KRYOTEC ENGINE 4 TIMING ANGLES Operation control clearance (mm) Intake ( • ) Exhaust ( • ) Control timing clearance (mm) Intake - Exhaust - Intake Opening (BTDC) 10ᵒ Opening (ATDC) - Closed (after BDC) 2ᵒ Exhaust Opening (before BDC) 40ᵒ Opening (BTDC) - Closed (ATDC) 9ᵒ ( • ) Hydraulic Tappets CYLINDER BORE Measure Value Internal diameter cylinder Bore - Class A (mm) 83.000 - 83.010 Internal diameter cylinder Bore - Class B (mm) 83.010 - 83.020 Internal diameter cylinder Bore - Class C (mm) 83.020 - 83.030 Cylinder Bore Out of Round (mm) < 0.05 Cylinder Bore Taper < 0.005 Oversize inner diameter cylinder bore (mm) 0.1 CYLINDER HEAD Measure Value Cylinder head gasket thickness with maximum protrusion piston (mm) protrusion -0.110 - + 0.230 thickness (no hole) 0.95 +/- 0.05 Cylinder head gasket thickness with maximum protrusion piston (mm) protrusion -0.231 - + 0.330 thickness (one hole) 0.95 +/- 0.05 Cylinder head gasket thickness with maximum protrusion piston (mm) protrusion + 0.331 - + 0.425 thickness (two holes) 1.15 +/- 0.05 Nominal cylinder head height (mm) 107 +/- 0.05 Flatness Cylinder Head Surface (mm) < 0.1 VALVES Valvestemdiameter - Exhaust (mm) 4.972 ÷ 4.990 Valvestemdiameter- Intake (mm) 4.982 ÷ 5.000 VALVE GUIDES Valvestemdiameter- Intake (mm) 4.982 ÷ 5.000 Valvestemdiameter - Exhaust (mm) 4.972 ÷ 4.990 Outer diameter valve guides (mm) 010 ÷ 10.030 Increase outer diameter valve guides (mm) 05 / 0.10 / 0.25 Internal diameter valve guides (mm) 015 ÷ 5.033 VALVE SPRINGS Valvespring free length (mm) 44.1 Valvespring lengthunder loadof 22.80÷25.20daN (mm) 34 Valvespring lengthunder loadof 43.90÷48.10daN (mm) 25.5
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