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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 638 (Engine Mechanical - 4.0L (Unit Repair)) >> Repair Instructions >> Camshaft Timing Drive Components Cleaning and Inspection >> Visual Inspection

Visual Inspection

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect the camshaft, crankshaft and intermediate sprockets for damage. The camshaft, crankshaft and intermediate sprockets are not repairable. If a camshaft, crankshaft and/or intermediate sprocket is damaged, the camshaft, crankshaft and/or intermediate sprocket must be replaced.
  2. Inspect the intermediate sprocket bearing bore for damage. The intermediate sprocket bearing bore is not repairable. If the intermediate sprocket bearing bore is damaged, the intermediate sprocket must be replaced.
  3. Inspect the timing guides and shoes for wear, cracks or damage. The timing guides and shoes are not repairable. If a timing guide or shoe is worn cracked or damaged, the timing guide or shoe must be replaced.
  4. Inspect the timing chain tensioners for damage. The timing chain tensioners are not repairable. If a timing chain tensioner is damaged, the timing chain tensioner must be replaced.
  5. Inspect all bolts for damage. If a bolt is damaged, the bolt must be replaced.
  6. Inspect the timing chains for damage. The timing chains are not repairable. If a timing chain is damaged, the timing chain must be replaced.