Crankshaft & Main Bearings
- Main bearing caps are marked for location, with No 1 at front and No. 5 at rear of engine. Arrow on main bearing cap must point toward timing belt end of engine.
CAUTION:
Ensure jack screws are bottomed on main bearing cap before installing main cap. See Fig 1. Tap main bearing caps into position on cylinder block before tightening bolts to specification. This must be done to ensure proper torque reading. DO NOT
reuse main bearing cap bolts. Side bolts and jack screws may be reused.
- When installing main bearing caps, before tightening bolts to specification, pry crankshaft toward front of engine to align thrust bearing.
- Install new main bearing cap bolts. Tighten main bearing cap bolts in 2 steps to specification, in proper sequence. Refer to Fig 2. See TORQUE SPECIFICATIONS table at end of article.
- Tighten jack screws against cylinder block in 2 steps to specification, in proper sequence. See Fig 2. Jack screws are left-hand thread. Tighten side bolts to specification in 2 steps, in proper sequence. See Fig 2.
- Ensure main bearing oil clearance and crankshaft end play are within specification. See MAIN & CONNECTING ROD BEARINGS table under ENGINE SPECIFICATIONS at end of article. Replace thrust bearing if end play is not within specification.
Courtesy of FORD MOTOR CO.
Courtesy of FORD MOTOR CO.