GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2004 🢒 Colorado Pickup - 2WD 🢒 Engine 🢒 Engine Mechanical - 3.5L (L52) 🢒 Timing Chain Tensioner Shoe Replacement

Tools Required

J 44221 Camshaft Holding Tool

Removal Procedure
  1. Remove the camshaft cover. Refer to Camshaft Cover Replacement .
  2. Remove the engine front cover. Refer to Engine Front Cover Replacement .

    3. Object Number: 858340 Size: SH
  3. Rotate the crankshaft in the engine rotational direction clockwise, until the #1 piston is at top dead center (TDC) on the compression stroke.

    4. The word Delphi on the exhaust camshaft position actuator will be parallel with the cylinder head to cam cover mating surface.

    Caution: Refer to Camshaft Holding Tool Caution in the Preface section.


    Object Number: 858336 Size: SH
  4. Install the J 44221 to the rear of the camshafts.

    5. Object Number: 858344 Size: SH
  5. Using the timing marks on the following as a reference, make a mark on the timing chain links (1) adjacent to them:
    6. • The exhaust camshaft position actuator sprocket
    • The Intake camshaft sprocket
    • The crankshaft sprocket

    Object Number: 760721 Size: SH
  6. Release the tension on the timing chain by moving the tensioner shoe in.

    7. Object Number: 760718 Size: SH
  7. Place the tee into the tensioner to hold the shoe in place.

    8. Object Number: 637770 Size: SH
  8. Remove the cylinder head access hole plug.

    9. Object Number: 637584 Size: SH
  9. Remove the timing chain tensioner shoe bolt.
  10. Remove the timing chain tensioner shoe from the engine.

Installation Procedure

    Object Number: 637584 Size: SH
  1. Position the timing chain tensioner shoe to the engine.

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Install the timing chain tensioner shoe bolt.

    3. Tighten
    Tighten the timing chain tensioner shoe bolt to 25 N·m (18 lb ft).


    Object Number: 637770 Size: SH
  3. Install the cylinder head access hole plug.

    4. Tighten
    Tighten the cylinder head access hole plug to 5 N·m (44 lb in).


    Object Number: 760718 Size: SH
  4. Remove the tee in the timing chain tensioner to regain tension on the timing chain.

    5. Object Number: 858336 Size: SH
  5. Remove the J 44221 from the camshafts.

    6. Object Number: 858344 Size: SH

    Important: Every 7th link of the timing chain is darkened to aid in aligning the timing marks.

  6. Align the marked links (1) of the timing chain with the timing marks on the following:
    7. • The exhaust camshaft position actuator sprocket
    • The Intake camshaft sprocket
    • The crankshaft sprocket
  7. Install the engine front cover. Refer to Engine Front Cover Replacement .
  8. Install the camshaft cover. Refer to Camshaft Cover Replacement .