Valves and rockers
• exhaust valve • 35 mm
Max. valve movement with a valve clearance of
0.35 mm:
• inlet valve • 9.5 mm
• exhaust valve • 9.0 mm
Inlet valve stem diameter 7.960 - 7.975 mm
Exhaust valve stem diameter 7.925 - 7.940 mm
Inlet valve stem clearance 0.025 - 0.055 mm
• Reject limit • 0.30 mm
Exhaust valve stem clearance 0.060 - 0.090 mm
• Reject limit • 0.35 mm
Depth of valve head face below cylinder head
surface:
• inlet valve • 0.65 - 0.85 mm (maximum 2.20 mm)
• exhaust valve • 0.45 - 0.65 mm (maximum 2.20 mm)
Valve spring free length 75.1 mm
Spring pressure when spring compressed to a
length of:
• 41.0 mm • 300 ± 10 N
• 31.0 mm • 420 ± 15 N
Rocker arm shaft diameter 24.970 - 24.990 mm
Diameter of rocker arm bore 25.000 - 25.021 mm
Free length of rocker arm spring 88 mm
Spring pressure when spring compressed to a
length of 66 mm
75 - 95 N
2.1.5 Tappets and push rods
Tappets and push rods
Outside diameter of tappet 29.939 - 29.960 mm
Diameter of tappet bore in cylinder block 30.000 - 30.043 mm
Max. permissible push rod deflection (when free) 0.4 mm
Overall length of push rod (33-74 engines) 245 - 246.3 mm
Overall length of push rod (84-98 engines) 286 - 287.3 mm
2. Specifications
2-6 4th Generation Engines
8370 79492
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