Volvo Penta 230, Workshop Manual

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112. Check the valve springs in a spring tester.
Length, unloaded ............................... 45 mm (1.77")
loaded 305±20N (67.2±4.48 lbf.) ....... 38 mm (1.50")
loaded 765±40N (170±8.96 lbf.) ........ 27 mm (1.06")
113. Check the valve tappets for scratches and
other visible damage.
114. Check that the valves and valve seats are
lapped perfectly by coating the chamfer of the valve
discs with marking dye and then rotating them with
light pressure against the valve seats. If the marking
dye is not evenly distributed on the whole chamfered
surface of the valve seat (the valve does not seat)
the valve must be reground and checked until a
completely satisfactory result has been obtained.
115. Check that the clearance of the adjustment
washer in the valve tappet is not too big. If there are
wear marks on the flat surface, it should be re-
placed. The clearance between the adjustment
washer and the valve tappet should be 0.009–0.068
mm (0.000354–0.00268")
116. Place the valve tappets in the cylinder head
and check that the clearance is not too big or that
they seize.
NOTE! Do not mix the tappets. Put them in the
same position as prior to the check. Clearance:
valve tappet – cylinder head: 0.030–0.075 mm
(0.001118–0.002953")