Volvo 164 Instruction Book page 43

SERVICING
20 Replacing the air cleaner paper filter
The air cleaner consists of a plastic cover
with replaceable paper filter insert. The
i nsert should be replaced after every
40 000 km (25 000 miles). Replacement
should be carried out more frequently if
the driving conditions are often dusty. No
other kind of cleaning is required outside
these intervals.
To replace release the hose clip for the
air preheater and also the tensioning
clips securing the air cleaner cover. The
cover can then be removed so that the
i nsert is accessible for replacement.
42
21 Valves
The valve clearances should be checked
after every 10 000 km (6000 miles).
This check should be carried out by a
workshop.
22 Compression test
To get some idea of the condition of the
engine, a compression test should be
made after every 10 000 km (6000 miles).
This test should preferably be carried out
by a workshop.
23 Fan belt
The fan belt tension should be checked
every 10 000 km (6000 miles). Due to wear
or dirt, this belt can start slipping with
poor cooling and poor alternator output
as the result.
Another way to test the tension is to press
i n the fan belt at a point midway between
the alternator and the fan. It should be
possible to press down the belt about
10 mm (3/8") with normal pressure.
The check can be suitably carried out by
a Volvo workshop.
24 Check the coolant level
The cooling system must be well filled
with coolant and not leak if it is to operate
at maximum efficiency. Check the coolant
l evel when filling up with fuel. The level
should be between the "Max" and "Min"
marks on the expansion tank.
The check should be carried out with
particular thoroughness when the engine
i s new or the cooling system has been
empty.
Do not remove the filler cap other than
for topping-up with coolant.
removal interferes with the coolant circu-
l ation between the engine and the expan-
sion tank during engine warming up and
cooling.
Frequent