Onan MicroLite 4000 Series User Manual

10-3
ROCKER ARMS, PUSH RODS AND
CYLINDER HEAD
Remove the cylinder head for cleaning when poor
engine performance is noticed or to inspect the
valves.
1. Remove the rocker arm mounting nuts. Re-
move the rocker arms and push rods (Figure
10-4).
2. Remove the spark plug.
3. Remove the cylinder head mounting bolts and
pull off the cylinder head.
CAUTION
Warping can occur if the head
is removed while it is hot. Wait until the en-
gine has cooled before removing the cylin-
der head.
4. Remove all carbon deposits from the cylinder
head. Handle the cylinder head carefully be-
cause it can be easily damaged.
5. Clean the cylinder block and cylinder head
thoroughly in the head gasket mating area.
Install a new head gasket on the block.
6. Place the head in position and follow the head
torque tightening sequence shown in Figure
10-5. Start out tightening all bolts to 11 lb-ft (15
Nm), then tighten to the specified torque (see
Section
4. Torque Specifications ).
CT1119-2s
ADJUSTING
NUT
LOCKING
NUT
ROCKER
ARM
PUSH
RODS
BOLT
FIGURE 10-4. ROCKER ARM AND PUSH ROD
REMOVAL
C1131-2s
1
24
35
6
FIGURE 10-5. CYLINDER HEAD TIGHTENING
SEQUENCE

Onan MicroLite 4000 Series Specifications

General

Brand	Onan
Model	MicroLite 4000 Series
Category	Portable Generator
Language	English