Group 21 Reconditioning engine
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Specifications
Group 21 Engine block
CYLINDER HEAD
Height
New -
111.07
mm (4.373 in)
Max. warp is 0.05 mm over 100 mm.
NOTE!
Do not level a warped cylinder head, replace it.
Cylinder head gasket thickness
1.14-1.50
mm
(0.045-0.059
in)
CYLINDER BLOCK
Cylinder liners
Pistons and liners are matched sets.
Cylinder liners are marked by 1, 2 or 3 cuts in the upper edge of
the liner.
B 27 B 27
Bore,
liners marked 1 (A-marked piston) 88.00-88.01 mm 91.00-91.01 mm
(3.4646-3.4650
in)
(3.5826-3.5830
in)
2 (B-marked piston) 88.01-88.02 mm
91.01-91.02
mm
(3.4650-3.4654 in) (3.5830-3.5835 in)
3 (C-marked piston) 88.02-88.03 mm
91.02-91.03 mm
(3.4654-3.4657 in) (3.5835-3.5838 in)
Liner height above block face
0.16-0.23
mm (0.0063-0.009 in)
Shims for adjustment of liner height:
thickness, blue paint marking 0.070-0.105 mm (0.0027-0.0041 in)
white paint marking
0.085-0.120
mm
(0.0033-0.0047
in)
red paint marking 0.105-0.140 mm (0.0041-0.0055 in)
yellow paint marking 0.130-0.165 mm (0.0051-0.0064 in)
PISTONS
Pistons for B 27
Pistons and liners are matched sets.
Two different manufacturers supply pistons, see next page
for specifications.
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\
Demolin
Mahle
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