Installation Procedure
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
When reusing the valve train components, always install the components to the original location and position.
Valve lash is net build, no valve adjustment is required.
- Lubricate the valve rocker arms and pushrods with clean engine oil.
- Lubricate the flange of the valve rocker arm bolts with clean engine oil.
Lubricate the flange or washer surface of the bolt that will contact the valve rocker arm.
- Install the valve rocker arm pivot support.
- Install the pushrods.
- Install the rocker arms and bolts.
- Rotate the crankshaft until the number one piston is at top dead center (TDC) of the compression stroke.
In this position, cylinder number one rocker arms will be off lobe lift, and the crankshaft sprocket key will be at the 1:30 position.
The engine firing order is 1, 8, 7, 2, 6, 5, 4, 3.
Cylinders 1, 3, 5 and 7 are the left bank.
Cylinder 2, 4, 6 and 8 are the right bank.
- With the engine in the number one firing position, tighten the following valve rocker arm bolts:
Tighten:
- Tighten the cylinders 1, 2, 7 and 8 exhaust valve rocker arm bolts to 30 N.m (22 lb ft).
- Tighten the cylinders 1, 3, 4 and 5 intake valve rocker arm bolts to 30 N.m (22 lb ft).
- Rotate the crankshaft 360 degrees.
- Tighten the following valve rocker arm bolts:
Tighten:
- Tighten the cylinders 3, 4, 5 and 6 exhaust valve rocker arm bolts to 30 N.m (22 lb ft).
- Tighten the cylinders 2, 6, 7 and 8 intake valve rocker arm bolts to 30 N.m (22 lb ft).
- Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement - Left Side or Valve Rocker Arm Cover Replacement - Right Side .
IMPORTANT:
Make sure that the pushrods seat properly to the valve lifter sockets.
IMPORTANT:
Make sure that the pushrods seat properly to the ends of the rocker arms. DO NOT tighten the rocker arm bolts at this time.
NOTE:
Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.