Crankshaft Main Bearing
DimensionsClearance to Crankshaft
Desired: 0.025-0.045 mm (0.0010-0.0018 inch)
Allowable: 0.025-0.050 mm (0.0010-0.0020 inch)
Bearing Wall Thickness
Grade 1: 2.497 mm (0.0983 inch)
Grade 2 *: 2.501 mm (0.0985 inch)
Grade 3: 2.505 mm (0.0986 inch)
* 0.250 mm (0.010 inch) Undersize, Add 0.125 mm (0.005 inch) to standard or grade 2 thickness.
Tightening Specifications
1. Clean lower cylinder block to upper cylinder block sealing surfaces with a shop towel and Metal Surface Cleaner F4AZ-19A536-RA or equivalent meeting Ford specification WSE-M5B392-A to remove all residues that may interfere with the sealer's ability to adhere.
NOTE: Lower cylinder block must be installed and bolts tightened within four minutes of sealer application.
2. Apply a 1 mm (0.03937 inch) bead of Black Silicone Rubber F4AZ-19562-B or equivalent meeting Ford specification WSE-M4G323-A1 to lower cylinder block sealing surface of cylinder block and a 3 mm (0.118 inch) bead at grooves as illustrated.
3. Install lower cylinder block over eight cylinder block alignment dowels and onto upper cylinder block.
CAUTION: Lower cylinder block retaining bolt numbers 1 through 16 must be replaced with NEW bolts. They are torque-to-yield designed and cannot be reused.
NOTE:
Do not rotate crankshaft until all lower cylinder block retaining bolts are tightened to specification.
Tighten all lower cylinder block to upper cylinder block retaining bolts within four minutes of installing lower cylinder block to upper cylinder block.
Do NOT lubricate lower cylinder block to upper cylinder block retaining bolts.
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4. Install, but do not tighten, lower cylinder block to upper cylinder block retaining bolts.
5. Tighten lower cylinder block to upper cylinder block bolts in sequence shown at this time to 3-5 Nm (27-44 inch lbs.).
6. Push crankshaft rearward and then lightly, using a prybar or a similar tool, seat crankshaft thrust washer forward.
7. Tighten lower cylinder block to upper cylinder block retaining bolts in sequence, as follows:
- Tighten fasteners 1 through 8 to 22-28 Nm (17-20 ft. lbs.).
- Tighten fasteners 9 through 16 to 37-43 Nm (28-31 ft. lbs.).
- Rotate fasteners 1 through 16 an additional 85-95°.
- Tighten fasteners 17 through 22 to 20-30 Nm (15-22 ft. lbs.).
8. Verify crankshaft rotates freely and does not bind. Clean any residual sealer from inside the cylinder block with a clean shop towel.
NOTE: Lubricate crankshaft flange and crankshaft rear oil seal inside diameter with Engine Assembly Lubricant prior to installation of crankshaft rear oil seal.