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Home >> Toyota >> 1966 >> Stout Not Available Trans >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> TOYOTA Engines - (3R-B & 3R-C Engines) 4 Cylinder >> 1965-70 TOYOTA (3R-B & 3R-C Engines) 4 Cylinder >> Main & Connecting Rod Bearing Service

Main & Connecting Rod Bearing Service

  1. Remove engine, cylinder head, oil pan and piston and rod assemblies as previously outlined. Remove crankshaft pulley with a suitable puller (09213-60013). Remove clutch and flywheel or torque converter assembly.
  2. Remove front engine cover. Remove main bearing cap bolts and remove main bearing caps with bearing halves. Remove crankshaft and bearing halves in crankcase.
  3. Thoroughly clean crankshaft and blow out oil passages with compressed air. Check crankshaft for runout with a dial indicator on center main bearing journal. If runout exceeds 0.002", straighten or replace crankshaft.
  4. Check main and connecting rod bearing journals for taper or out-of-round. If taper or out-of-round exceeds 0.004", crankshaft must be ground to next undersize. Main and connecting rod bearings are available in 0.010", 0.020", 0.030" and 0.040" undersizes.
  5. Main and connecting rod bearing clearance is checked by the Plastigage method. To check connecting rod bearing clearance, make sure bearing halves and crankshaft journal are thoroughly clean. Place a piece of Plastigage wire on journal being checked. Install connecting rod cap on connecting rod and tighten nuts to specifications.
  6. Remove connecting rod cap and check flattened wire against scale on back of package. If clearance exceeds 0.0031", crankshaft must be ground to next undersize and appropriate size bearings installed. Main bearing clearance is checked in same manner, if clearance exceeds 0.003", crankshaft must be ground to next undersize and appropriate bearings installed.
  7. Installed bearing halves in crankcase and main bearing caps. Lubricate bearings and install crankshaft. Install main bearing caps with arrows pointing toward front of engine. Check crankshaft endplay. See THRUST BEARING ALIGNMENT . Install rear main bearing oil seal. See REAR MAIN BEARING OIL SEAL INSTALLATION . Position crankshaft and camshaft gears correctly. See VALVE TIMING .
  8. Tighten all bolts and nuts to specifications. To install remaining components, reverse removal procedure. Install engine as previously outlined.
    Fig 1: Crankshaft Endplay Checking
    G09326239Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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