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Which oil cooler, oil/water or oil/air? 700

posted by  aj12 on  Fri Jul 25 10:42 CST 2003
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last visit: Mon Sep 24 11:39 CST 2007
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I am putting together a working B230ft from two hosts: an '88 and a '92. The engine will go into my '88 745ti. I can use the original oil-to-air exchanger, or I can use the newer oil-to-water cooler. Which one should I use?

I searched for a couple of hours, thinking I would find all kinds of archived discussions on this topic. I found a couple of posts: One said the oil/water cooler on the B230ft is "problematic"; a few more posts talked about water hoses bursting; and a final post said the oil/water cooler is "very effective".

John S., which one would you use? ;)


Thanks,

A








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    Which oil cooler, oil/water or oil/air? 700

    posted by  vinraz on  Mon Jul 28 08:39 CST 2003
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    I think the oil to air is by far superior for one simple reason. Even on a hot day the air temp may get to slightly over 100 degrees. I do not think the temp of water in the cooling system ever get that low.








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    Which oil cooler, oil/water or oil/air? 700

    uid 55's pic
    posted by  john sargent on  Sun Jul 27 08:09 CST 2003
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    last visit: Wed Oct 22 09:07 CST 2014
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    Either will work well. The oil/water version will be an easier installation, but the hose connection at the bottom is a weak point. This hose becomes oil wetted from oil changes and can leak and burst. It is all downhill from there as the engine overheats....

    If you want to use the later intercooler, induction system, radiator, and electric fan you must use the oil/water heat exchanger. The late style radiator and intercooler are too wide for the air/oil heat exchanger.

    If you want to use the air/oil heat exchanger you must use the early intercooler and radiator. This installation is less maintenance since you don't have two more coolant hoses to watch.
    --
    john








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    Which oil cooler, oil/water or oil/air? 700

    posted by  The Zoo Keeper on  Sun Jul 27 04:16 CST 2003
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    last visit: Fri Jun 27 08:34 CST 2008
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    Hmmm, that's a tough one. I cannot say there is any REAL advantage in one over the other...overall. I would use what you have, as opposed to purchasing anything new. If you go with an oil/air cooler you need to mount it, and that would generally be infront of the A/C condenser, which WILL hurt A/C performance, if you go oil/water you are putting a lot of extra heat into the cooling system. Our '87 744TI has the oil/water system, and it has worked flawlessly, and does not leak a drop. It also has a liquid cooled turbo, so our coolant can get real hot real fast.
    --
    JohnG 1989 245 MT @216,500








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    Which oil cooler, oil/water or oil/air? 700

    posted by  someone claiming to be J on  Fri Jul 25 11:06 CST 2003 [RELATED]

    Definitly oil/water. Much more effective in reducing heat.







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