Date: Fri, 19 Nov 2004 19:43:40 GMT From: Dexter J <lamealameadingdongnospamlamelame.org> Subject: Re: C900 front rotor screw size?
Salutations: On Fri, 19 Nov 2004 13:53:13 -0500, Fred W <Fred.Willsnospammyrealbox.com> wrote: > Dave Hinz wrote: >> A friend of mine just bought an '86 900, and it needs front rotors. >> Those >> are on order, but I remember there's a torx-head screw holding the rotor >> to the hub. Does anyone know what size torx bit he needs for that? >> >> Dave Hinz > > Dave, > > Does it really matter? I mean, what your friend should probably be > sizing is the drill bit he will need to drill off the head of the torx > screw. It seems that every one I have come across, the screw material > is so soft that the torx head strip out before the screw breaks loose, > even after liberal application of PB Blaster. ...and NO! Do not heat > that sucker with a torch. > > -Fred W Hey brother Fred. While I forget the size too, the trick to that particular bolt is a first aid kit, patience and an old fashioned manual impact screw driver with a fresh torx head. My wrench at the time had spent some real time with English stuff here in salty Nova Scotia and what he showed me was that you first soak old SAAB bolts at all points with thinned (3/1) release oil - wire/bottle brush them off/out really carefully - then give it one (and only one) quick, solid, whack with the impact driver counter clockwise (loosen). You know you have that hit right if a little wisp of rust comes up because it will not appear to move at all. His trick was to then douse a gauze pad in regular release oil, wire it tightly over the bolt head and leave overnight in a warm place. The next morning, bottle brush out the torx head - oil and give it another single whack with the impact screw driver clockwise (tightening) - then reverse (loosen) using the same driver. He tried to make sure that the torx bit was always in the same slots for the hits and marked both at the outset. To no one's greater surprise than our own - it worked almost every time. Clean the hole with a tap, remount with *lots* of anti-seize and check every so often (twice a year when we swapped tires) for loosening. If the bolt hole was open to the elements on the other side, he would add a second gauze pad there before removing and put a little dab of hi-temp gasket sealer in the back of the hole after remounting the rotor. He was of the unofficial opinion that the factory may have been worried about loosening and had allowed for a little corrosion in the threads just to make sure it never fell off on their watch. You know - I miss Mike still. We used to get together Friday's and mess around. -- Dexter J's fab NG900 is for sale: http://www.dexterdyne.org/310.HTM