Crankshaft End Play - Measure; Crankcase - Turn Over - Mitsubishi S12A2 Service Manual

1.8 Crankshaft End Play - Measure

(1) Verify the smooth rotation of the crankshaft.
(2) Apply a dial gauge probe to the rear end face of crank-
shaft.
(3) Using a bar, move the crankshaft fully to the front and
rear to read the each measurement. The end play is the
difference between the front and rear measurements.
If the value exceeds the standard value, inspect the
thrust plates and the crankshaft.
If the end play is less than the standard value, loosen
the rear most bearing cap bolts and move the crankshaft
back and forth, and measure the end play again.
(4) After tightening the rearmost main bearing cap to the
specified torque, measure the end play again to verify.
(5) Again, verify the crankshaft smooth rotation.
(6) Verify again all main bearing cap bolts and side bolts to
make sure that they are tightened properly.
Item
0.200 to 0.395 mm
Crankshaft end play
[0.0079 to 0.0156 in.]

1.9 Crankcase - Turn Over

Using a turnover machine, turn over the crankcase.When
the turnover machine is not available, hitch slings to the
crankcase using wood pieces and cloth pads, and raise the
crankcase with a hoist or crane. Then lay it on the wooden
block with its side facing downward.Then, change the sling
positions. Turn over the crankcase on the wooden blocks to
turn it to the normal position.
Standard value Limit value
0.500 mm
[0.0197 in.]
Chapter 7 ASSEMBLY OF BASIC ENGINE
Crankshaft End Play - Measure
Weight of crankcase and crankshaft assembly:
Weight of crankcase and crankshaft assembly: Weight of crankcase and crankshaft assembly:
approx. 1370 kg [3020 lb]
approx. 1370 kg [3020 lb] approx. 1370 kg [3020 lb]
Crankcase - Turn Over
7-7