Cylinder block

Cast iron cylinder block with cylinder bores machined directly into the block.

It has 5 crankshaft main bearings.

CYLINDER BORE

Pistons are marked relative to the cylinder block with letters A, X or B (Fig.2).

Fig. 2

• Standard nominal size: 83.009 mm.
• Group A: 83.000 to 83.006 mm.
• Group X: 83.006 to 83.012 mm.
• Group B: 83.012 to 83.018 mm.
• 1st oversize: 83.05 mm.
• 2nd oversize: 83.10 mm.

Wear limit: 0.2 mm.

Permissible out-of-round of the cylinder (new): 0 to 0.007 mm.

CYLINDER LEAKAGE (%)

• Permissible total leakage: ≤ 25.
• Permissible leakage (valves and cylinder head gasket): ≤ 10.
• Permissible leakage (piston rings): ≤ 20.

COMPRESSION PRESSURE (BAR)

• Reference value: 27 to 32.
• Permissible difference between cylinders: 3.

CRANKSHAFT BEARINGS

Ø of basic bore: 59 to 59.019 mm.

Width of basic bore at thrust bearing: 23.6 to 24 mm.

Maximum out-of-round and taper of original bore: 0.04 mm.