Grand Cherokee 2WD L6-4.0L VIN S (1997)
CHECKING END PLAY
Check crankshaft end play. Crankshaft end play is controlled by the thrust bearing which is flange and installed at the No. 2 main bearing position.
a. Attach a magnetic base dial indicator to the cylinder block at either the front or rear of the engine.
b. Position the dial indicator rod so that it is parallel to the center line of the crankshaft.
c. Pry the crankshaft forward, position the dial indicator to zero.
d. Pry the crankshaft forward and backward. Note the dial indicator readings. End play is the difference between the high and low measurements.
Correct end play is 0.038 - 0.165 mm (0.0015 - 0.0065 inch). The desired specifications are 0.051 - 0.064 mm (0.002 - 0.0025 inch).
e. If end play is not within specification, inspect crankshaft thrust faces for wear. If no wear is apparent, replace the thrust bearing and measure
end play. If end play is still not within specification, replace the crankshaft.
