Pacifica, 2003-2005

Timing Belt & Tensioner


Removal & Installation

3.5L Engines
  1. Before servicing the vehicle, refer to the Precautions section.

Use care when servicing a timing belt. Valve timing is absolutely critical to engine performance. If the valve timing marks on all drive sprockets are not properly aligned, engine damage will result. If only the belt and tensioner are being serviced, do not loosen the camshaft drive sprockets unless they are to be replaced. The sprockets have oversized openings and can be rotated several degrees in each direction on their shafts. This means the sprockets must be re-timed, requiring some special tools.

Fuel injection systems remain under pressure, even after the engine has been turned off. The fuel system pressure must be relieved before disconnecting any fuel lines. Failure to do so may result in fire and/or personal injury.

  1. Loosen the valve train rocker assemblies before servicing the timing components.
  3. Release the fuel system pressure using the recommended procedure.
  5. Remove or disconnect the following:

    Negative battery cable
    Cylinder head covers
    Accessory drive belts
    Drive belt tensioner
    Power steering pump bolts and position the pump aside
    Crankshaft damper with a quality puller tool gripping the inside of the pulley
    Lower front timing belt cover retainers

  7. Support the engine with a floor jack.

    Air cleaner assembly
    Front engine mount
    Fuel supply line from the rail
    Upper timing belt cover bolts and the cover

  9. If the timing belt is to be reused, mark the timing belt with the running direction for installation.
    Always align the timing marks always use the crankshaft to rotate the engine. Failure to do this will result in severe engine damage.

  11. Rotate the engine clockw