Volvo D20 - Page 32

Group 21 Reconditioning engine
Cleaning, checking
'.~
30
Cylinder bore is stamped on cylinder block (last 3
figures
= honing group).
If cylinders are rebored, new bore must be
stamped on side of block.
Marking Piston
Bore
Ihoning-
Diameter Diameter
group}
mm
;n
mm
;n
Standard
651 76.48 3.0110 76.51
3 .0 122
652 76.49 3.0114 76.52
3.0126
653 76.50 3.0118 76.53 3 .0 130
Qversize 1
676 76.73
3.0209 76.76 3.0220
677 76.74 3.021 l 76.77 3.0224
673 76.75 3.0217 76.78 3.0228
Qversize 2
701 76.98 3.0307 77.01 3.0319
702
76.99 3.031 l
77.02 3.0323
703 77.00
3.0315 77.03 3.0327
Qversize 3
751 77.48
3.0504 77.51 3.0516
752
77.49
3.0508 77.52 3.0520
753
77.50 3.0512 77.53
3.0524
C4
Measure piston diameter
Take measurements at right angles to gudgeon / piston
pin bore, 15 mm (0.6 in) from lower edge of piston.
Diameter must not deviate by more than 0.04 mm
(0.0016 in) from value in table above.
Diameter stamped on top of piston.
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