Volvo D20 - Page 49

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Group 27 Reconditioning engine
Cylinder head, cleaning - inspection
Check tappets
Place tappets in cylinder head.
Check fit and clearance.
F4
Clearance. new parts ...................... 0.025-0.075 mm
(0.001-0.003 in)
Check valve springs
Inner springs
Length
mm
(in)
33.9
11.334)
28.6
(1.126)
18.3
(0.720)
Quter springs
Length
mm
(in)
40.2 11.583)
32.6 11.283)
22.3 10.8781
Replacing va/ve guides
Operations F6-8
Press out valve guide
F5
Load
N
IIbs)
O
lO)
67-71
(15-17.5)
209-231
(47-52.2)
Load
N
(lbs)
O
lO)
167-185
(38-42)
433-479
(98-108.3)
F6
Use drift 5218. Press from combustion chamber side.
Press in new valve guide
Lubricate valve guide.
Use
drift 5218. Press in from camshaft side.
Fl
Press in guide until flange on guide contacts cylinder
head.ln this position press force must not exceed 1 ton
since flange
may break off.
47