Volvo 164 Owner's Manual - page 30
TECHNICAL DESCRIPTION
ENGINE
The engine is an in-line six-cylinder, water-
cooled injection unit with overhead valves.
The engine has a very rigid cylinder block
made of special cast iron and is cast in one
piece.
The cylinder liners 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
bearings.
Lubricating system
Engine lubrication
is
taken care of by a
gear pump located in -the oil sumo. The
pump is gear-driven from the camshaft.
From the pump the oil is forced through the
full-flow type oil filter and then along oil-
ways to the various lubricating 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 fullflow type, that is, all the oil passes
through the filter before continuing on to
the engine lubricating points.
Cooling system
The cooling system is of the sealed pres-
sure type and incorporates a circulation
pump.
When the engine is cold, the coolant cir-
culates only inside the engine. As the en-
gine warms up, a thermostat valve starts
opening the outlet to the radiator.
An expansion tank prevents air from cir-
culating
with the coolant as this would
cause corrosion in the cooling system. The
fan is driven via a slip coupling which
keeps the fan speed at about max. 42 r/s
(2 500 rpm).
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