Adjusting The Valves 230, 250, Aq131, Aq151 - Volvo Penta 230 Workshop Manual

Adjusting the valves 230, 250,
AQ131, AQ151
134. Measure the valve clearance for the number 1
cylinder, using a feeler gauge.
Clearance, cold engine: 0.35–0.40 mm (0.01378–0.01575")
Clearance, hot engine: 0.40–0.45 mm (0.01575–0.01772")
The same clearance for intake as for exhaust valves.
NOTE! Should the clearance when checking be between
the values given below, adjustment is not necessary.
Cold engine: 0.30–0.40 mm (0.0118–0.01575")
Hot engine: 0.35–0.45 mm (0.01378–0.01772")
135. When necessary the adjustment washers are to
be replaced as follows: Turn the valve tappet so that
the grooves are aligned 90° to the length of the cam-
shaft.
136. Install special tool part no 9995022-2 and press
down the valve tappets. Tighten the tool spindle and
adjust until the groove of the valve lifter is above the
edge and thus accessible with a pair of pliers.
137. Use special tool part no 9995026-3 (pair of pli-
ers) to lift out the washer.
138. Measure the thickness of the washer with a mi-
crometer. Calculate the thickness of the washer,
giving the correct clearance.
Example: The measured clearance is: 0.30 mm
(0.0118"), the correct clearance is 0.40 mm
(0.01575"), thus a difference of -0.10 mm (0.00394").
Measured thickness of existing washer: 3.80 mm
(0.1496").
The correct thickness on a new washer: 3.80–0.10 =
3.70 mm (0.1496–0.003294" = 0.14567").
139. The washers are available in thicknesses be-
tween 3.30 (0.12992") and 4.5 mm (0.17717") at in-
tervals of 0.05 mm (0.00197"). Always use new
washers only. See page 60.
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