300M, Concorde, Intrepid, LHS, 1998-2004

Crankshaft Front Seal


Removal & Installation

3.2L & 3.5L Engines

The front crankshaft seal procedures are for timing belt equipped engines only. For engines that utilize timing chains, please refer to the applicable procedure later in this section.

Note that the timing belt must be removed from the vehicle to perform this service. Use care to be sure all valve timing marks are carefully aligned both before removing the belt and after belt installation and all service has been completed. It may be good practice to set the engine to Top Dead Center (TDC) No. 1 cylinder compression stroke (firing position) and aligning all timing marks before removing the timing belt. This serves as a reference for all work that follows.

  1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
  3. Properly relieve the fuel system pressure.
  5. Drain the cooling system.
  7. Remove or disconnect the following:
    The sealer on the timing belt front cover may be reusable and should not be removed. Use silicone rubber adhesive sealant to replace any missing sealer.

    Negative battery cable
    Radiator and cooling fan module assembly
    Accessory drive belts
    Crankshaft damper bolt
    Timing belt front cover

    Timing belt and tensioner. Refer to the appropriate section for the removal and installation procedure.
    Crankshaft timing belt sprocket

  9. Locate the small dowel pin in the crankshaft. With a small punch, carefully tap out the dowel from the end of the crankshaft.

    Click image to see an enlarged view

    Fig. Removing the timing belt sprocket dowel pin from the crankshaft-3.5L engines

  11. Remove the crankshaft seal using tool 6341A, taking care not to nick the shaft seal surface or seal bore during removal.

To install:

  1. Inspect the crankshaft seal lip surface for varnish and dirt. Polish the area using 400 grit sandpaper to remove varnish as necessary.

    Click image to see an enlarged view

    Fig. Installing the crankshaft oil seal-3.5L engines

  3. Install or connect the following:

    Crankshaft seal using seal installer tool 6342
    Rear lower timing belt cover
    Dowel into the crankshaft so that it protrudes 0.047 in. (1.2mm)
    Timing belt sprocket at the crankshaft using tool C-4685C1, thrust bearing, washer and 12mm bolt or an equivalent setup to pull the sprocket onto crankshaft. Do not hammer on the sprocket.

  5. Verify that all valve timing marks are aligned.

    Timing belt and tensioner using the recommended procedure

  7. Rotate the crankshaft 2 complete turns and recheck the timing marks on the camshafts and crankshaft. The marks must align with their respective locations. If the marks do not align, repeat the timing belt installation procedure. When correct valve timing has been verified, install the timing belt covers.

    Crankshaft damper. Hold the crankshaft damper, using tool L-3281, and torque the bolt to 85 ft. lbs. (115 Nm).
    Accessory drive belts and adjust to the proper tension
    Radiator and cooling fan assemblies
    Negative battery cable

  9. Fill and bleed the cooling system.
  11. Start the vehicle, check for leaks and repair if necessary.