Install Valve Covers
Torque Sequence
24
1
3
NOTE: Do not scrape old RTV sealant (if used) off
sealing surface of cylinder head as this could
cause damage and result in leaks. Use of gasket
remover solvent (paint remover) is
recommended.
Three valve cover designs have been used. First type
used a gasket and RTV sealant between cover and
sealing surface of cylinder head. Second type had a
black O-ring installed in a groove on underside of cover
and may have metal spacers in bolt holes. Latest design
uses a yellow or brown O-ring, with bolt hole spacers
molded in place. Tightening torque differs between
gasket and O-ring style covers. Kits are available for
converting to latest O-ring type covers. Differences are
pointed out in following installation steps.
1. If using gasket or sealant type cover, prepare sealing
surfaces of cylinder head and cover, refer to Tools
and Aids for approved sealants. Always use fresh
sealant. Using outdated sealant could result in
leakage. With O-ring type covers, make sure sealing
surfaces are clean.
2. Make sure there are no nicks or burrs on sealing
surfaces.
3. For covers requiring RTV sealant, apply a 1.5 mm
(1/16 in.) bead to sealing surface of both cylinder
heads, install a new cover gasket on each, then
apply a second bead of sealant on top surface of
gaskets. For O-ring type covers, install a new O-ring
in groove of each cover. Do not use gaskets or RTV
sealant.
4. Position covers on cylinder heads. Locate cover with
oil separator hole on cylinder 1. If loose spacers
were used, insert a spacer in each screw hole.
Install screws in each cover and nger tighten.
5. Torque valve cover fasteners to proper specication
using sequence shown, unless screws also attach
heavy-duty air cleaner main support bracket or other
components. Installation and torquing of screws will
be performed after these parts are installed.
Torque Specications-Covers
Gasket/RTV 3.4 N·m (30 in. lb.)
Black O-ring
w/shoulder screws
w/screws and spacers
5.6 N·m (50 in. lb.)
9.9 N·m (88 in. lb.)
Yellow or Brown O-ring
w/integral spacers 6.2 N·m (55 in. lb.)
Install Carburetor
WARNING
Explosive Fuel can cause res and severe
burns.
Do not ll fuel tank while engine is hot or
running.
Gasoline is extremely ammable and its vapors can
explode if ignited. Store gasoline only in approved
containers, in well ventilated, unoccupied buildings,
away from sparks or ames. Spilled fuel could ignite
if it comes in contact with hot parts or sparks from
ignition. Never use gasoline as a cleaning agent.
1. Install a new carburetor gasket. Make sure all holes
align and are open.
2. Install carburetor, throttle linkage, choke linkage, and
governor lever as an assembly. If a plastic intake
manifold is used and/or carburetor is equipped with
a fuel solenoid, reconnect ground and main leads.
Reassembly
84
24 690 07 Rev. HKohlerEngines.com
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