Crankshaft Main Bearings

The crankshaft main bearings are precision select fit. To check the bearing clearance or to select fit a new bearing, refer to Section 03-00.

Removal

1. Remove oil pan (6675) as outlined.

2. Remove oil pump screen cover and tube (6622) .

3. Replace one crankshaft main bearing at a time, leaving the other crankshaft main bearings securely fastened.

   Remove crankshaft main bearing cap to which new bearings are to be installed.

4. Insert Main Bearing Insert Tool, TOOL-6331-E or equivalent in the oil hole in the crankshaft (6303).

5. Rotate crankshaft in the direction of engine rotation to force bearing out of the cylinder block (6010) .

6. Clean crankshaft journals. Inspect journals and thrust faces (thrust bearing) for nicks, burrs or bearing pickup that would cause premature crankshaft main bearing wear.

7. If the crankshaft rear oil seal (6701) is to be replaced, refer to Crankshaft Rear Oil Seal Removal and Installation.

Installation

Lightly oil all bolt and stud threads before installation.

1. Lubricate and position the upper crankshaft main bearing on crankshaft journal with plain end started into the side of cylinder block with locking tang slot. Line up crankshaft main bearing tang with slot in cylinder block .

2. Install Main Bearing Insert Tool, TOOL-6331-E or equivalent in crankshaft journal oil hole.

3. With crankshaft main bearing and tool in position, rotate crankshaft so that the tool catches the edge of the crankshaft main bearing (6333) and pushes crankshaft main bearing into position in cylinder block . Remove tool.

4. Install crankshaft main bearing in crankshaft main bearing cap.

5. If crankshaft main bearing clearance is to be checked, refer to Section 03-00.

6. If No. 1 or No. 2 crankshaft main bearing was removed, lubricate bearing surface with Engine Assembly Lubricant D9AZ-19579-D or equivalent meeting Ford specification ESR-M99C80-A and install crankshaft main bearing cap.

   Tighten retaining bolts to 110-120 Nm (81-88 lb-ft).

7. If rear crankshaft main bearing was removed, perform the following:
   1. Remove all traces of sealant from main bearing cap to cylinder block parting line.

      NOTE: The crankshaft main bearing cap must be installed within 15 minutes after the silicone sealer application. After this time, the sealer may start to set-up and its sealing effectiveness may be reduced.

   2. Apply a 3mm (1/8 inch) bead of Silicone Rubber D6AZ-19562-BA or equivalent meeting Ford specifications ESB-M4G92-A and ESE-M4G195-A to main bearing cap-to-cylinder block parting line.
   3. Lubricate bearing surfaces with Engine Assembly Lubricant D9AZ-19579-D or equivalent meeting Ford specification ESR-M99C80-A and install crankshaft main bearing cap. Tighten retaining bolts to 81-89 Nm (110-120 lb-ft).

8. If crankshaft thrust main bearing (6337) was removed, perform the following:
   1. Lubricate bearing surface with Engine Assembly Lubricant D9AZ-19579-D or equivalent meeting Ford specification ESR-M99C80-A and install crankshaft main bearing cap with bolt and finger-tighten.
   2. Pry crankshaft forward against thrust surface on upper crankshaft thrust main bearing , while holding bearing cap to the rear. This aligns thrust rear surfaces on both halves of the crankshaft thrust main bearing.
   3. While holding crankshaft forward, tighten crankshaft main bearing cap retaining bolts to 110-120 Nm (81-89 lb-ft).

9. Install oil pump screen cover and tube with a new oil pump inlet tube gasket (6626) .

   Tighten oil pump screen cover and tube retaining bolts to 20-30 Nm (15-22 lb-ft).

   Tighten oil pump screen cover and tube support bracket retaining nut to 40-55 Nm (30-40 lb-ft).

10. Install oil pan as outlined.