Cylinder Head Assembly: Specifications

Notice: Do not reuse the cylinder head bolts. NEW cylinder head bolts must be used. The cylinder head bolts are torque-to-yield bolts and cannot be reused once the initial torque is applied. During the initial torque of the cylinder head bolt the cylinder head bolt is stretched to achieve proper clamp load. Proper clamp load will not be achieved if a used cylinder head bolt is torqued again. A stretched cylinder head bolt can also break when torqued. Failure to replace the used cylinder head bolts with NEW cylinder head bolts can lead to improper clamp loads and extensive engine damage.






Cylinder Head Bolt - In Sequence
First Pass 30 Nm (22 ft. lbs.)
Second Pass 30 Nm + 120 Degrees (22 ft. lbs. + 120 Degrees)
Final Pass
Long Bolts # 1, 2, 3, 6, 7, 8, 9, 10, 11, 14, 16, 17 60 Degrees
Medium Bolts # 15, 18 45 Degrees
Short Bolts # 4, 5, 12, 13 30 Degrees

Cylinder Head Coolant Hole Plug 35 Nm (26 ft. lbs.)

Intake Manifold Bolt Torque Sequence:

Intake Manifold Bolt - In Sequence
First Pass 5 Nm (44 inch lbs.)
Second Pass 8 Nm (71 inch lbs.)
Third Pass 12 Nm (10 ft. lbs.)
Final Pass 15 Nm (12 ft. lbs.)

Exhaust Manifold
Center Bolt 35 Nm (12 ft. lbs.)
Nut 16 Nm (12 ft. lbs.)
Stud 20 Nm (15 ft. lbs.)

Exhaust Manifold Heat Shield
Bolt 25 Nm (18 ft. lbs.)
Nut 25 Nm (18 ft. lbs.)

Camshaft Retainer Bolt 12 Nm (106 inch lbs.)

Camshaft Sprocket Bolt 30 Nm (22 ft. lbs.)

Cylinder Head Height/Thickness 259.875 - 260.125 mm (10.231 - 10 241 inch)

Surface Flatness
Block Deck 0.050 mm (0.002 inch)
Exhaust Manifold 0.254 mm (0.010 inch)

Exhaust Manifold Deck 0.102 mm (0.004 inch)

Intake Manifold Deck 0.080 mm (0.003 inch)

Cylinder Head Deck
Entire Face 0.100 mm (0.004 inch)
Within 150 mm (6 inch) 0.050 mm (0.002 inch)