Kohler Aegis LH685, Руководство по обслуживанию

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11.12
Section 11
Reassembly
#2 Cylinder Head
#1 Cylinder Head
3 1
4
2
1
3
2
4
Figure 11-36. Cylinder Head Torque Sequence.
7. Repeat the installation procedure for the #2 side
cylinder head.
Install Push Rods and Rocker Arms
1. Note the mark or tag identifying the push rod as
either intake or exhaust for cylinder #1. Lightly
apply engine oil or grease to the ends of push rods
and install. Make sure that each push rod ball
seats in its respective hydraulic lifter socket.
NOTE: Push rods must always be installed in the
same position as before disassembly.
Figure 11-37. Installing Push Rods.
2. Apply grease to the contacting surfaces of the
rocker arms and rocker arm pivots. Install the
rocker arms and rocker arm pivots on the cylinder
head.
3. Install two new hex. flange rocker arm screws with
Dri-Loc ® thread locking compound on the threads.
Torque the screws to 11.3 N·m (100 in. lb.). When
tightening, use a steady motion, without
interruption, until the proper torque is achieved.
The frictional heat from the engaging threads may
otherwise cause the locking compound to set
prematurely. If new screws are not available, apply
Loctite
® No. 242 to the bottom four or five threads.
Then install and torque the screws to 11.3 N·m
(100 in. lb.). See Figure 11-38.
Figure 11-38. Installing and Torquing Rocker Arm
Mounting Screws.
4. Use a spanner wrench or rocker arm lifting tool
(see Section 2) to lift the rocker arms and position
the push rods underneath.
5. Rotate the crankshaft so the piston in cylinder #2
is at top dead center on the compression stroke,
and repeat the steps for the remaining cylinder. Do
not interchange parts from one cylinder head with
parts from the other cylinder head.
6. Rotate the crankshaft to check for free operation of
the valve train. Check the clearance between valve
spring coils at full lift. The minimum allowable
clearance is 0.25 mm (0.010 in).
Install Valve Covers
1. Make sure the sealing surfaces of cylinder heads
and valve covers are clean and free of all old
gasket material.
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