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Oil Cooler Installation Questions

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Old Aug 10, 2005 | 08:39 AM
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Default Oil Cooler Installation Questions

I will soon be receiving a Dewitt's EOC radiator and have a couple of questions.

Can Russell twistlock or Aeorquip socketless hose and hose ends be used instead of stainless braided AN hose/fittings? Both the Russell and Aeorquip products are rated for oil and up to 250 psi. That seems like plenty. They are also cheaper and easier to work with.

Does any one make an oil cooler adaptor block (-8 AN fittings) with a thermostat built in? I don't want my oil to run too cool in the winter. I wonder what GM uses on the LS based trucks that come with a factory oil cooler?
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Old Aug 10, 2005 | 03:43 PM
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Originally Posted by VortechC5
Does any one make an oil cooler adaptor block (-8 AN fittings) with a thermostat built in? I don't want my oil to run too cool in the winter. I wonder what GM uses on the LS based trucks that come with a factory oil cooler?
I don't think you will need a thermostat with Tom's EOC setup. That is what makes this setup so attractive for a street car. Figure the EOC is in the engine coolant so the oil should never get any cooler than the water temperature. Plus when you start the engine cold, as soon as the engine thermostat starts to open the water should start heating up the oil which should actually heat the oil up faster than without the cooler. Which would be great for a street car. I'm sure the external coolers cool better than the internal coolers and would be better for race cars, but for a street car I think the internal is the ultimate setup as long as your not running is really hard and over working the cooler.
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Old Aug 10, 2005 | 04:20 PM
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I guess I'm old school as I still prefer ss braided hose and fittings over the socketless style but I believe socketless hose and fittings are approved by all sanctioning bodies for most if not all classes.

If you want to use an oil thermostat for your cooler, check out Earl's 501ERL (Summit# EAR-501ERL) billet oil thermostat. The thermostat begins to open at 160°F and is fully open by 180°F. It has -10 AN female fittings so you will need adapters: http://www.holley.com/HolleyNews/article.asp?ID=17
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Old Aug 11, 2005 | 08:03 AM
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Thanks for the info about the EOC thermostat and socketless hose/lines.

Currently without an EOC my oil temp in the winter is 190ish when the ambient temperature is below 50 degrees. My concern is that with the EOC it will be much lower.
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Old Aug 12, 2005 | 08:25 PM
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Originally Posted by VortechC5
Currently without an EOC my oil temp in the winter is 190ish when the ambient temperature is below 50 degrees. My concern is that with the EOC it will be much lower.
I think unless your in a really really really cold environment you should be OK. As long as your coolant thermostat is opening the oil shouldn't get too cold, the water will actually heat the oil. If your in a very very cold environment then you probably want to cover some of the radiator anyway. Without a cooler and under lite engine loads the oil temp should be close to the water temp. As the water temp changes the oil will slowly follow. With an internal cooler you should see the same thing, but the oil temp will change quicker staying closer to the water temp. Under high RPM heavy load is where the oil will heat up and the water will try to keep it cool. That is were the external cooler works better, it has to cool better hanging out in cool air than stuck in 200 degree water. But for an every day street car I think the internal cool is the trick. On startup it should actually bring the oil temp up faster than without a cooler.
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Old Aug 12, 2005 | 08:43 PM
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Thanks. I'll try it out and see what the oil temps are in the winter. If they are too low I will worry about it then. I run a 175 degree thermostat. In the winter my engine temps will run in the high 160s to low 170s with the ambient temps in the 30s.
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