Long ago, back in the seventies, I had the opportunity to buy a Tiger
II that a guy had rolled. I parted the car out (I know, I know) but
kept some of the parts for spares, etc. The Tiger II had an oil
cooler standard from the factory and I decided to mount it on my Tiger
(a MkIA) as it was just a bolt-on operation. I had the oil cooler on
the car for many years, but never really noticed any improvement as
far as cooling was concerned. As someone else said, it may be an
advantage when the car is raced or driven hard, but I never noticed
any change. I think that part of the problem is that the oil cooler
is mounted in front of the main radiator and, as a result, has two
negative effects which are related to one another. First, the oil
cooler blocks the flow of cool, outside air to the main radiator and
secondly, what air does eventually make its way through the oil cooler
to the coolant radiator has had its temperature raised. As a result,
you have a couple of competing effects taking place with the net
result being not much change. When I restored my Tiger, I took the
oil cooler off and have been happy with the result. Of course, I
don't have to deal with too many really hot days hereabouts and the
engine oils available today are a lot better in many ways than those
available when the Tiger was new. I sold the oil cooler on eBay for
more than I paid for the wrecked Tiger II. I suspect that if you
could find a place for the oil cooler where it was in the normal air
stream but not blocking the coolant radiator, it might be an
improvement.
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