Cylinder Head Assembly: Specifications

NEW Cylinder Head Bolts
First Pass 50 Nm (37 Ft. Lbs.)
Final Pass 120 Degrees





Lower Intake Manifold Bolts 15 Nm (11 ft. lbs.)





Upper Intake Manifold Bolts And Studs 10 Nm (89 Inch Lbs.)

Throttle Body Nuts And Bolts 10 Nm (89 Inch Lbs.)


Cylinder Head
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)

Exhaust Manifold
Surface Flatness - Maximum 0.5 mm (0.02 inch)
0.003 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-inch)
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 Springs
Valve Spring Free Length 49.78 mm (1.960 inch)
Valve Spring Installed Height 42.93 - 44.45 mm (1.690 - 1.750 inch)
Valve Spring Load - Closed 334 N @ 43.69 mm (75 lbs. @ 1.72 inch)
Valve Spring Load - Open 1014 N @ 32.4 mm (228 lbs. @ 1.277 inch)
Valve Spring Total Number of Coils 6.6