Cylinder Head Assembly: Specifications

1. Tighten the M12 cylinder head bolts (1-10) a first pass in sequence to 20 Nm (15 lb ft).
2. Tighten the M12 cylinder head bolts (1-10) a second pass in sequence to 80 Nm (60 lb ft).
3. Tighten the M12 cylinder head bolts (1-10) a third pass in sequence to 90 degrees using the J-45059 - meter.
4. Tighten the M12 cylinder head bolts (1-10) a final pass in sequence to 45 degrees using the J-45059 - meter.
5. Tighten the M8 cylinder head bolts (11-15) to 30 Nm (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward tightening all of the bolts.

CYLINDER HEAD BOLT RE-USABILITY

Note: Do not use the cylinder head bolts again. Install NEW cylinder head bolts during assembly.
Do not use any type of sealant on the cylinder head gasket, unless specified.
The cylinder head gaskets must be installed in the proper direction and position.

CYLINDER HEAD SURFACE VARIATION

CYLINDER HEAD

Cylinder Head Height/Thickness - Measured from the Cylinder Head Deck to Machining Pad Locations 6.88-7.12 mm (0.271-0.283 in)

Surface Flatness - Block Deck
Measured within a 152.4 mm (6.0 in) Area 0.08 mm (0.003 in)
Measuring the Overall Length of the Cylinder Head 0.1 mm (0.004 in)

Surface Flatness
Exhaust Manifold Deck 0.1 mm (0.004 in)
Intake Manifold Deck 0.08 mm (0.0031 in)

CYLINDER BLOCK

Cylinder Head Deck Surface Flatness
Measured within a 152.4 mm (6.0 in) Area 0.11 mm (0.004 in)
Measuring the Overall Length of the Block Deck 0.22 mm (0.008 in)

EXHAUST MANIFOLD

Exhaust Manifold Bolts
First Pass 15 Nm (11 lb ft)
Final Pass 20 Nm (15 lb ft)

INTAKE MANIFOLD

Tighten the intake manifold bolts to the sequence below:

First Pass: Tighten the intake manifold bolts in sequence to 5 Nm (44 lb in).
Final Pass: Tighten the intake manifold bolts in sequence to 10 Nm (89 lb in).