Most of the old trucks had lock washers on the heads of the bolts holding the bellhousing to the flywheel housing. On the old double breasted Yamaha's if they didn't have lock washers they would work loose and break the bolts off. Then you had a couple options 1 change flywheel housing or 2 drill out the old bolts and tap for new bolts if you could otherwise you had to drill out old bolts and helicoil the old holes for new bolts. Never had problems with trucks with Cummins or Cats in them doing that just those detriots. Usually the lock washers were a flat form of a washer. Sometimes split ones were used as a replacement by somebody that had lost one or it broke. I think for a lot of jobs torquing bolts is over rated. Till I was in high school I didn't know they made torque wrenches. Never had one nor used one. Did many engines without one with no failures due to proper torque on bolts.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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