John:
For what its worth, heres what I did on my
67 4/4.
The Morgan club magazine discussed this problem
and concluded that the cars tend to generate a
high pressure area under the bonnet at speed. Thus,
airflow through the radiator is inhibited. The guy
that wrote the article worked for Kenworth and had
the Kenworth engineers analyize the problem.
Their suggestion was to construct a rectangular sheet metal
plate to fasten to the front crossmember below the radiator.
This prevents airflow into the engine compartment unless
through the radiator. They also suggested a coolant recovery
tank.
I did both and have 0 cooling problems.
Regards
Claude Dennis
At 10:08 PM 3/15/96 -0500, John T. Blair wrote:
>Ha gang,
>
>I just ran across an intersting debate on the Britsh car mailing
>list about engine overheating. It was a theoretical (sp) argument.
>This got me thinking... a dangerous prospect. Have any of you
>had overheating problems, and how have you fixed them?
>
>My 4/4 Series V has always overheated, so when I restored it, I had
>the radiator roded out. I also found a 160 deg. thermostat. Guess
>what? She still over heats.
>
>It tends to overheat when at speed. In fact, as I pull away from a
>traffic light, I can watch the temp guage climb. When I stop for
>the next light tends to cool down. However, this can be short lived
>as I have overheated in a parade.
>
>In discussions with numerous people about that I've received the
>following suggestions:
>
>1. Put an electric fan on it.
>
>2. Add a heater core (from a pick up truck) under the hood and tie
> it into the heater system.
>
>3. Install a +8 radiator.
>
>4. Make a scoop for under the grill.
>
>
>Items #1 and #2 make sense, especially at idle and parades. However,
>I hesitate to use them as I show my car with the AACA and I'd either
>loose a lot of points, or I'd have the hassel of undoing the
>modification before every show.
>
>Item #3 is supposedly the "real" ticket. However, it is expensive
>and the few people I've talked to that have done it say they had a
>lot of trouble fitting the radiator. The brackets had to be moved
>etc.
>
>Item #4 might work at speed and could be made to look very original.
>Only a "true" Morgan-ite would know it wasn't. I haven't tried this
>yet.
>
>One last item a friend was trying, that is to make a dam from the
>radiator forward to the grill to help funnel all the air through
>the radiator. But, my friend said that didn't help his car.
>
>Anyone have any other ideas or comments on what has helped on their
>car?
>John T. Blair WA4OHZ email: jblair@nhr.com
>Va. Beach, Va Phone: 495-8229
>
>48 TR1800 48 #4 Midget 65 Morgan 4/4 Series V
> 75 Bricklin SV1 77 Spitfire
>
>
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