XJR (X308) V8-4.0L SC (AJ27) (2000)
Crankshaft: Application and ID
Cylinder and Crankshaft Grading
Example - *PJEAL* - Crankshaft Main Journal Diameter
Read the grade letters from LEFT to RIGHT = FRONT to REAR of engine eg. for this example engine, the crank journal at the front of the engine is
grade P. and at the rear is grade L.
The selection of main bearing shells is described in the following chart.
Example - *ABAA* - Crankshaft (Big End Bearing) Crankpin Diameter
Read the grade letters from LEFT to RIGHT = FRONT to REAR of engine eg. for this example engine, the crankpin at the front of the engine is grade
A and at the rear is also grade A.
Grade A = 56,000 to 55,994 mm (Bearing Shell Color Code - Blue).
Grade B = 55,994 to 55,988 mm (Bearing Shell Color Code - Green).
Grade C = 55,988 to 55,982 mm (Bearing Shell Color Code - Yellow).
Example - *21222122* - Cylinder Bore and Piston
The cylinder bore grades read from LEFT to RIGHT as follows:
Bank 2 - Cylinder 1, Bank 2 - Cylinder 2, Bank 2 - Cylinder 3, Bank 2 - Cylinder 4, Bank 1 - Cylinder 4,
Bank 1 - Cylinder 3, Bank 1 - Cylinder 2, Bank 1 - Cylinder 1. (Note, in earlier publications Bank 1 was described as A-Bank and Bank 2 as
B-Bank)
Grade 1 Bore = 85,990 to 86,000 mm.
Grade 2 Bore = 86,000 to 86,010 mm.
Grade 3 Bore = 86,010 to 86,020 mm.
Example - *WPPNN* - Crankshaft Main Bearing Bore in Cylinder Block
Read the grade letters from LEFT to RIGHT = FRONT to REAR of engine eg. for this example engine, the crank journal bore at the front of the
engine is grade W. and at the rear is grade N.
The selection of main bearing shells is described in the following chart.