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Old 11-04-2012, 10:18 AM
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Over heating

1940 Willy's. The further I drive the car the hotter it gets. New aluminum radiator. New full shroud. New spal slim line 16" fan. Car runs good but just gets hot. It has a small block chevy engine. Carburator and a mild cam. There is a sheet of aluminum blocking air flow from passing out from under the radiator Please send ideas. Thanks.

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Old 11-04-2012, 10:52 AM
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Simple!
Remove the sheet of aluminum under the rad. It's impeding the normal air flow.
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Old 11-04-2012, 12:58 PM
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How hot is hot?
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Old 11-04-2012, 07:00 PM
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Is the aluminum sheet helping direct air through the radiator? A picture would help.
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Old 11-05-2012, 07:14 AM
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over heating 350

Temp when pulling in the driveway was 250 on one guage and 235 on another.

The aluminum sheet runs from the bottom of the radiator to the frame under the radiator to keep fresh air coming in through the grill from passing under the radiator. I did pull off the goose neck where the thermostat goes and voila, no thermostat. I put in a new one and will try it out today. If that doesn't work the aluminum sheet comes out.

Keep the ideas coming.
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Old 11-05-2012, 07:20 AM
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NO stat???

put in a 140 and drill one or two 1/8" holes just inside the sealing gasket area to allow air to escape when filling rad..
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Old 11-05-2012, 07:23 AM
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Over heating 350

I already put in a 160 and I bought one that already has the bypass holes in it. Thanks.
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Old 11-05-2012, 07:24 AM
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Quote:
Originally Posted by dilligaf View Post
Temp when pulling in the driveway was 250 on one guage and 235 on another.

The aluminum sheet runs from the bottom of the radiator to the frame under the radiator to keep fresh air coming in through the grill from passing under the radiator. I did pull off the goose neck where the thermostat goes and voila, no thermostat. I put in a new one and will try it out today. If that doesn't work the aluminum sheet comes out.

Keep the ideas coming.
I've got a V8 S10 that runs hot on the hiway also. I am assuming it is because there is no stat. Winter now with no chance to work on it, but come spring i'll bet that slowing down that coolant will drop the temps.
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Old 11-05-2012, 09:42 AM
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Originally Posted by dilligaf View Post
1940 Willy's. The further I drive the car the hotter it gets. New aluminum radiator. New full shroud. New spal slim line 16" fan. Car runs good but just gets hot. It has a small block chevy engine. Carburator and a mild cam. There is a sheet of aluminum blocking air flow from passing out from under the radiator Please send ideas. Thanks.
First place I'd look is at pulley ratios. The further one gets from what the factory would have used the more problems you begin to get. These old car instllations are usually pretty much on edge as there just isn't enough space for a modern radiator. So if you slow the pump while hunting more power you usually end up with a lack of sufficient flow to where the engine gradually overheats.

If it overheats without a thermostat this condition will probably not change with one.

Modern air flow through the radiator is less concerned with ducting air into the radiator than with creating a low pressure area under the engine compartment to help vent air through the radiator and out of the engine room. This is why most new vehicles have a chin spoiler.

The addition of an oil cooler can be of large benefit to reducing the coolant temp. An effective oil cooler can take 10-20 degrees off the coolant temp.

Bogie
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Old 11-05-2012, 04:47 PM
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Bogies Idea of a chin spoiler may be exactly what you need.
The 80s firebirds and camaros would overheat on the highway after the wife knocked off the chin spoiler at the piggly wiggly.
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