Cylinder Head Assembly

Cylinder Head Replacement - Right Side/Left Side





Cylinder Head M8 Bolts - in Sequence 30 N.m (22 lb ft)
Cylinder Head M11 Bolts
First Pass in Sequence 30 N.m (22 lb ft)
Second Pass in Sequence 90 degrees
Final Pass in Sequence 70 degrees

Camshaft Position (CMP) Sensor Bolt 12 N.m (106 lb in)
Camshaft Retainer Bolts - Hex Head Bolts 25 N.m (18 lb ft)
Camshaft Retainer Bolts - TORX(R) Head Bolts 15 N.m (11 lb ft)
Camshaft Sprocket Bolt - Second Design 1-Bolt Sprocket
First Pass 90 N.m (66 lb ft)
Final Pass 40 degrees
Camshaft Sprocket Bolts - First Design 3-Bolt Sprocket 25 N.m (18 lb ft)
Cylinder Head Coolant Plug 20 N.m (15 lb ft)





Intake Manifold Bolts
First Pass in Sequence 5 N.m (44 lb in)
Final Pass in Sequence 10 N.m (89 lb in)

Exhaust Manifold Bolt (LS4)
Install a NEW exhaust manifold gasket, the exhaust manifold and bolts.

First Pass 15 N.m (11 lb ft).
Tighten the bolts beginning with the center 2 bolts. Alternate from side to side, and work toward the outside.

Final Pass 20 N.m (15 lb ft).
Tighten the bolts beginning with the center 2 bolts. Alternate from side to side, and work toward the outside.

Exhaust Manifold Heat Shield Bolts 9 N.m (80 lb in)
Exhaust Manifold Studs 20 N.m (15 lb ft)

Block
Camshaft Bearing Bore 1 and 5 Diameter 59.58-59.63 mm (2.345-2.347 in)
Camshaft Bearing Bore 2 and 4 Diameter 59.08-59.13 mm (2.325-2.327 in)
Camshaft Bearing Bore 3 Diameter 58.58-58.63 mm (2.306-2.308 in)
Camshaft
Camshaft End Play 0.025-0.305 mm (0.001-0.012 in)
Camshaft Journal Diameter 54.99-55.04 mm (2.164-2.166 in)
Camshaft Journal Out-of-Round 0.025 mm (0.001 in)
Camshaft Lobe Lift - Intake - Non Active Fuel Management Cylinders 7.2 mm (0.283 in)
Camshaft Lobe Lift - Intake - Active Fuel Management Cylinders 7.33 mm (0.289 in)
Camshaft Lobe Lift - Exhaust - Non Active Fuel Management Cylinders 7.2 mm (0.283 in)
Camshaft Lobe Lift - Exhaust - Active Fuel Management Cylinders 7.33 mm (0.289 in)
Camshaft Runout - Measured at the Intermediate Journals 0.05 mm (0.002 in)
Cylinder Head
Cylinder Head Height/Thickness - Measured from the Cylinder Head Deck to the Valve Rocker Arm Cover Seal Surface 120.2 mm (4.732 in)
Surface Flatness - Block Deck - Measured Within a 152.4 mm (6.0 in) Area 0.08 mm (0.003 in)
Surface Flatness - Block Deck - Measuring the Overall Length of the Cylinder Head 0.1 mm (0.004 in)
Surface Flatness - Exhaust Manifold Deck 0.13 mm (0.005 in)
Surface Flatness - Intake Manifold Deck 0.08 mm (0.0031 in)
Valve Guide Installed Height - Measured from the Spring Seat Surface to the Top of the Guide 17.32 mm (0.682 in)
Intake Manifold
Surface Flatness - Measured at Gasket Sealing Surfaces and Measured Within a 200 mm (7.87 in) Area that Includes 2 Runner Port Openings 0.3 mm (0.118 in)