Kohler KDW 1603 - Valve Spring - Check; Valve Spring - Check Under Load; Valve Material; Valve Guides And Cylinder Head

6
24
23
22
21
A 6,985÷7,00mm
B 35,30÷35,50mm
C 40,30÷40,50mm
a 45°30'÷45°45'
a
1
60°30'÷60°45'
D 38,00
E
12,020÷12,038
F 12,048÷12,058
- 41 - - 41 -
Disassembly / Reassembly
Valve spring - Check
Checktheoverallstateofthevalvesprings.
Replaceifdamagedoriftheyhavelosttheiroriginalelasticity.
Firstofall,useagaugetocheckthatthefreelengthmatchesthe
measurementsgivenbelow.
A = 52 mm
Valve spring - check under load
Verify(withadynamometer)thatthelengthunderloadmatches
thenominallength.
Ifitisshorterthanthatquotedingure22,replacethespring.
Valve material
Dimensions
Ref.
Valve guides and cylinder head
Intakeandexhaustvalveguidesarebothmadeofgraycastiron
withpearliticandphosphoricmatirx.
Valve guides with outside diameter F increased by 0.5 mm
are available; in such case valve guide bore E should also be
increasedby0.5.
Dimensions (mm)
Ref.
Workshop Manual KDW 1603_2204_2204/T _ cod. ED0053029180 - 1° ed_rev. 00