GSIC - Global Service Information Center

# CAMSHAFT (for Bank 1) > INSPECTION

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1. INSPECT CAMSHAFT

1. Inspect the camshaft for runout.

   1. Place the camshaft on V-blocks.

   2. Using a dial indicator, measure the circle runout at the center journal.

      Maximum circle runout:
        0.06 mm (0.0024 in.)
      If the circle runout is greater than the maximum, replace the camshaft.

1. Inspect the cam lobes.

   1. Using a micrometer, measure the cam lobe height.

      Standard cam lobe height:

        Camshaft | Cam lobe height
        Intake | 44.168 to 44.268 mm (1.7389 to 1.7428 in.)
        Exhaust | 44.580 to 44.680 mm (1.7551 to 1.7591 in.)

      Minimum cam lobe height:

        Camshaft | Cam lobe height
        Intake | 44.018 mm (1.7330 in.)
        Exhaust | 44.430 mm (1.7492 in.)

      If the cam lobe height is less than the minimum, replace the camshaft.

1. Inspect the camshaft journals.

   1. Using a micrometer, measure the journal diameter.

      Standard journal diameter:

        Journal | Diameter
        No. 1 journal | 35.971 to 35.985 mm (1.4162 to 1.4167 in.)
        Other journal | 22.959 to 22.975 mm (0.9039 to 0.9045 in.)

      If the journal diameter is not as specified, check the oil clearance.

2. INSPECT CAMSHAFT TIMING GEAR

1. Fix the intake camshaft with a vise.

   NOTICE:
     Be careful not to damage the camshaft.

1. Align the knock pin hole in the camshaft timing gear assembly with the knock pin of the camshaft, and install the camshaft timing gear assembly with the bolt.

   Torque:
     100 N*m{ 1,020 kgf*cm , 74 ft.*lbf }

1. Confirm the camshaft timing gear assembly is locked.

1. Release the lock pin.

   1. Cover 4 oil paths of cam journal with vinyl tape as shown in the illustration.

      HINT:
        The 4 oil paths are provided in the groove of the camshaft. Plug two of the paths with rubber pieces.

   2. Break through the tapes of the advance side path and the retard side path on the opposite side of the groove.

   3. Put air pressure into 2 broken paths (the advance side path and the retard side path) with about 200 kPa (2.0 kgf/cm2, 28 psi).

      NOTICE:
        Cover the paths with cloth or equipment to avoid oil splashing.

   4. Confirm if the camshaft timing gear assembly rotates in the timing advance direction when weakening the air pressure of the timing retard path.

      HINT:
        The lock pin is released, and camshaft timing gear, rotates in the advance direction.

   5. When the camshaft timing gear comes to the most advanced position, take out the air pressure of the timing retard side path, and then, take out that of timing advance side path.

      NOTICE:
        Camshaft timing assembly gear occasionally shifts to the retard side abruptly, if the air compression of the advanced side path is released before retard side path. It often results the breakage of the lock pin.

1. Check the smooth revolution.

   1. Except the position where the lock pin meets at the most retard angle, let the camshaft timing gear assembly turn back and forth and check the movable range and that there is no disturbance.

      Standard:
        Movable range is about 31°.

      NOTICE:
        Be sure to perform this check by hand, instead of air pressure.

1. Check the lock in the most retarded position.

   1. Confirm that the camshaft timing gear assembly is locked at the most retarded position.

1. Remove the set bolt and camshaft timing gear assembly.

   NOTICE:
     Be sure not to remove the other 3 bolts.