The little screw makes it easier to align the holes in your rotor with the
holes in the hub with the holes in your wheels so that when you are ready to
insert a wheel bolt you don't curse your maker.

You can use a screwdriver to accomplish same.  Simply put a screwdriver
through one of the wheel bolt holes into the other holes, push the wheel
against the rotor, pry up on the screw driver with one hand while inserting
a bolt with the other into another hole.  I usually stick my foot under the
tire to help balance the whole thing.

I never had a problem with any chafing.

----- Original Message -----
From: mark fisher <fishmeok@worldnet.att.net>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Friday, June 09, 2000 9:23 AM
Subject: brake rotors, temp gauges, and oil pressure

> Howdy
> Just changed the rotors and pads on my '87 Synchro (worn down to the
> metal-I usually drive the OTHER vanagon and didn't notice how bad they
> were) and I have a question about the countersunk set screws on the rotor-
> I had to drill and tap both of them out and was told that thay don't
really
> serve a purpose and can be left out. Seems to me they keep the rotor from
> chafing back and forth on the lugs- how critical ARE they?
> And what do i need to know to install a temp and oil gauge? are the
> mechanical or electrical better for temp?
> Thanks
> Mark
> '87 Synchro
> '86 Vanagon (with a sunroof  and lots of rust)
> Two army jeeps, two bmw motorcycles, and a couple of border collies