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Home >> Toyota >> 1998 >> Avalon XLS >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Engine Mechanical (3.0L V6) >> Removal & Installation >> Camshafts >> Inspection

Removal & Installation: Camshafts: Inspection

  1. Inspect components for damage. Check camshaft journal diameter, lobe height and journal runout. Replace camshaft if not within specification. See CAMSHAFT  under ENGINE SPECIFICATIONS.
  2. Install camshaft in cylinder head. Using Plastigage, check camshaft oil clearance. Tighten camshaft bearing cap bolts to specification in sequence when checking oil clearance. See Figure. See TORQUE SPECIFICATIONS .
  3. Replace camshaft and/or cylinder head if oil clearance is not within specification.
  4. Check camshaft end play with camshaft bearing cap bolts tightened to specification. Replace camshaft and/or cylinder head if end play is not within specification.
  5. Install both camshafts without sub-gear installed on exhaust camshaft. Tighten camshaft bearing cap bolts to specification. Check gear backlash between camshaft gears.
  6. Replace camshaft if gear backlash exceeds specification. See CAMSHAFT  under ENGINE SPECIFICATIONS. Measure distance between ends of gear spring. Replace gear spring if distance is not .716-.740" (18.20-18.80 mm).
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