Kohler KT19 series II User Manual

SECTION 7
DISASSEMBLY
Overheating: An exhaust valve subject to overheating
will have a dark discoloration in the area above the
valve guide. Worn guides and faulty valve springs may
cause this condition. Also check for clogged air intake,
blocked fins, and lean fuel mixture when this condition
is noted.
L~
-~;- \
Min. \
Margin
Face
Stem
Over
Cut
Carbon Cut: Excessive buildup of deposits in the
combustion chamber may result in valve damage be-
cause deposits can become hard enough to cut the valve.
Cleaning of the cylinder head at proper intervals could
prevent such damage.
Valve Guide
Depth
Figure 7-8. Valve Details
Valve Guides
Guides must be replaced if worn sufficiently to
allow valve stem guide clearance to exceed limits
stated in Section 1 "Specifications, Wear Toler-
ances, Torques and Special Tools."
To remove, press guide down into valve chamber
and carefully break protruding end until guide is
completely removed. Be careful not to damage the
cylinder barrel when removing the old guide.
Clean the valve guide bores thoroughly. Press
46
replacement guides into cylinder barrel to depth
specified, then ream to proper I. D. (see Figure 7-8).
Valve Seat Inserts
Intake valve seats are machined into the cylinder
barrel on most KT models, however, certain ap-
plications may call for hard alloy intake valve seat
inserts. The exhaust valve seats on these models
are always replaceable alloy inserts. If the seats
become badly pitted, cracked or distorted the in-
serts must be replaced.

Kohler KT19 series II Specifications

General

Brand	Kohler
Model	KT19 series II
Category	Engine
Language	English