Wednesday, July 18, 2012

Crankshaft Assembled

With all the parts cleaned, inspected, and repaired I had hoped to begin assembly of the engine while the grand kids were here.  Unfortunately it was 100 degrees in the attic.  It's still hot but in the 80's so I can work until I'm wringing wet.

The first task was to assemble the crank and connecting rods.  With new bearings and hardware it's pretty straight forward but it takes a little time.  Everything gets well oiled so nothing moves on dry metal when the engine starts.  The rods have to be oriented so when the assembly is installed the numbers on the rods are on top.  Each bolt gets torqued to the minimum limit and if the cotter pin won't go in one of the 2 hole then the torque is increased until one hole works.  You can't go past the maximum torque or you have to try another nut.  I actually had 2 sets of nuts just in case but all stayed below the max.  When you are torquing a fastener you can not just add more torque.  You need to first loosen it a little and start over so the torque is reached while moving in a slow stead motion.  I prefer a breakaway torque wrench so there is a little trial and error to finally get the pins to all fit.  By the last one I was pretty good at guessing how much to increase the torque to line up the hole.

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