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Reply To: Binding Crankshaft

#954625
Steve Hemingway
Steve Hemingway
Participant

JOURNAL POS. X POS.W POS.Z POS. Y STANDARD MIN MAX
0 deg 90 deg 180 deg 270 deg
#1 0.002 0.0015 0.0025 0.0015 .0014/.0018 0.004
#2 0.003 0.003 0.002 0.002 .0014/.0018 0.004
#3 0.0015 0.002 0.002 0.002 .0014/.0018 0.004
#4 0.002 0.003 0.003 0.0015 .0014/.0018 0.004

THRUST <.002 .0024/.0065 0.012
Here’s what I determined after Plasti-gauging the crank in 4 90 deg. increments, torquing all caps in 3 stages (cleaned lightly oiled bolts), in 2,3,1,4 bearing order. I have found that thrust is .003 at bottom of bearing but won’t pass .003 feeler gauge at top of bearing .003 is my thinnest gauge. I removed #3 bearing but crank still turns hard. Obviously, I need more thrust clearance, but is that a matter of more machining off the recess of sanding the thrust collar itself? Also, if I must go back to the crankshaft shop, should I plasti-gauge the rod bearing journals to determine if they have issues, too? Thanks for your input.

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