Join Date: Feb 2017
Location: St. Louis, Missouri
BT, generally a DOWEL pin is there to locate an assembly more precisely than just the mounting bolts alone can.
Motorcycle ignition, clutch, and timing chain covers are located using dowel pins, same as cylinder heads and drivechain counter shaft sprocket covers.
Many times Ive taken longer-than standard bolts, cut the heads off, slotted the bolts so as to be able to use a flat-blade screwdriver for removal, and used them as locating pins to avoid a conflict with the actual dowel pin in the case to which youre installing the item. Ive also used the shank end of a drill bit for the same purpose. Many times if an item us under hydraulic or spring pressure it's easy to just count on the mounting bolts to to draw the item into place. Then the bore in the item is out of alignment with the case-mounted dowel pin and bad things happen real quick.
Last edited by MAZ4ME; 03-01-2019 at 10:51 PM.