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Chronic Overheating
So you've eliminated the obvious cooling system components and it still
overheats?
 Well, if your oil gets dirty very quickly, the resulting sludge
can reduce the flow of cooling oil under the pistons. Deposits under the
piston skirts can also prevent heat dissipation.
This problem can be easily corrected. Simply run the engine at a fast idle
with clean oil, treated with Flushing Oil
Concentrate (FOC) for 30 minutes, and bring the entire oil wetted
side of the engine back to pristine cleanliness.
For high engine load application, AW10
Antiwear is also recommended to reduce friction, wear and heat
build up at highly loaded parts. AW10 is also useful for
reducing operating temperature in transmissions, differentials, hydraulics,
etc.
Testimonial
Datsun SD25 Diesel. For 4 years, Allan Dickson had been unable to solve
an overheating problem. Despite flushing the cooling system, and fitting
a larger radiator, it would always boil up the Toowoomba Range. After using
FOC, it gets up the range at 70 kph (instead of
40-50 kph) without overheating. One of the functions of oil is to cool, and
if flow is restricted, overheating results.
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