System Specifications

11 12 Cylinder Head M54
Cylinder head height
Original dimension 140.0 mm
Machining limit 139.7 mm

11 12 Cylinder Head Bolts M54





M10 Replace, wash and oil screws
First pass 40 Nm
Second pass Torque angle 90°
Final pass Torque angle 90°

11 61 1AZ Intake Manifold On Cylinder Head
M8 22 Nm
M7 15 Nm
M6 10 Nm

11 31 Camshaft Bearing Cap Bolts (M52TU/M54/M56)

1AZ ASA screws
(15 x)
Upper and lower bearing banks of exhaust camshaft to cylinder head
M7 X 70
Insert screws dry
Tighten screws from inside outwards
Jointing torque and angle of rotation must be observed without fail
Jointing torque 8 Nm
Torque angle 60°

2AZ ISA screws
(14 x)
Bearing cap of inlet camshaft to cylinder head
M6 x 30.5 9 Nm

Camshaft Sprocket Bolts (M54)
11 31 3AZ
Application torque 5 Nm
Jointing torque 20 Nm

11 62 1AZ Exhaust Manifold Nuts
Replace nuts
Coat screw connections with CRC copper paste
M6 10 Nm
M7 20 Nm
M8 23 Nm