4AGE 16V engine overheat when at high speed

[jondee86]

What has been known to happen is that the return hose from the radiator can get
"collapsed" by the suction of the water pump at higher rpm. This can only happen
if the hose is old and very soft, or if the hose has started to de-laminate internally.

Some radiator hoses have a coiled steel spring fitted inside the hose to prevent
the hose being sucked flat. But if the bottom radiator hose is very soft it may be
worth while putting a new one on to see if it solves the problem. If the top hose
is also very soft, maybe replace them both.

Cheers... jondee86