Replacing Coolant; Fill Coolant; Tighten Cylinder Head Bolts; Check Tightening Of Cylinder Head Bolts - Volvo D 20 Service Manual

Group 21 Engine
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Cylinder head, installing
H 3 7
F i l l c o o l a n t
C a p a c i t y : D 2 0 = 8 . 1 l i t e r s ( 8 . 6 U S q u a r t s )
D 2 4 = 9 . 3 t i r e r s ( 9 . 8 u s q u a f t s ) .
F l u s h c o o l i n g s y s t e m b e f o r e a d d i n g n e w c o o l a n t , s e e
G r o u p 2 6 C o o l i n g S y s t e m .
S e r d c s o o a r d h e d r e r c o n r r o ' r o 1 i . ( . T u r ' r o ' r e n g n a
a n d w a r m ' u p f o r 5 m i n u t e s . A d d c o o l a n t d u r i n g t h i s
t i m e . C o n n e c t h o s e l o c o l d s t a r t d e v i c e . F i l l c o o l a n t t o
m o u t h o f e x p a n s i o n t a n k ( a b o v e m a x ) a n d s c r e w o n
H38
Tighten cylinder head bolts
Wa.m-up engine until oi temperalure is at least 50'c
1122"F1.
Remove vacuum pump with plunger and va ve cover.
M 11 boltsr lorque to 90 Nm (6s ft lbs)
M 12 bolts:an9le'tighien
90'in one movemenl wrlh otrt
stopping. Instal
plrrnp plunger and
Replacing coolant
A l w a y s L r s e t y p e C b l u e - 9 r e e n c o o l a n t . R e m e m b e r t o
r e p l a c e d e c a l ( P / N 1 3 3 1 4 7 3 7 ) o n e x p a n s i o n t a n k i f n e -
Type C blue-green coolant
A l l d i e s e l a n d p e t r o ( g a s o l i n e ) e n g i n e s m a n u f a c t u r e d
s i n c e 1 9 8 2 a r e f i l l e d w i t h t y p e C c o o a n t .
Check-tightening of cylinder head bolts
lmportantr Bolis must be re torqlecl after 600-1,200
m i l e s ( 1 , 0 0 0 2 , 0 0 0 k r n ) . S e e n e x t p a g e .
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