Checking The Camshafts

CAMSHAFTS

EAS23850
                                                         3. Measure:
CHECKING THE CAMSHAFTS                                    • Camshaft runout
1. Check:                                                   Out of specification → Replace.
 • Camshaft lobes
                                                                   Camshaft runout limit
   Blue discoloration/pitting/scratches → Re-
                                                                    0.030 mm (0.0012 in)
   place the camshaft.
2. Measure:
 • Camshaft lobe dimensions “a” and “b”
   Out of specification → Replace the camshaft.

           Camshaft lobe dimensions
            Intake A
              33.050–33.150 mm (1.3012–
              1.3051 in)
            Limit
              32.050 mm (1.2618 in)
            Intake B
              24.997–25.097 mm (0.9841–                  4. Measure:
              0.9881 in)                                  • Camshaft-journal-to-camshaft-cap clearance
            Limit                                           Out of specification → Measure the camshaft
              23.997 mm (0.9448 in)                         journal diameter.
            Exhaust A
              33.050–33.150 mm (1.3012–                            Camshaft-journal-to-camshaft-
              1.3051 in)                                           cap clearance
            Limit                                                   0.028–0.062 mm (0.0011–0.0024
              32.950 mm (1.2972 in)                                 in)
            Exhaust B
              24.997–25.097 mm (0.9841–                  ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
              0.9881 in)                                 a. Install the camshaft into the cylinder head
            Limit                                           (without the dowel pins and camshaft caps).
              24.897 mm (0.9802 in)                      b. Position a strip of Plastigauge® “1” onto the
                                                            camshaft journal as shown.

                                                         c. Install the dowel pins and camshaft caps.

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