Volvo B 21 - Valve Seat Replacement Procedures

Group 27 R econditioning engine
Cylinder head, cleaning, inspection
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Valve seat , replacement
Operations E1 7-28
Importent: Valve guides snould always be replaced before
replac i ng valve seats. See E12-16.
El?
Cut two notches in ring of old yalye seat
This makes it easierto remove seat. Grind an additional
notch for chisel, taking care not to damage cylinder
head.
EI8
Split yalye seat
Split seat with a cnise!.
Be careful not to damage cylinde r head.
EI9
Tap out yalve seat
U se a long drift as illustrated.
E20
Check yalye seat recess
If damaged, r8am recess to nearest oversize.
E21
Measure diameter
U se an inside micrometer.
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