Volvo D 20 Service Manual page 23

Gtoup 21 Engine
Erample:
lfclearance is 0.20 mm and specified clearance is 0.25
mm then replace existing disc with one which is 0.05
Always use new discs,
Discthicknesses
6vailable = 3.0G-4.25 mm 6t inte als
of 0.05 mm.
Position new disc and
Disc should be lubricated
B8
remove pliers
a n d i n s t a l l e d w i t h s i z e m a r k s
Valve adjustment
8 1 0
B9
Check/adjust valve clearance Ior remaining cylin-
derc
Checuadjust in following order:
D 20. 1-2-4,5-3
D 24, 1-5-3-6-2-4
lmportantl Do not forget to rotate crankshafl 1/4 turn
before checUadiusting
valve clearance.
Recheck valve clearance for all cylinders
R o t a t e e n g i n e s e v e r a l t u r n s b e f o r e r e c h e c k i n g .
8 1 1
lnstall valve covet
Use new gaskets if required.
T w o i y p e s o f p i n s t o d s a r e a v a i l a b l e s e e f i g . L a r e t y p e s
have a spacer, and hole in gasket is la.ger to prevent
damage to gaskel by ovenightening,
L€te and eary type parts must not be imerchanged.
iY:'I,l d.!
21