04 · General

Crankshaft

Data, torque & toolsCrankshaft

Crankshaft end-float	0.10 to 0.30 mm
Service limit	0.40 mm
Thrust washer halves thickness	2.61 to 2.65 mm
Main journal diameter:
Grade 1	67.743 to 67.749 mm
Grade 2	67.737 to 67.743 mm
Grade 3	67.731 to 67.737 mm
Main housing diameter:
Grade A	71.600 to 71.593mm
Grade B	71.593 to 71.586mm
Grade C	71.586 to 71.579mm
Maximum out of round	0.010 mm
Clearance in bearings	0.021 to 0.039 mm
Main bearing thicknesses:
Red	1.930 to 1.927mm
Blue	1.927 to 1.924mm
Green	1.924 to 1.921mm
Yellow	1.921 to 1.918mm
Black	1.918 to 1.915mm
Big-end journal diameter:
Grade A	54.049 to 54.055 mm
Grade B	54.043 to 54.049 mm
Grade C	54.037 to 54.043 mm
Big-end housing diameter:
Grade 7	57.677 to 57.671mm
Grade 8	57.671 to 57.665mm
Grade 9	57.665 to 57.659mm
Big-end bearing thicknesses:
Red	1.803 to 1.800mm
Blue	1.800 to 1.797mm
Green	1.797 to 1.794mm
Yellow	1.794 to 1.791mm
Black	1.791 to 1.788mm
Maximum out of round	0.010 mm
Clearance in bearings	0.022 to 0.040 mm

New ring to groove clearance:

Top compression	0.040 to 0.072 mm
2nd compression	0.030 to 0.062 mm
Oil control	0.010 to 0.180 mm
Ring fitted gap 20 mm from top of bore:
Top compression	0.20 to 0.35 mm
2nd compression	0.28 to 0.48 mm
Oil control	0.15 to 0.40 mm
Piston diameter:
Grade A	79.965 to 79.980 mm
Grade B	79.981 to 79.995 mm
Clearance in bore	0.02 to 0.05 mm

Cylinder liner bore:

RED Grade A	80.000 to 80.015 mm
BLUE Grade B	80.015 to 80.016 mm

Parts & tools for this job For Rover Engine & gearbox overhaul

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