Generac Power Systems 940-2 Valve Components Installation Continued, Adjusting Valve Clearance

Section 2.2

VALVE TRAIN

VALVE COMPONENTS INSTALLATION

(CONTINUED)

3.Install the valve spring washers, valve springs and valve spring retainers over the valve guides.

a.Hold the valve with your fingers and use your thumbs to compress the spring.

b.When the spring is compressed sufficiently, slide the spring retainer small opening over the valve stem.

c.With the smaller retainer opening around the valve stem, release the spring.

Figure 12. Installing Valve Spring Washers

4.After both valves have been retained in the cylinder head, posi- tion a new head gasket and install the cylinder head.

NOTE: The head gasket is coated with a special substance for beer sealing. The gasket must be free of nicks, scratches and other defects for bet- ter sealing.

5.Install cylinder head bolts. Tighten the head bolts in the sequence shown to the recommended tightness.

TIGHTENING TORQUE

CYLINDER HEAD

GV-220: 29 foot-pounds

6.Place the push rod guide plate into position on the head. Then, install the rocker arm and the pivot ball stud. The rocker arm jam nut must be on far enough to hold the guide plate In posi- tion.

NOTE: Do NOT adjust valve clearance at this time. This will be done later.

Figure 14. Install Rocker Arm & Pivot Ball stud

7.install the push rod with either end against the tappet.

a.Place the push rod between the guide plate tabs.

b.Place the rocker arm socket onto end of push rod.

c.Alignment is correct when push rod ball rests In the rocker arm socket.

NOTE: The pivot ball stud will be tightened when the valve clearance Is adjusted. After valve clear- ance has been adjusted, the rocker arm cover will be Installed.

Figure 15. Push Rod Installation

ADJUSTING VALVE CLEARANCE

When adjusting valve clearance, the engine should be at room temperature and the piston should be at top dead center (TDC) of Its compression stroke (both valves closed).

Figure 13. Head Bolts Tightening Sequence

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