On a craftsman mower 27hp with kolher engine, looking for part number for valve cover gasket...
Parts list quotes number 17 but in list there is no such part. Can one use liquid gasket?
The following excerpt from the service manual explains the different valve cover gasket options. I've ordered these before (direct from kohler authorized service center), but as you, I also see none of the typical parts sites list the 3 choices. If the ones you have had RTV and no O rings then you use RTV, otherwise you'll need to contact Kohler or a local Kohler authorized service center.
From the service manual;
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 Using outdated sealant could result in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. Locate cover with oil fill neck on same side as
removed and install lifting strap in original position.
With O-ring type covers, position cover on cylinder
head. If loose spacers were used, insert a spacer in
each screw hole. On both types, install four screws
in each cover and finger tighten.
5. Torque valve cover fasteners to proper specification
using sequence shown.
Reassembly
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