Engine - Volvo 164 Instruction Book

ENGINE

The B 30 A type engine is a six-cylinder,
water cooled carburettor unit with over-
head valves. The engine has a very rigid
cylinder block made of special cast iron
and is cast in one piece. The cylinder
l i n ers are machined directly in the block.
The cylinder head has separate inlet and
exhaust ports, one for each valve.
The statically and dynamically balanced
crankshaft is carried in seven main bear-
i ngs.
Lubricating system
Engine lubrication is taken care of by a
gear pump located in the oil sump. The
pump is driven by a gear from the cam-
shaft. From the pump the oil is forced
through the full-flow type oil filter and
to the various lubri-
then along oilways
cating points. A relief valve is built into
the oil pump and prevents the oil pressure
from reaching excessively high values.
The oil filter is of the full-flow type, that
i s, all the oil passes through the filter be-
fore continuing on to the engine lubri-
cating points.
Fuel system
The engine is fitted with twin carburettors
of type Zenith-Stromberg. The diaphragm-
type fuel pump draws fuel from the tank
TECHNICAL DESCRIPTION
and pumps it to the carburettors. A filter
built into the fuel pump removes any im-
purities in the fuel.
On certain markets the vehicle is fitted
with a gas fume evaporation control
system which takes care of fumes from the
carburettors and fuel tank.
Air preheating
The engine has thermostatically controlled
air preheating. This keeps the intake air
temperature constant and thus counter-
acts ice forming in the carburettors and
makes for shorter warming-up after cold
starting.
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