Mustang Cobra V8-281 4.6L DOHC VIN V MFI (1997)
Crankshaft Main Bearing: Specifications
General
Clearance
Desired ... 0.025-0.045 mm (0.00098-0.00177 inch)
Allowable ... 0.025-0.050 mm (0.00098-0.00197 inch)
*
Bearing Wall Thickness ... 2.451 mm (0.0965 inch)
*
For 1.27 mm (0.050 inch) undersize, add 0.635 mm (0.025 inch) to standard thickness. For 0.050 mm (0.001969 inch) undersize, add 0.025 mm
(0.000984 inch) to standard thickness.
Tightening Specifications
NOTE: Prior to service re-installation or replacement of fasteners, all threads and contact surfaces must be lubricated with clean engine oil
meeting Ford specification WSS-M2C153-F.
1. Loosely install all vertical main cap retaining bolts and stud bolt using new stud and bolts in bolt position 1 through 20.
2. Tap main bearing caps with a brass hammer to seat caps properly.
3. Tighten in sequence the vertical main bolts in positions 1 through 8 to 8-12 Nm (71-106 inch lbs.).
4. Tighten vertical main bolts in positions 10 through 18 to 8-12 Nm (71-106 inch lbs.).
5. Push crankshaft forward and wedge using a prybar or similar tool to seat crankshaft thrust washer.
NOTE: No.5 main bearing cap must be seated above until the main bearing cap bolts are fully tightened as required according to the following
procedure.
6. With crankshaft wedged forward, use prybars or similar tools to wedge both RH and LH front edges of No. 5 main bearing cap rearward to
position the lower crankshaft thrust main bearing rear face properly against the thrust face of the crankshaft.
NOTE: Wedge crankshaft in direction of arrow to fully seat crankshaft thrust washer. Leave prybars in position until all main bearing bolts are
tightened.
7. Tighten vertical main bolts 9, 10, 19 and 20 to 8-12 Nm (71-106 inch lbs.) in order.
8. Tighten vertical main bolts 1 through 10 to 22-28 Nm (17-20 ft. lbs.).
9. Tighten vertical main bolts 11 through 20 to 37-43 Nm (28-31 ft. lbs.).
10. Rotate vertical main bolts 1 through 20, turning clockwise, 85-95°.
11. Remove all wedges from No.5 main cap and from crankshaft.
12. Tighten crankshaft main bearing cap adjusting screws, positions 21 through 30, in sequence to 5 Nm (44 inch lbs.).
13. Retighten crankshaft main bearing cap adjusting screw in sequence to 10 Nm (88 inch lbs.).
