Remove Cylinder Head; Check For Damage And Warp - Volvo D 20 Service Manual

Group 21 Engine
A, Ol
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D20
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Cylinder head, removal
T i g h l e n i n g s e q u e n c e f o r c y l n d e r h e a d b o i s .
Bolis musl be slackened ln reverse sequence.
D 1 7
Remove cylinder head
lmportantr Slacken bo ts in reverse sequence to tighl-
e n i n g . ( i . e . s t a r t a t 1 2 ( o r 1 4 ) a n d f i n i s h a t 1 - )
L i i i a w a y c y i n d e r h e a d . C h e c k t h a t r e a r g l o w p u g c l e a r s
i n j e c t i o n p u m p b r a c k e l a n d t h a t v a l v e s d o n o t c o n t a c t
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Place cylinder head on
Do not rest cylincler head
wooden blocks
D 1 8
D 1 9
D20
Clean gasket surfaces on
cylinder block
cylinder head and
C h e c k f o r d a m a g e a n d w a r p
U s e a s t r a i g h t e d g e a n d f e e t e r g a u g e .
R e p l a c e c y i n d e r h e a d i f w a r p e x c e e d s :
- l e n g t h w i s e 0 . 5 m m { 0 . 0 2 i n ) .
- c r o s s w r s e 0 . 2 m m ( 0 . 0 0 8 i n ) .
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