Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 04-08-2008, 10:41 AM   #1
Registered User
 
Join Date: Apr 2008
Location: San Jose, CA
Posts: 2
Help! Mercedes Technician needs Porsche Guidance!

Hello all,

I am a Mercedes technician who is attempting to repair my sister's '97 Boxster. The convertible top motor on the left side is rotating and raising the left side of the top, however, the right side motor is not moving at all, causing the top to twist. A few questions......

Do these motors typically fail? Is there a seperate relay for each side motor?
Also, to replace the motor if that is the failure, do any of the interior panels have to come off to remove and replace it?

I appreciate any help! And if any of you may have Mercedes questions, please feel free to ask!

Thank you,

Tony

mbzex.com is offline   Reply With Quote
Old 04-08-2008, 10:48 AM   #2
EE3racing
Guest
 
Posts: n/a
Not sure on the relays but there is a small wire cable that operated each side, the older units had plastic ends that break off, it could be that both motors are fine and you have a broken actuator cable. If that is the case, there is a procedure you will have to follow to reset the timing cycle correctly. Try the search feature, I think I have seen instructions and pics in here before, good luck.



Quote:
Originally Posted by mbzex.com
Hello all,

I am a Mercedes technician who is attempting to repair my sister's '97 Boxster. The convertible top motor on the left side is rotating and raising the left side of the top, however, the right side motor is not moving at all, causing the top to twist. A few questions......

Do these motors typically fail? Is there a seperate relay for each side motor?
Also, to replace the motor if that is the failure, do any of the interior panels have to come off to remove and replace it?

I appreciate any help! And if any of you may have Mercedes questions, please feel free to ask!

Thank you,

Tony
  Reply With Quote
Old 04-08-2008, 12:48 PM   #3
Registered User
 
Join Date: Dec 2005
Location: South Riding, VA
Posts: 322
This link might help...
http://www.renntech.org/forums/index.php?showtopic=68
derb is offline   Reply With Quote
Old 04-08-2008, 09:33 PM   #4
Registered User
 
Lil bastard's Avatar
 
Join Date: Feb 2008
Location: Du Monde
Posts: 2,199
If one side raises, it's not the motor.

A single motor drives 2 transmissions (Lft, Rht) via a dedicated drive cable to each. The Transmission in turn raises/lowers both the Top Lid links and 2 push rods @.

The likely culprit is the drive cable. Another likely suspect might be the transmission itself.

Access the area and swap drive cables. Hook to a portable drill and see if the transmission now drives the assembly. If so, it's the drive cable. If not, it's the transmission.

Each has been known to fail. The square-end Drive Cable ends round-off with time and can no longer be turned by the motor. And the Transmission's internal gears can strip.

Whichever part it is, once replaced, the whole top assembly (both sides) will need to be simultaneously synchronized.

Care should be taken whenever operating this assembly until fully synchronized because damage to the Top Lid (Convertible Cover, Tonneau, whatever you want to call it) can easily result.

There are plastic end links on the Top Bow push rods (not the Drive Cables as erroneously mentioned), and these do break. But, if it were the Push Rods, the Top Lid would still function, though likely be damaged.

Aftermarket push rods are available with metal end links. But, the OEM end links are designed in plastic specifically to break first rather than bend or tweak the frame members. Personally, I would not switch to the aftermarket metal ones.

The OEM push rods can break simply from fatigue causing great frustration and hence the appeal of the ones with metal end links.

But, if using the metal ones, you're going to damage the Top Frame eventually, and this is a more complex and expensive repair than simply replacing the push rods.
__________________
1990 Porsche 964 Carrera 4 Cabriolet
1976 BMW 2002
1990 BMW 325is
1999 Porsche Boxster
(gone, but not forgotten)
http://i933.photobucket.com/albums/a...smiley-003.gif

Never drive faster than your Guardian Angel can fly!
Lil bastard is offline   Reply With Quote
Old 04-09-2008, 12:06 AM   #5
Registered User
 
Join Date: Apr 2008
Location: San Jose, CA
Posts: 2
Thank you!

Thank you all for your help! I appreciate all of the information. Thank you very much!!

Tony
mbzex.com is offline   Reply With Quote
Old 04-09-2008, 02:45 AM   #6
Rennzenn
 
j.fro's Avatar
 
Join Date: Feb 2005
Location: Virginia
Posts: 1,356
Garage
I've done this repair on a 98. The problem is the housings for the cables (Porsche has issued a Tech Bulletin and cars from 00 on have an updated cable housing and transmission). Unfortunately, the cables do not easily disassemble from the transmissions. The trouble with the early housings is that they are unreinforced plastic, and after time, tend to stretch. This pulls the inner cable out of the motor. The DIY fix is to shorten the housings by 1/4 -1/2 of an inch.

j.fro is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 11:29 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page