Generac Power Systems GTV99O Service Manual page 33

SECTION 5: CYLINOER HEAD AND VALVES
7. Set guide plate in place and loosely install rocker arm
assembliet (ballstud, rocler arm and Jam nu0.
8. Repeat Step 7 for other head.
INSTAI.L CYIINDER HEAD
1- Installcylinder head with newgasket-
2. Torque head bolts in sequence shown to 29.9 Nm (22 ft.
lbs.) (Figure 5-16).
3. In5ert push rods into recess in tappets.
Fbute &16.
ADJUST VATVE CI.EARANCE
1.Set No. 1 cylinder atTDC, comprcssion stroke.
a. Adjust rocker arms and check clearance (Figure 5-17).
Valve Cleaance (cold) lN and EX 0.0762 mm (.003').
b.Torquejam
nut and ballstud to 19 Nm (14ft. lbs.).
2. Repeatfor No.2 cylinder.
3.Inslallvalve covers with new gaskets, Figure 5-18.
a. Torque nuts to 6.8 Nm (5 ft. lbs.).
REASSEMBIE
1. lnstall cylinderwtappers.
a. Toque M5 scre! 6 to 2.8 Nm (25 in. lbs).
b.Torque M6 screws to 4.5 Nal(40 in. lbs).
2. Install spark plugs.
a. Torque to 2l Nm (15.5 ft.lbs.).
3. Install exhaust manifold.
a. Torque scews to 32.5 Nm (24 ft. lbs.).
4. Install blower housing.
a.Torque screws to 4.5 Nm (40 in. lbt.
5. Install intake manifold with new gaskets.
a.Torque screws ro 9 Nm (14 ft. lbs.).
b.Assemble governor link to carburetor
Figwe ,l8.lntall Valve Coverc
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TORQUE SEQUENCE FOF HEADS:
A.B.C-D-E-F
Figurc 5-17, Adjun Valve Cleannces
5 - 5