hello,
I looked at mine over the weekend. I'm not exactly sure which cylinder you are having problems with. From inspecting mine, all the holding bolts/pins look like they are steel. you might try vise-grip pliers before welding in the car. Fires, burning wiring, damaging paint, and risk to interior requires special care for protecting everything when welding. if you post a picture, I may be able to help you further. Good luck!