Volvo D20 - Group 21 Engine Block

Specifications
Group 21 Engine block
CYLINDER HEAD
0.5 mm = 0.020 in
Diagonally = max 0.5 mm :lO 0.020 in
Cylinder head may not be machined. It must be
replaced if warp exceeds maximum .
Cylinder head gaskat
0.2 mm "" 0.0 08 in
I,
128 141
Crosswise = max 0 .2 mm = 0.008 in
Thrae alternative gaskets are u se d depending on height of piston above cylinder block.
Marked by notch
~
, ,. ".
4
Height of piston above
Gasket
cylinder block
notehes thickness
mm in
mm in
0.67-0.80
0.026-0.031 1
L'
0.055
0.81-0.90 0.032-0.035
2 1.5
0.059
0.91-1.02 0.036-0.040
3 1.6 0.063
Notel Piston height in same engine must not extend
over more than two classes. Pis ton height is
measured
at front and back of piston (along
gudgeon / piston pin).
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