Volvo B 21 - Cylinder Head Cleaning and Inspection; Cylinder Head Cleaning and Distortion Check

Group 21 Re c onditioning eng ine
Cylinder head , e/eaning, inspection
Cylinder hlead, cleaning, inspection
maxO . 5mm r
(0.02 in)
'-----
max 0.25 mm
(0. 01 In)
119&!\2
IlD 111
Sodium
1315019
Clean cylinder head and gasket face
Check
cy li nd er head for distortion
Use a steal fuler and feeler gauge.
E7
EB
Distortion mu st not exceed 0.5 mm (0.02 in) loogitudinally
and 0.25 mm (O . Ot in) across cylinder head.
Im po rten t : If distortion is g reate r than 1.0 mm (0 .04 ini
longitudi
naUy or 0.5 mm 10 .02 ini cr osswise cylinder head
mus t be replac ed .
Cylinder head height, new .
m
in (aher machining) .
.146.1 mm (5.7563 ini
.. 14S.6 mm (S .7366 Ini
Cleanlinspect valves and valve seats
Clean valve saats wi th a cutta r.
E9
Remove carbon from combustion chambers and
valves.
n valve seats are fracturad or show signs of excessive
wear thay
must be replaced.
Claan and check spark plug threads for damage.
Tu rboc har ged engin .. have . odium-filfed exhaul t vetv ...
Scra pped vet vei mu st not be mixed with ordinary scrap
ir on be f or e f ir l t removing th e sodium .
See Inl tru ctl on l on nut pa ge .
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