Perkins Phaser Series - Page 45

CYLINDER HEAD ASSEMBLY 12
Maximum permissible distortion of cylinder
head (A)
Four cylinder engines
A1 . . . . 0,08 mm (0.003 in)
A2 . . . . 0,15 mm (0.006 in)
A3 . . . . 0,15 mm (0.006 in)
Six cylinder engines
A1 . . . . 0,13 mm (0.005 in)
A2 . . . . 0,25 mm (0.010 in)
A3 . . . . 0,25 mm (0.010 in)
Dimensions of recesses for valve seat inserts
(B)
Inlet
B1 . . . . 7,19/7,32 mm (0.283/0.288 in)
B2 . . . . 51,22/51,24 mm (2.0165/2.0175 in)
B3 . . . . Radius 0,38 mm (0.015 in) maximum
Exhaust
B1 . . . . 9,52/9,65 mm (0.375/0.380 in)
B2 . . . . 42,62/42,65 mm (1.6780/1.6790 in)
B3 . . . . Radius 0,38 mm (0.015 in) maximum
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Perkins Phaser/1000 Series, April 1995 12A.25