills, CA
Posts: 3,651
Likes: 0
Received 6 Likes on 5 Posts
Default

Here is the picture of the weld. I guess I only made one weld under the hinge so it is not very noticeable. I had to grind off the paint in that area first before the weld, and used some touch up paint to paint over the welded area afterwards.

Old 01-30-2006, 10:03 AM
  #15  
User 121721
Racer
 
User 121721's Avatar
 
Join Date: Mar 2002
Posts: 252
Likes: 0
Received 0 Likes on 0 Posts
Default

Robin,
I take it you see no need to pay a body shop $600 to go into the area under the A pillar and re-soder the welds -- I should ask them to just weld the strap as you did?

It makes you wonder why porsche didn't weld the strap to the door frame (as you did) when they were building the car -- seems like a simpler, more durable design.

Thanks for the photo!

Mark


Quick Reply: 993 Door strap metal fatigue



All times are GMT -3. The time now is 01:33 AM.