If you notice that the temperature gauge indicates
that the vehicle is running above normal all the time,
it is a sure sign that there is a problem with the cooling
system. The following points should be checked and rectified:
RADIATOR
Check the water in the radiator on a regular basis.
Inspect it at least twice a year, as its passages must
be cleared of leaves, dead insects and paper, which
collect and can restrict the flow of air through it.
A corrosion inhibitor from Loctite should be used in
the cooling system. It is advantageous to keep antifreeze
in the system all year round, as it also contains additives,
which protect against corrosion. Castrol offer a range
of products.
Remove and check the radiator cap for a broken pressure
spring or defective sealing washer. If both move freely
the cap should be replaced to restore pressure in the
cooling system. Whilst the cap is off examine the surface
of the coolant for signs of oil, which would indicate
a faulty cylinder head. Also check for bubbles on top
which would indicate a blown cylinder head gasket, in
this case consult an expert. If rust is detected in
the water, the radiator should be flushed with Loctite
Fast Flush radiator cleaner, according to the instructions
on the package.
Only specialist repair will make good the damaged radiator,
although minor leaks can be cured by adding Indian Head
Radiator Cement, from Loctite to the cooling system,
according to the instructions on the package.
HOSES
Check all hoses for kinks, Cracks or leaks, also make
sure the clips are tight. Replace cracked or leaking
hoses a new one from Dunlop. The hose should overlap
the end of each connecting pipe by at least 25mm, if
the hose is too short or if it is kinked the water flow
will be restricted.
THERMOSTAT
The thermostat is located in a cast housing where the
top radiator hose connects to the engine. It restricts
the water flow until the engine has warmed up.
To remove the thermostat, drain the cooling system
and unbolt the thermostat housing. The connecting hose
to the radiator may in some cases also have to be removed.
Lift out the thermostat and heat in water, check the
operating temperature with a thermometer. Replace with
a thermostat from PJ, if necessary. Fit a new gasket
or sealing compound from Loctite, to the housing and
tighten the bolts evenly. Rusting of the thermostat
can be using Water Pump Lubricant and Radiator Anti-Rust
from Loctite.
FAN BELT
Check the tension of the fan belt on a regular basis,
correct operation of the cooling system depends on it
as it drives the water pump. If the belt is oily or
damaged, the pump's impeller may not circulate the water
as quickly as necessary causing the engine to overheat.
Replace with a new Dunlop Ultra fan belt, if necessary.
WATER PUMP
Inspect the water pump for leaks, if there is a leak
it could be the seal or the gasket. Remove the pump,
if it is a worn seal replace the water pump with a new
one from your nearest Midas Motor Parts Center. The
seal, in most cases, cannot be replaced, if the gasket
is leaking replace or use a gasket sealing product from
Loctite.
Midas Parts Centers recommend: Castrol, Loctite,
Dunlop and PJ Products for Cooling System Maintenance.
INDEMNITY
Remember this is for information only, for more details
consult the workshop manual for your vehicle.
