Cylinder Head Assembly: Specifications

Cylinder Head Deck Height - Measuring from the Centerline of Crankshaft to the Deck Face 234.57-234.82 mm (9.235-9.245 in)
Cylinder Head Deck Surface Flatness - Measured Within a 152.4 mm (6.0 in) Area 0.11 mm (0.004 in)
Cylinder Head Deck Surface Flatness - Measuring the Overall Length of the Block Deck 0.22 mm (0.008 in)



Cylinder Head M8 Bolts - in Sequence 30 Nm (22 lb ft)
Cylinder Head M11 Bolts - First Pass in Sequence 30 Nm (22 lb ft)
Cylinder Head M11 Bolts - Second Pass in Sequence 90 degrees
Cylinder Head M11 Bolts - Final Pass in Sequence 70 degrees
Cylinder Head Plug 20 Nm (15 lb ft)
Exhaust Manifold Bolts - First Pass 15 Nm (11 lb ft)
Exhaust Manifold Bolts - Final Pass 20 Nm (15 lb ft)
Exhaust Manifold Heat Shield Bolts 9 Nm (80 lb in)
Exhaust Manifold Studs 20 Nm (15 lb ft)



Intake Manifold Bolts - First Pass in Sequence 5 Nm (44 lb in)
Intake Manifold Bolts - Final Pass in Sequence 10 Nm (89 lb in)
Intake Manifold Sight Shield Retainer Bolts 5 Nm (44 lb in)
J 41798 M8 Bolt 25 Nm (18 lb ft)
J 41798 M10 Bolts 50 Nm (37 lb ft)
Valve Lifter Guide Bolts 12 Nm (106 lb in)
Valve Lifter Oil Manifold Bolts 25 Nm (18 lb ft)
Valve Rocker Arm Bolts 30 Nm (22 lb ft)
Valve Rocker Arm Cover Bolts 12 Nm (106 lb in)
Valve System
Valves - Valve Face Angle 45 degrees
Valves - Valve Face Width 1.25 mm (0.05 in)
Valves - Valve Lash Net Lash - No Adjustment
Valve Lift - Exhaust - Non Active Fuel Management 12.19 mm (0.480 in)
Valve Lift - Exhaust - Active Fuel Management 12.41 mm (0.489 in)
Valve Lift - Intake - Non Active Fuel Management 12.04 mm (0.474 in)
Valve Lift - Intake - Active Fuel Management 12.24 mm (0.488 in)
Valves - Valve Seat Angle 46 degrees
Valves - Valve Seat Runout 0.05 mm (0.002 in)
Valves - Valve Seat Width - Exhaust 1.78 mm (0.07 in)
Valves - Valve Seat Width - Intake 1.02 mm (0.04 in)
Valves - Valve Stem Diameter - Production 7.955-7.976 mm (0.313-0.314 in)
Valves - Valve Stem Diameter - Service 7.95 mm (0.313 in)
Valves - Valve Stem-to-Guide Clearance - Production - Exhaust 0.025-0.066 mm (0.001-0.0026 in)
Valves - Valve Stem-to-Guide Clearance - Service - Exhaust 0.093 mm (0.0037 in)
Valves - Valve Stem-to-Guide Clearance - Production - Intake 0.025-0.066 mm (0.001-0.0026 in)
Valves - Valve Stem-to-Guide Clearance - Service - Intake 0.093 mm (0.0037 in)
Rocker Arms - Valve Rocker Arm Ratio 1.70:1
Valve Springs - Valve Spring Free Length 52.9 mm (2.08 in)
Valve Springs - Valve Spring Installed Height 45.75 mm (1.8 in)
Valve Springs - Valve Spring Load - Closed 340 N at 45.75 mm (76 lb at 1.8 in)
Valve Springs - Valve Spring Load - Open 980 N at 33.55 mm (220 lb at 1.32 in)