Timing Drive Components —Camshaft Drive Cassette, LH
Special Tool(s)
/ Camshaft Gear Holding Tool
303-564 (T97T-6256-B)
/ Camshaft Gear Holding Tool Adapter
303-578 (T97T-6256-A)

Removal

  1. Remove the intake manifold. For additional information, refer to Intake Manifold in this section.
  1. Remove the LH valve cover. For additional information, refer to Valve Cover—LH in this section.
  1. Remove the RH valve cover. For additional information, refer to Valve Cover—RH in this section.
  1. Remove the fuel supply manifold. For additional information, refer to Section 303-04 .
  1. Remove the engine front cover. For additional information, refer to Engine Front Cover in this section.
  1. Remove the thermostat housing. For additional information, refer to Section 303-03 .
  1. Remove all of the roller followers. For additional information, refer to Roller Followers in this section.
  1. NOTE: You must retime the LH and RH camshafts when either camshaft is disturbed.

Turn the crankshaft clockwise to position number one cylinder at TDC.

  1. Remove the LH camshaft chain tensioner.
  1. Loosen the LH camshaft sprocket bolt.
  2. Install the special tools to hold the camshaft sprocket.
  3. Loosen but do not remove the bolt.
  1. Remove the tool and bolt.
  1. Hold the crankshaft from turning and loosen the jackshaft sprocket bolt.

  1. Remove the primary chain tensioner.
  1. Remove the primary chain and jackshaft sprocket.
  1. Remove the camshaft drive cassette.
  2. Remove the chain guide bolts.
  3. Remove the sprockets.
  4. Lift the chain and guide up and out of the cylinder head.
  1. Clean all surfaces. Clean all foreign material from engine.

Installation

  1. Install the chain guide through the cylinder head.
  1. Install the chain.
  1. Install the new chain guide bolts.
  1. NOTE: The camshaft chain sprockets must be orientated correctly.

Install the chain lower sprocket and the camshaft sprocket.

  1. Install, but do not tighten the camshaft sprocket bolt.

  1. Install the primary chain and gear.
  1. Install the primary drive chain tensioner.

  1. Hold the crankshaft from turning and tighten the jackshaft sprocket bolt in two stages.
  2. Stage 1: Tighten bolt to 45 Nm (33 lb-ft).
  3. Stage 2: Tighten bolt an additional 90 degrees.

  1. Install the engine front cover. For additional information, refer to Engine Front Cover in this section.
  1. Time the engine. For additional information, refer to Timing Drive Components—Camshaft Timing in this section.