Ford Crown Victoria/Grand Marquis 1989-1998

Rear Main Seal

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REMOVAL & INSTALLATION



4.6L Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the transmission; refer to Drive Train .
  4.  
  5. Remove the flexplate from the crankshaft.
  6.  
  7. Remove the rear main seal retainer from the cylinder block.
  8.  
  9. Securely support the seal retainer and remove the seal, using a sharp pick.
  10.  

To install:
  1. Clean and inspect the retainer and retainer-to-cylinder block mating surfaces.
  2.  
  3. Apply a 0.060 in. (1.5mm) continuous bead of a suitable gasket maker to the cylinder block.
  4.  
  5. Install the seal retainer and tighten the bolts, in sequence, to 6-9 ft. lbs. (8-12 Nm).
  6.  
  7. Install the new rear main seal using a suitable rear main seal installation tool.
  8.  
  9. Install the flexplate and tighten the bolts, in a crisscross pattern, to 54-64 ft. lbs. (73-87 Nm).
  10.  
  11. Install the transmission and lower the vehicle.
  12.  
  13. Connect the negative battery cable, start the engine and check for leaks.
  14.  

See Figures 1 and 2

Click image to see an enlarged view

Fig. Fig. 1: Apply gasket maker to the cylinder block as shown-4.6L engine



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Fig. Fig. 2: Rear main seal retainer bolt torque sequence-4.6L engine

5.0L and 5.8L Engines

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the transmission; refer to Drive Train .
  4.  
  5. Remove the flexplate from the crankshaft.
  6.  
  7. Punch 2 holes in the crankshaft rear oil seal on opposite sides of the crankshaft, just above the bearing cap to cylinder block split line. Install a sheet metal screw in each of the holes or use a small slide hammer and pry the crankshaft rear main oil seal from the block.
  8.  

Use extreme caution not to scratch the crankshaft oil seal surface.

To install:
  1. Clean the oil seal recess in the cylinder block and main bearing cap.
  2.  
  3. Coat the seal and all of the seal mounting surfaces with oil. Position the seal on a suitable rear main seal installation tool, then position the tool and seal to the rear of the engine.
  4.  
  5. Alternate bolt tightening to seat the seal properly. The rear face of the seal must be within 0.005 in. (0.127mm) of the rear face of the block.
  6.  
  7. Install the flexplate. Apply pipe sealant to the flexplate bolt threads, then tighten them, in a crisscross pattern, to 75-85 ft. lbs. (102-115 Nm).
  8.  
  9. Install the transmission and lower the vehicle.
  10.  
  11. Connect the negative battery cable, start the engine and check for leaks.
  12.  

See Figure 3

Click image to see an enlarged view

Fig. Fig. 3: Rear main seal installation-5.0L and 5.8L engines shown

 
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