Checking The Timing Chain Guides

CAMSHAFTS

NOTE:
• Tighten the camshaft cap bolts in stages and in
  a crisscross pattern, working from the inner
  caps out.
• Do not turn the camshaft when measuring the
  camshaft journal-to-camshaft cap clearance
  with the Plastigauge®.

                Camshaft cap bolt
       T.
           R.
                 10 Nm (1.0 m·kg, 7.2 ft·lb)                 a. 1/4 tooth
                                                             b. Correct
d. Remove the camshaft caps and then mea-                    1. Timing chain roller
   sure the width of the Plastigauge® “1”.                   2. Camshaft sprocket

                                                           EAS23950

                                                           CHECKING THE TIMING CHAIN GUIDES
                                                           1. Check:
                                                            • Timing chain guide (exhaust side)
                                                            • Timing chain guide (intake side)
                                                            • Timing chain guide (upper side)
                                                              Damage/wear → Replace the defective
                                                              part(s).
                                                           EAS23970
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲                           CHECKING THE TIMING CHAIN TENSIONER
5. Measure:                                                1. Check:
 • Camshaft journal diameter “a”                            • Timing chain tensioner
   Out of specification → Replace the camshaft.               Cracks/damage/rough movement → Re-
   Within specification → Replace the cylinder                place.
   head and the camshaft caps as a set.                    ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
                                                           a. Lightly press the timing chain tensioner rod
                Camshaft journal diameter                     into the timing chain tensioner housing by
                 24.459–24.472 mm (0.9630–                    hand.
                 0.9635 in)                            NOTE:
                                                           While pressing the timing chain tensioner rod,
                                                           wind it clockwise with a thin screwdriver “1” until
                                                           it stops.

EAS23870

CHECKING THE CAMSHAFT SPROCKETS
1. Check:
 • Camshaft sprockets                                      b. Remove the screwdriver and slowly release
   More than 1/4 tooth wear “a” → Replace the                 the timing chain tensioner rod.
   camshaft sprockets, timing chain, and crank-            c. Make sure that the timing chain tensioner rod
   shaft as a set.                                            comes out of the timing chain tensioner hous-
                                                              ing smoothly. If there is rough movement, re-
                                                              place the timing chain tensioner.

                                                    5-16