GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Tracker - 2WD 🢒 Engine 🢒 Engine Mechanical - 2.5L (LE8) 🢒 Camshaft Replacement - Right Side

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Remove the engine front cover. Refer to Engine Front Cover Replacement .
  3. Remove the spark plugs. Refer to Spark Plug Replacement in Engine Controls - 2.5L.
  4. Remove the left secondary timing chain. Refer to Secondary Timing Chain Replacement - Left Side .
  5. Remove the primary timing chain and right sprocket. Refer to Primary Timing Chain Replacement .

    6. Object Number: 648347 Size: SH
  6. Remove the 2 bolts and the timing chain guide (1).

    7. Object Number: 648133 Size: SH
  7. Remove the camshaft bearing cap bolts in the proper sequence.
  8. Remove the camshaft bearing caps.
  9. Remove the camshafts and secondary timing chain as a set.

Installation Procedure

    Object Number: 648577 Size: SH
  1. Verify that the keyway on the crankshaft (2) is properly positioned.
  2. Apply oil to the camshaft lobes and journals.

    3. Object Number: 648581 Size: SH
  3. Install the right timing chain to the camshaft sprockets by aligning the silver or yellow links (1) with the marks (2,3) on the camshaft sprockets.
  4. Install the camshafts with the timing chain to the cylinder head.

    5. Object Number: 648131 Size: SH
  5. Install the dowel pins (2) to the cylinder head.
  6. Apply oil to the camshaft bearing cap bolts.

    7. Object Number: 465393 Size: SH

    Notice: Avoid installing the bearing caps incorrectly. Cylinder head and camshaft damage may result.

  7. Install the camshaft bearing caps. The caps are marked intake or exhaust (1), position away from the timing chain (2), and direction toward the timing chain (3).

    8. Object Number: 648139 Size: SH
  8. Tighten the camshaft bearing caps.

    9. Tighten
    Tighten the camshaft bearing caps in 3 progressive steps in the sequence shown to 12 N·m (8.5 lb ft).


    Object Number: 648347 Size: SH
  9. Install the right secondary timing chain guide (1). Secure with the 2 bolts.

    10. Tighten
    Tighten the bolts to 11 N·m (7.5 lb ft).

  10. Install the right sprocket and primary timing chain. Refer to Primary Timing Chain Replacement .
  11. Install the left secondary timing chain. Refer to Secondary Timing Chain Replacement - Left Side .
  12. Install the engine front cover. Refer to Engine Front Cover Replacement .