In case you are not a fan of obscure BMW sports cars, we will tell you that the doors of a BMW Z1 (Zed One) are unlike any you may have seen. They are power-operated, and they drop down into the door sills. Repairs are daunting, but no worries. Edd China of Wheeler Dealers fixes the fussy door of this BMW with a large water jug, a bathroom scale, and a bit of baling wire.
Repairing any premium German automobile is always expensive and tricky. Fixing a rare vintage premium German car is a bit more of a challenge. The BMW Z1’s doors are operated by a pretty complex system of levers, rack gear, and toothed belt operated by two motors and a series of micro switches. After revealing the innards, Edd goes on-line and looks at how the door can be tuned up. He finds that a loose belt may be the trouble. 20kg is the proper tension and this car’s belt is loose. There is a hook on the belt tensioning arm on which to apply the specified force, but how?
Edd opts to find a plastic water jug, top it off to a weight of 20kg, weigh it on his bathroom scale and then suspend it on the tension arm hook. Total material costs? Zero. Genius. In a prior episode, Edd repaired an Audi TT transmission by making a special tool and replacing a hidden aluminum rivet with a 50 pence nut and bolt. The man is amazing. Watch the repair in the video below. It begins at about minute 28 if you prefer to skip to that section.