Mechanical Specifications
420A Engine:
TIGHTENING SPECIFICATIONS
1. Lubricate bearing journals and cams with clean oil and install the camshafts.
2. Install right and left camshaft bearing caps No. 2 thru No. 5 and right No.6.
3. Tighten the M6 fasteners to 12 Nm (9 ft. lbs.) in sequence shown in the figure.
4. Apply Loctite 51817, or equivalent, to the No. 1 and No. 6 bearing caps.
5. Install bearing caps and tighten M8 fasteners to 28 Nm (21 ft. lbs.).
6. Bearing end caps must be installed before seals can be installed.
DIMENSIONS
Bearing Bore Diameter: 26.020 - 26.041 mm (1.024 - 1.025 inch)
Bearing Clearance: 0.069 - 0.071 mm (0.0027 - 0.0028 inch)
Bearing Journal Diameter: 25.951 - 25.970 mm (1.0217 - 1.0224 inch)