Volvo 164 Owner's Manual - page 48
25 Changing the coolant
The coolant retains its properties for ap-
prox. 2 years when it should be changed.
A suitable time to do this would be in the
autumn to preclude any damage by frost
during the coming winter. To drain the
cooling system, unscrew the drain plug
l ocated on the right hand side of the en-
gine and disconnect the hose connected
to the bottom of the radiator. The expan-
sion tank is emptied by removing it from
i ts brackets and lifting it to a sufficient
height so that the coolant can flow into the
radiator.
Before filling with new coolant, flush the
entire system with clean water.
The cooling system is filled with coolant
through the filler opening on top of the ra-
diator. When this is being done, the heater
control should be set to max. heat to en-
sure that the entire system is filled.
Fill the radiator to the top and fit on the cap.
Then fill the expansion tank to the "Max"
l evel or slightly above this.
Run the engine warm, switch off the igni-
tion and allow the engine to cool. Check
that the radiator is full and that the coolant
i n the expansion tank is at "Max". I f ne-
cessary, top up the system.
26 Checking the spark plugs
The spark plugs should be removed and
checked every 10000 km (6000 miles).
Adjust the electrode gap to 0.7-0.8 mm
(0.028-0.032").
Tightening should preferably be done with
a torque wrench. The spark plugs should
be tightened to a torque of 34-39 Nm (25
29 lbft). When fitting new plugs, be sure
to fit the right type.
B 30 E Bosch W 225 T 35 or corresponding.
B 30 F Bosch W 200 T 35 or corresponding.
27
28 Ignition system
The distributor contact breaker gap and the
engine ignition timing should be checked
every 10 000 km (6000 miles).
All adjusting work should be done by a
workshop with the proper equipment. The
distributor is one of the most sensitive units
i n the engine and careless handling can
lead to decreased engine output and high
fuel consumption or even serious damage
to the engine.
SERVICING
47