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Old 12-22-2011, 09:27 PM
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Will an oil cooler lower coolant temps?

Hey everyone,

Just curious, I'm about to start working on my truck again after a couple years sitting in the garage. The cooling system is just adequate, with 30% antifreeze and wetter water it does not over heat but sitting in traffic the fan never turns off. Admittedly the radiator is too small.

So would adding a engine oil cooler lower the water temps? I figured I would add a small fan to it and wire it to come on when the radiator fan comes on.


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Old 12-22-2011, 09:35 PM
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i would say that it would help a lot
oil cooler and built-in fan kits, are plentiful on summits' site
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Old 12-22-2011, 09:40 PM
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On one of my other cars, I use to monitor the oil temperature. I have a good gauge in the side of the oil pan so I could monitor the temperature. I also had a water temp guage to the manifold regulating water temp. I found the oil temp was always within 20 degrees lower than that of the water temp. Stop and go traffic got the oil pushing about 200 degrees, but hit the open road and within a few miles it was down to 170-180 max. Water always sat at about 190 or 195 degrees whether it was stop or go traffic. I never ran another oil cooler on an engine. I feel an oil cooler is a waste on a street rod. I'd focus more on the radiator and cooling fan system.
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Old 12-22-2011, 11:43 PM
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I installed a Engine/Trans combo Cooler on my 71-C10, Coolant Temp is lower and Oil Pressure is higher.
I added it to help when Towing. Takes a while for the Engine Oil to get hot enough 180* to open the thermostat & allow flow to Cooler under normal driving in warm weather.
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Old 12-22-2011, 11:53 PM
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My setup with cooler, coolant is a steady 180 and the oil also.
When I had a cracked oil filter adapter and the oil did not get through the cooler, oil temp went to 210/215, coolant was not affected.
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Old 12-23-2011, 12:31 PM
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My car came stock with an oil cooler built into the radiator. When I swapped radiators during the SBC install, I no longer had the oil cooler. Radiator was hard pressed to maintain under 220* in the florida summer. I hooked up an aftermarket oil cooler and dropped to 200-205* middle of summer. Not sure if it would be needed in the winter time.

Due to the mechanics of the SBC transplant I had to go with a dual remote oil filter. This made adding an oil cooler very easy as most of the plumbing was already done.
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Old 12-23-2011, 07:11 PM
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The oil cooler will help, but by the time you buy it, buy the fan, T stat relay, and lines to plumb it in you could have just purchased a larger radiator and be cooler easier and cheaper.
I'd get the biggest welded aluminum radiator you can find with two 1" rows of cooling, and you should be good to go.
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