Cylinder Head Assembly: Specifications

Cylinder Head Bolt
First Pass 50 Nm (37 ft. lbs.)
Final Pass 120 degrees
EGR Valve Adapter to Cylinder Head Bolt/Stud 50 Nm (37 ft. lbs.)
Cylinder Head Deck Height 216.459 mm (8.522 inch)
Cylinder Head Deck Surface Flatness - Overall 0.0762 mm (0.003 inch)
Combustion Chamber Depth - at Measurement Point 3.9166-5.4356 mm (0.154-0.214 inch)
Cylinder Head Height/Thickness 103.492-104.178 mm (4.0745-4.1015 inch)
Surface Finish 0.0032 mm (0.000125 inch)
Surface Flatness - Block Deck 0.1016 mm (0.004 inch)
Surface Flatness - Exhaust Manifold Deck 0.1016 mm (0.004 inch)
Surface Flatness - Intake Manifold Deck 0.1016 mm (0.004 inch)
Valve Guide Bore - Exhaust 8.001-8.0213 mm (0.3150-0.3158 inch)
Valve Guide Bore - Intake 8.001-8.0213 mm (0.3150-0.3158 inch)
Valves Valve Face Angle 46 degrees
Valve Face Runout 0.0508 mm (0.002 inch)
Valve Head Diameter- Intake 46.37-46.63 mm (1.826-1.836 inch)
Valve Head Diameter- Exhaust 38.481-38.735 mm (1.515-1.525 inch)
Valve Length 119.464-119.972 mm (4.7033-4.7233 inch)
Valve Seat Angle 45 degrees
Valve Seat Runout 0.050 mm (0.002 inch)
Valve Seat Width - Intake 1.53-2.03 mm (0.060-0.080-in
Valve Seat Width - Exhaust 2.29-2.79 mm (0.090-0.110 inch)
Valve Stem Diameter 7.948-7.965 mm (0.3129-0.3136 inch)
Valve Stem-to-Guide Clearance - Intake 0.031-0.071 mm (0.0012-0.0028 inch)
Valve Stem-to-Guide Clearance - Exhaust 0.036-0.074 mm (0.0014-0.0029 inch)
Valve Rocker Arm Ratio 1.66:1
Valve Spring Free Length 49.78 mm (1.960 inch)
Valve Spring Installed Height 42.93-44.45 mm (1 1.690-1.750 inch)
Valve Spring Load - Closed 334 N 43.69 mm (75 lb 1.72 inch)
Valve Spring Load - Open 1014 N 32.4 mm (228 lb. 1.277 inch)
Valve Spring Total Number of Coils 6.6
Valve Lifter Diameter 21.387-21.405 mm (0.842-0.843 inch)