[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [New Search]
On 04/19/97 21:31:05 you wrote: > >>From: David Raistrick <xi8940@freenet.tlh.fl.us> > >>Next question for 1500/1600 rebuild concerns the distributor >>drive shaft and, in particular, end play for the shaft. Tom >>Wilson (_How_to_Rebuild...) advocates installing the shim(s), >>shaft, and distributor (without the spring) and then measuring >>end play between the case and the shoulder of the shaft. He >>cites a range of .020-.050" with an emphasis on the *minimum >>allowable* being .020. > >I checked all the manuals I have and cannot find anything outside of the >already questionable (in my opinion) Wilson book that confirms this. On the >other hand it does seem rather reasonable, and that may be all that Wilson >intended. > >>Enter my problem. Taking the Wilson approach, I installed shim, >>shaft and distributor to check end play before mating the case >>halves. As I see it, I have end play closer to .25" than .020" >>and I'm befuddled. I've owned this bus since 1979 (a very long >>body restoration project). The PO had the engine rebuilt in the >>mid-70s by the local VW dealer. It has what appears to be the >>231B shaft but only one shim and I could put 10 shims in there >>before approaching Wilson's range. > >I bought a basket case type 3 engine in about 1970. This case had been >rebuilt once before and it had a thick spacer under the drive gear. At that >time some of my VW friends thought that this spacer might have been evidence >of a factory rebuild (supposedly done in Canada for VWoA) where the case had >been remachined there for some reason and a larger spacer added. I have >never been able to confirm this speculation. > >>-Jim Bryant > >I note that Jim Bryant is one of our more knowledgable subscribers, too. > >> It should be tight but not too tight and it should be >> loose but not too loose and it really matters and it >> may not matter too much. > >Seems fair. > >>Two possible pieces of the puzzle I don't have. One, some >>distributor drive shafts have a steel spacer about 1/4" thick >>which goes on the end with the shim(s). Two, some cases had a >>similar spacer pressed into the case where the drive shaft seats, >>ostensibly to provide a better shoulder to cry on. In the latter >>scenario, I would assume that the hole in the case where the >>drive shaft seats would be of larger diameter to accommodate the >>pressed-in spacer. Not so in my case (pun intended). By process >>of elimination, I pursue the former. > >To attempt to shed a bit more light on this I went back to the microfilm. I >know I have done this before, but maybe this time I was paying a bit more >attention. I found something interesting. > >113 105 231 B PINION, DISTRIBUTOR DRIVE > (USE WITH 111 105 235 A > ONLY) >111 105 233 COIL SPRING > FOR DISTRIBUTOR DRIVE PINION >113 105 235 WASHER 6.3 MM > FOR DISTRIBUTOR DRIVE PINION > M --K 0 033 505 > M --M 0 000 249 > M --T 0 186 545 > M --P 0 000 649 >111 105 235 A WASHER, 0.6 MM > FOR DISTRIBUTOR DRIVE PINION > M K 0 033 506-- > M M 0 000 250-- > M T 0 186 546-- > M P 0 000 650-- > M U 0 000 001-- > M U 5 000 001-- > M --X 0 004 000 > >So this says that a thick (1/4"!) spacer was used as standard on all engines >up to mid 1966. The note under the drive pinion description implies that >this "B" part number superceded an earlier gear that came with the thick >washers. The late gear can apparently be used in an early engine if the >late washers are used also. > >Can some of you with old engines confirm any of this? > >Unfortunately, if I understand Jim Bryant's message correctly this does not >answer his question because his engine was a type 4 bus and a decade after >the changeover. > >Jim > --------------------------------------------------------------------- > Melissa Kepner Jim Adney > jadney@vwtype3.org jadney@vwtype3.org > Laura Kepner-Adney > Madison, Wisconsin > --------------------------------------------------------------------- > > > I have seen scrap cases in junkyards both with and without the thick spacer/shim/thrust-bearing. I read somewhere, wish I could find it, that it was a correction for a machining oopsie at the factory. Guess the idea was to machine it down further and put in a standard shim or spacer. The cases I saw were from all vintages and types, so I don't think anyone's been singled out. I could see where this could get knocked loose and lost and if you didn't know about it, you could really get puzzled trying to get endplay established. Not sure how the thing was fastened in, staking maybe? Thanks for the PNs.