Volvo B 21 - New Valve Seat Measurement and Installation

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D +0.17mm (0.0067 in)
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5029
5220
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Group 21 Reconditioning engine
Cylinder head , cleaning, inspection
E22
Measuring new valve s8at
Size of new valve seat is not marked bu! must be mea-
sured. Two oversizes are available.
Valve
seat insert should be 0.17 mm (0.0067 in) larger
than recess in cylinder head.
E23
If less than 0.17 mm (0.0067 in):
Recut valve seat to oversiZ8. Usa a valve cutter e.g. Mira
P/N 998 6045·5 and follow manufacturers instructions .
Valva seat diameter
Standard .................... mm
(in)
Oversize l ...... . .. . ......... mm
Oversize 2 ........... .
Heat cylinder head
Heat to 100 o C (212
C
F) .
(in)
.... mm
(in)
Fil new seat insert on drift
Drih 5029 - inlet valvas
Drih 5220 - axhaust valvas.
Inlet Exhaust
46 .00 38.00
(1.8124) (1.4972)
46.25 3825
(1.8223) (1.5071)
46 . 50 38.50
(1 . 8321) (1.5169)
E24
E25
E26
Cool seat insert to -7rrC (-94°F)
Use carbon dioxide.
Wear protective groves for safety.
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