My husband is trying to do a "minor" tune up on our 1990 740GL wagon. We can't remember changing spark plugs or wires since at least 1992. Anyhow, he can't figure out exactly what he needs to get the distributor cap off. There is very little room to work. We saw somewhere on the Brickboard where you need an 8 mm wrench, I guess he needs a little more info than that. If anyone has a good description of what tool he should use, we would appreciate it. The car has 223,000 plus a few, miles on it. I guess it's a little overdue a tuneup. Thanks.

I had to do this for a friend recently found best aproach was to mark the HT leads and disconnect them from the cap (gives more room to work), use an 8mm AF spanner to loosen the three screws then use an 8mm socket which you should be able to turn with your fingers to fully unscrew them - lots of turns needed.

Best Wishes

There are usually 3 8mm bolts holding the cap to the back of the head..a little body twisting and hand contortion with the 8mm box end wrench and the cap will come off.
buena suerte,
el Raidman

8mm wrench, as noted in the FAQ.

I haven't tried it yet but one of those 'gear-wrench' things might be good for this. (8mm)

Chuck

8mm box wrench.
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Jim McDonald