Fuel Rail Inspection and Installation
1. Remove the fuel injector retaining clip (6), and remove the
fuel injectors (4).
2. Inspect the fuel injectors (4) and the fuel injector O-rings (3,
5), replace if necessary.
3. Install the fuel injectors (4) into the fuel rail (2).
4. Install the fuel injector retaining clips (6).
5. Install the fuel rail assembly (2) and secure to the fuel rail
bracket with the fuel rail bracket bolts (1).
Tighten
Tighten the fuel rail to fuel rail bracket bolts to 12 N•m (106 lb in)

Cylinder Head Torque Sequence
1. With the fuel rail bracket and fuel rail installed, tighten all
cylinder head bolts.
Tighten
Tighten the cylinder head bolts in sequence to 135 N•m (100 lb ft).
汽缸盖安装顺序
1. 随着燃料系统导轨和燃料系统导轨托架的安装，预紧所有的缸盖栓拧紧：
按顺序拧紧所有的缸头螺栓。力矩达到135N.m(100 lb ft)

Valve Lifter Installation
1. Coat the bottom of the valve lifters with prelube, GM P/N
1052365 or equivalent.
2. If reusing the valve lifters, install in their original location.
3. Install the valve lifters.
气门挺杆安装
1. 用机油涂抹气门挺杆外部。
2. 假如是重复使用气门挺杆，安装在原来的位置
3. 安装气门挺杆

3. Adjust the valve rocker arm nuts as follows:
3.1. Turn the crankshaft until the mark on the crankshaft
pulley lines up with “0” on the timing tab and number
1 cylinder is at top dead center.
3.2. Place fingers on the number 1 valves as the mark
approaches “0.” If the valves move as the mark
approaches “0,” the engine is on number 4 top dead
center and should be rotated one more revolution in
order to reach number 1 top dead center.
3.3. With the engine at number 1 top dead center, adjust
the following valves:
– The exhaust valves 1,3
– The intake valves 1,2,4
3.4. Adjust the correct valves as follows:
3.4.1. Back off the valve rocker arm nut until the
lash is felt in the valve pushrod.

3.调节气门摇臂螺母如下。
3.1转动曲轴，直到飞松刻度线与机体的零刻度线对齐。使发动机第一缸处于压缩行程上止点。
3.2靠近飞轮一端为第一缸，假如转动飞轮，使机体零刻度线与飞轮刻度线对齐，但是四缸处于压缩行程上止点，应该再次装懂，使一缸处于压缩行程上止点。
3.3发动机第一缸处于压缩行程上止点时，调整气门如下
----1缸和3缸排气门
----1缸和2缸进气门
3.4调整正确的气门如下
3.4.1后退气门摇臂螺母，直到感觉到推杆可以自由移动。
3.4.2预紧气门摇臂螺母直到移动被删除

3.4.3. Zero lash can be felt by moving the valve
pushrod up and down between your thumb
and forefinger until there is no more
movement.
3.4.4. When all the free play is gone, tighten the
valve rocker arm nut 1 additional turn (360
degrees).
3.5. Turn the crankshaft 1 revolution until the mark on the
crankshaft pulley lines up with “0” on the timing tab.
This is number 4 top dead center.
3.6. With the engine at number 4 top dead center, adjust
the following valves:
– The exhaust valves 2,4
– The intake valves 3
3.6.1. Back off the valve rocker arm nut until the
lash is felt in the valve pushrod.
3.6.2. Tighten the valve rocker arm nut until all the
lash is removed.
3.6.3. Zero lash can be felt by moving the valve
pushrod up and down between your thumb
and forefinger until there is no more
movement.
3.6.4. When all the free play is gone, tighten the
valve rocker arm nut 1 additional turn (360
degrees).

3.4.3用你的拇指和食指来感觉，气门推杆上下刚好都不可以移动。
3.4.4当自由移动消失时再次预紧气门摇臂螺母3600   
3.5转动到曲轴直到飞轮刻度线与机体零刻度线对齐，使发动机第四缸处于压缩行程上止点。
3.6当发动机第四缸处于压缩行程上止点，调整以下气门
----2缸和4缸排气门
----3缸和4缸进气门
3.6.1送掉气门摇臂螺母，直到感觉到推杆可以自由移动
3.6.2预紧气门摇臂螺母直到推杆不可以移动
3.6.3用你的拇指和食指来感觉气门推杆上下刚好都不可以移动
3.6.4当移动消失时，再次预紧气门摇臂螺母3600

Pushrod Cover Installation
1. Install the pushrod cover gasket.
2. Install the pushrod cover.
3. Install the pushrod cover bolts.
Tighten
Tighten the pushrod bolts to 4.5 N•m (40 lb in).