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Home >> Isuzu >> 1991 >> Rodeo LS, RWD, Standard >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 2.8L V6 - VIN [R] & 3.1L - VIN [Z] >> Adjustments >> Valve Clearance Adjustment

Valve Clearance Adjustment

NOTE: Valve clearance adjustment is usually not required (engine uses hydraulic valve lifters). Perform the following procedures after servicing valve train.
  1. Remove valve covers. See VALVE COVERS under REMOVAL & INSTALLATION. Rotate crankshaft until cylinder No. 1 is at TDC of compression stroke. Ensure timing mark on crankshaft pulley aligns with "0" mark on timing chain cover. Grasp cylinder No. 1 intake valve push rod with thumb and forefinger, and attempt to rotate.
  2. Loosen adjusting nut until push rod rotates freely. See Fig 1 . Continue to rotate push rod back and forth while slowly tightening adjusting nut. When resistance is felt while rotating push rod, stop tightening adjusting nut. Valve train is now at zero lash. Tighten adjusting nut an additional 1 1/2 turns.
  3. Repeat step 2) for intake valves of cylinders No. 5 and 6, and exhaust valves of cylinders No. 1, 2 and 3. Rotate crankshaft one revolution until cylinder No. 4 is at TDC of compression stroke.
  4. Repeat step 2) for intake valves of cylinders No. 2, 3 and 4, and exhaust valves of cylinders No. 4, 5 and 6. Install valve cover and gasket.
Fig 1: Adjusting Valve Clearance
G90D07814Courtesy of ISUZU MOTOR CO.
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