SERVICE MANUAL CRANKSHAFT, MAIN BEARINGS, FLYWHEEL & CRANKCASE Section 6 3. For  OLD  bearings  and  caps,  if  the  crankshaft, bearings  and  crankcase  are  in  good  condition, the bearing running clearance should fall within 0.046 mm (0.0018 in.) 0.130 mm (0.0051 in.) a. If  the  clearance  obtained  is  more  or  less than  the  specified  amount,  replace  with  a new bearing. b. Should  the  clearance  remain  excessive,  it may be necessary to replace the crankshaft. 4. For NEW bearings and caps proceed as follows: a. Measure    the  diameter    of  the  crankshaft journal and record this reading.  If it is less than 85.705 mm (3.3742 in.) 85.738 mm (3.3755 in.,) subtract  the  difference  from  the  virgin  lead  or  Platigage reading. b. Subtract the  bearing  running clearance of 0.046 mm (0.0018 in.) 0.130 mm (0.0051 in., ) from the measurement obtained in Step 4a.  Mill or grind this  amount  from  surface  "D"  (3,  Fig.    28)  of  the  new bearing cap. NOTE:    Surface  "D"  (Fig.    27)  must  be  held  square with the bearing cap bore. c. Recheck      the   bearing   running   clearance, with virgin lead or plastigage, to assure 0.046 mm (0.0018 in.) 0.130 mm (0.0051 in.) specifications are met. 5. When acceptable results are achieved for either old or new parts proceed as follows: a. Remove the Plastigage or Virgin lead. b. Add clean engine oil to the bearing and install the center main bearing cap. c. Torque the cap screws to 155 N-m (115 lbf- ft). 6. Check     each     main     bearing     in     the     manner described. Continue  Crankshaft  and  Main  Bearing  installation as follows: 1. Check the crankshaft end clearance as outlined: a. Loosen the rear main bearing cap screws. b. Hold the crankshaft towards the front of the engine,    using    a    suitable    bar    or    large screwdriver, so the crankshaft thrust surface is tight against the rear of the thrust flange of the bearing in the crankcase. c. Check   the   clearance   across   the   bearing split as shown in Fig.  30. 0.15 mm   (0.006 in.) 0.30 mm    (0.012 in.) clearance must be maintained. Figure 30.  - Checking Crankshaft End CGES-185-3 PRINTED IN UNITED STATES OF AMERICA Page 23