Volvo Penta TD520GE Workshop Manual page 58

Assembly, complete engine
68
Cylinder head gasket
80. Determine the thickness of the cylinder head gas-
ket. Put spacers (3) and measuring bar 999 8678
(1) on the sealing face of the engine block and set
the dial gauge (2) to "0".
81. Put the dial gauge on the piston at the measuring
points and determine the greatest piston height.
NOTE! You need to measure all pistons at T.D.C.
NOTE! Take note of the measuring points, since the
surface of the piston is spherical. Use for example a
steel ruler to find the highest point (in the direction of
the gudgeon pin).
82. Compare the largest values with the table and de-
termine a suitable cylinder head gasket.
Piston height
0.28– <0.53 mm
(0.011– <0.021")
0.54– <0.63 mm
(0.021– <0.025")
0.64–0.75 mm
(0.025–0.029")
Group 21
Marking on cylinder head
gasket
1 hole
2 holes
3 holes