That is exactly the information I needed. Thanks! ----- Original Message ----- From: "marc vellat" <[EMAIL PROTECTED]> To: "Air-Cooled Volkswagen Discussion List" <[email protected]> Sent: Friday, January 25, 2008 3:02 AM Subject: Re: [vintagvw] 12v flywheel on 6v crank question
> First let's correct the nomenclature. The method of > sealing the flywheel to the crank was changed (from > gasket to O-ring) in mid`66, predating the switch to > 12V. So it's more accurate to refer to the components > as "non-O-ring" and "O-ring" rather than "6V" and > 12V". > > The non-O-ring crank (as would be original equipment > in your `65) has a short step on the nose; O-ring > cranks have a longer one to provide a place for the > O-ring inside the flywheel to reside. If you attempt > to fit an O-ring 'wheel to a non-O-ring crank, it'll > bottom out against this step long before it seats > properly against the end of the crank. > Simplest solution for your situation is to open up the > ID of the O-ring flywheel's outer lip. It needs to be >>55mm (2.165") to fit over a standard-size crank. This > operation would best be performed on a lathe by a > machinist, but it IS possible to do yourself with a > die grinder or Dremel-type tool. Cut a disk out of a > tin can lid to lay against the dowel-pin surface so > you can't nick it if your hand should happen to slip > (this is CRITICAL - damage that surface and the gasket > won't have a chance of sealing properly). You also > don't want to nick the thrust surface, but if you > should happen to that's not such a big deal, just sand > off any raised burr. > Note that the early end-play shims have a larger ID > than the late ones intended for the O-ring crank, too. > Late shims won't fit over the step on an early crank > so this is idiot-proof, I mention it mostly for the > benefit of folks setting the endplay on O-ring cranks > - they mustn't use the large-ID early shim (even > though it will fit) because it will hula-hoop around > and slice right into the crankshaft. > You may find that you can't get the endplay set to the > desired .004", even using three of the thickest shims, > since the gasket adds ~.008" (paper) or ~.012" (metal) > to the endplay and the O-ring crank was dimensioned so > as to not use a gasket. If this is the case, don't > fret over it, just use four shims - I promise it will > do no harm. > Anytime you're changing a flywheel/setting endplay on > ANY ACVW, always make sure that there is NO relative > motion between the thrust bearing and the case > contributing to your reading. If you have this problem > and add shim thickness to reduce the measured total > endplay, the engine is certain to seize in short > order. > Have an assistant clunk the crank back & forth from > the pulley end while you closely observe the thrust > bearing for any motion. Placing your fingertips so > they touch both the case and the bearing flange may > work better for you than a purely visual inspection. > > You're probably aware that you'll need a special > thickwalled adapter bushing to fit the 12V starter > into a 6V trans case. > http://www2.cip1.com/ProductDetails.asp?ProductCode=ACC%2DC10%2D5765 > > --- Dan <[EMAIL PROTECTED]> wrote: > >> Howdy all. It has been about 7 or 8 or 10 years but >> I'm back on the list. Glad to hear it is still >> around. >> >> I'm in need of some help. I'm converting my '65 bus >> from 6v to 12v. The 6v starter is shot and the >> trans is already clearanced for a 12v flywheel. I >> have both a 6v and 12v 200mm flywheels and a working >> 12v starter. My choices are spending $$$ for a new >> 6v starter and running the 6v flywheel or using the >> working 12v starter I already have and swapping to >> the 12v flywheel. There is a step in the mating >> area of the 6v flywheel that the 12v flywheel does >> not have. Is there a problem running a 12v flywheel >> on a 6v crank? >> >> Thanks in advance, >> Dan Kinsey > >> > > > > > ____________________________________________________________________________________ > Be a better friend, newshound, and > know-it-all with Yahoo! Mobile. Try it now. > http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ > > _______________________________________________ > vintagvw site list > [email protected] > http://lists.sjsu.edu/mailman/listinfo/vintagvw > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.516 / Virus Database: 269.19.11/1242 - Release Date: > 1/24/2008 8:32 PM > > _______________________________________________ vintagvw site list [email protected] http://lists.sjsu.edu/mailman/listinfo/vintagvw
