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In Reply to: broken rear upper shock mounts way have fix posted by Dennis Kalogeras on March 19, 2000 at 09:57:12:
I've never TIG welded on an e31, but I have done numerous other computer equipped cars, along with lots of race cars with electronics. we disconnect battery, and make sure the welder ground clamp is attached as close as possible to the actual weld area, preferably to the parent piece, and to an area cleaned down to bare metal. This may require extra effort and time. We also route welding cable well away from any electronics. Maybe there are other precautions we could take, but we have never had a problem with this procedure(knock on wood). Anyone who has been zapped with the TIG high frequency deal, even through gloves, can understand the need for a good ground!
Mark
: My 91 has a fatigued upper shock mount that has torn out the one of the two mounting studs and took a 1/2 dollar size chunk of metal with it. Repair process will require welding of broken section. The welding process will be tig. Anyone that has input on the dangers of high frequency welding on a highly computerized car please answer. Five ecu,s will be disconnected but left in the car. I have designed a steel plate to fit the exact dimensions where the nuts screw the studs to the chassis. Creating a sandwich type situation hopfully eliminating the condition for ever. If any one is intersted in this part contact me 773-267-9481. I can fax you a print but if you want them made it will cost around $40 because they are hand machined and painted in epoxy
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