SERVICE MANUALCRANKSHAFT, MAIN BEARINGS, FLYWHEEL & CRANKCASESection 67.Subtract dimension "A" of the OLD cap fromdimension "A" of the NEW cap and record thedifference. Mill or grind this amount fromsurface "C" (Fig. 27) of the new cap. Dimension"A" of both caps will now be equal.Figure 27. - Bearing Cap Finished LengthSurface "C"Surface "B"Surface "D"NOTE:Surface "C" (Fig. 27) must be held squarewith surface "D" and parallel to the bearing bore.8.Mill or grind surface "B" (Fig. 27) of the new capuntil the dimension "E" 153.67153.72 mm(6.050-6.052 in.) shown from surface "C" to "B"is obtained.NOTE:Surface "B" (Fig. 27) must be held squarewith surface "D" and parallel to the bearing bore.Fit Main Bearings in Main Bearing Caps as follows:1.Install a new bearing in a new bearing cap or theoriginal bearing in the original bearing cap, ascalled for.2.Check the bearing clearance as follows:NOTE:DO NOT turn the crankshaft during thisprocedure.a.Clean the bearing surface and theexposed half of the crankshaft journal.Be sure these surfaces are free of oil.b.Place a suitable length of 0.010 inchvirgin lead wire or a piece ofPlastigage across the bearing surfaceas shown in Fig. 28.Figure 28. - Position of Virgin Lead or Plastigage1.Surface "D"2.Bearing3.Plastigagec.Install the bearing cap and torque the capscrews to 155 N•m (115 Ibf-ft).d.Remove the bearing cap. When virginlead is used, measure the crushedthickness with a micrometer and record theresults. When Plastigage is used, theflattened plastic material will be foundadhearing to either the bearing or thecrankshaft. DO NOT remove theplastigage. Determine bearing clearanceby comparing the width of the flattenedplastic with the graduations on the envelopeas shown in Fig. 29.Figure 29. - Reading Bearing Clearance with PlastigageCGES-185-3PRINTED IN UNITED STATES OF AMERICAPage 22
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