Triumph Stag Radiator and Hoses - Mk1 (Late) and Mk2 Models
Note: Late Mk1 & Mk2 radiators have a threaded filler plug type neck and an EXPANSION bottle that is fitted with a pressure cap
Maintaining the Stag cooling system in good condition is crucial in
ensuring proper efficient performance and prolonged engine life.
The radiator should be tested - professionally, and replaced if necessary.
Unless you are certain your hoses are in good condition we urge you to replace
each and every one, including the heater hoses.
The thermostat should be replaced as a matter of course, whilst the correct
strength anti freeze must be used.
And last but not least, we strongly recommend that you flush out the engine - thoroughly.
After installing a new radiator or, indeed, whenever you have cause
to drain the cooling system, you MUST ensure there are no air locks in
the system when running-up for the first time.
The heater must be 'full-on' (open) and all the hoses should be an even
temperature once the thermostat has opened.
If in doubt please consult a workshop manual.