The kit comes with two rectangular plates for you to plug up the access holes you cut into the top.
Lastly, spray paint everything to keep welds from rusting.įor badly cracked floorboards, you will have to go thru the cabin of the car, cut into the top side of the floorboard and then weld up more cracking. Then grind down any rosette welds that may keep the subframe from lying flat against the chassis. Also fully weld up the rosette holes in the plates to strengthen the plate. Next, fully weld all the way around the plate so no moisture will get in. You may need to hammer the plates to contour to the body first. Next, tack weld the BimmerWorld plates on to the undercarriage. Once the cracks and holes are all welded up you must grind down the welds in order for the reinforcement plates to lay flat against the car. We went ahead and drilled those holes out before welding. We spotted some behind the driver’s rear wheel that had popped loose. If you look closely you might even find that some of your spot welds have popped loose. The rear floorboard is made up of several sheets of metal all spot welded together. This is a good time to inspect the factory spot welds on the entire rear floor. Think of it like an anchor for the welds. These stop-holes will keep the crack from continuing on in the event that the welds don’t hold.
Once the paint and undercoating is removed, you can see the damage clearly.īefore welding up the cracks, Precision German Performance recommends drilling tiny holes at the ends of every crack. Then prep the metal for welding by sanding down the area completely down to the bare metal. First, clean off all the dirt around the subframe mounting points.