Volvo PV 544 Instruction Book page 22

Check the cooling water level
The engine cooling water level should be checked each time the fuel tank is filled.
Water is added through the filler opening at the top of the radiator. In order to
avoid deposits in the cooling system, only clean water should be used (not water
containing chalk or iron), together with some rust-preventive additive. Do not use
rust-preventive agents based on mineral oil since these can damage the rubber
hoses in the cooling system. Be careful when you unscrew the radiator cap. There
are two positions on the cap when loosening it, one to decrease pressure in the
system and the second to remove the cap itself.
Never add cold water to a hot engine.
"The sudden change in temperature can
cause cracks in the engine.
Clean the cooling system
If the cooling system is to function in an
effective manner, all the channels
in the engine and radiator must be free
from deposits and impurities. The
deposits that build up consist of the salts
which are always present in normal
water.
Cleaning can be conveniently carried out
in connection with filling or draining
of anti-freeze in the fall and spring, (see page 52).
21 Check the spark plugs
The spark plugs should be checked in a Volvo
workshop after every 5000 km - (3 000 miles).
The plugs should be cleaned by using a brush
or a sand-blaster and should then be blown
well clean with compressed air. The electrode
gap can be checked by using a wire gauge with
a diameter of 0.7— 0.8 mm (0.028-0.032").
After the spark plugs have been cleaned and
adjusted they should be thoroughly tested.
40
Replace the spark plugs
When the electrodes have been burnt down about 50 %, all the spark plugs should
be replaced. This corresponds to a driving stretch of about 20 000 km (12 500
miles). This replacement should preferably be carried out at a Volvo workshop
where the spark plugs are tightened with a torque wrench to about 3.5 kgm (25
Ib.ft.). When fitting new spark plugs, be sure that you fit the right type (see page
55). Consult a Volvo workshop if you consider fitting another type of plug.
ff3 Ignition system
1 24 The distributor contact breaker gap and the engine ignition timing setting
should be checked in a Volvo workshop after every 5000 km (3000 miles).
All adjusting work should be done by the workshop which has the necessary
equipment for this purpose. The distributor is one of the most sensitive units
in the engine and careless handling can lead to decreased engine output
and high fuel consumption or even serious damage to the engine.
25 Carburetor
The carburetor float chamber should be removed and cleaned after every 5000 km
(3000 miles). After every 20000 km (12500 miles), the vehicle should be taken to
a Volvo workshop for the carburetor to be thoroughly cleaned and checked.
Acceleration pump (B 16 A)
The carburetor is fitted with an accel-
eration pump and the length of the pump
stroke is determined by a cam washer
which can be ad justed for short or long
strokes by lifting the washer and turning
it half a turn. The best acceleration
performance is obtained when the arm is
towards the lower cam.
however, also result in increased fuel
consumption.
Gasoline
The fuel used should be gasoline with an octane value of at least 83* for B 16 A and
93* for B 16 B. If gasoline with too low an octane value is used, knocking or glow
ignition can result.
*) Research Method
This will,