3S-GTE Guys.......Oil Cooler users within please. Options

[Fastbird]

So after finally picking up an oil temp gauge, I'm noticing a pattern that I DON'T like. My oil temps are hovering around 220° during normal driving and for the short 7 mile blasts I go down the highway, they climb into the 230°-240° range. This is being light on the car.

I have a feeling that it would DEFINITELY benefit from an oil cooler. So my question for you guys is how are you plumbing the cooler into the system, and what kind of cooler are you using.

I'm looking at two different styles of transmission coolers available at my Auto Zone that I work part time at. One is a simple tube running through fins, like the cheap ones you see. The other is like a minature radiator, bar and plate style.

My thoughts on where to plumb them in are initally to come in on the drain side of the turbo and use a scavenging pump to move it through the cooler back into the pan. I think this would provide the greatest amount of efficiency but definitely NOT the best cost margin. Other than this, I can't think of where to plumb it in.

And for those wondering, I have the temp sensor for the gauge mounted in the filter sandwich adapter with no problems noted.

Any pics, write-ups, or ideas on setups you guys might have?

[scothaniel]

I'm using the Permacool cooler / filter relocation kit on my st185. After a year or so, I ended up replacing the hoses with some higher quality lines w/ pressed fittings, and ditching the whole barb ends / clamp connections. It may have been overkill, but I feel safer knowing my engine isn't going to seize due to a cheap clamp coming loose.

Anyways... According to the BGB, the path of oil in the 3SGTE starts at the pan and goes through the filter & cooler before hitting the main oil hole, so adding an additional (or alternate) cooler at the filter would offset the heat from the turbo:



A few cars had a secondary water cooler / pump setup just for turbos (Audi and Mercedes I believe). This could help in cooling the turbo, and thus cooling the oil inside the turbo? I'm guessing it wasn't a big drop, as I dont think either of those manufacture are still doing this.

This post has been edited by scothaniel: Mar 10, 2008 - 7:27 PM

[Fastbird]

I don't know about you guys, but with my DP.....there's only one way to fit anything in there on a sandwich adapter. There's simply not the room for me to add anything else to it.

Anyways... According to the BGB, the path of oil in the 3SGTE starts at the pan and goes through the filter & cooler before hitting the main oil hole, so adding an additional (or alternate) cooler at the filter would offset the heat from the turbo:

http://www.mr2-tech.com/bgb/mechanical/vol...l_0537_0001.jpg

I personally believe that the oil cooler would work better if the oil was cooled prior to getting back into the oil pan. That's my whole reasoning for all of this. I believe that it is more efficient to do it this way rather than cool it coming from immediately prior to the filter.

[alltracman78]

I personally believe that the oil cooler would work better if the oil was cooled prior to getting back into the oil pan. That's my whole reasoning for all of this. I believe that it is more efficient to do it this way rather than cool it coming from immediately prior to the filter.

I don't have anything but the stock cooler, and I don't monitor my temps as of right now; but while the turbo is probably what heats the oil the most, the rest of the engine combined uses more oil than just the turbo does, and does a pretty good job heating it as well.
Using a cooler in the stock location will cool ALL of the oil as it feeds to the engine, so the complete engine will receive cool[er] oil, instead of just cooling what goes through the turbo, ignoring the rest, and cooling what is in the pan instead of what is headed to the engine [yes I understand the oil in the pan will end up in the engine, but cooling it that way only cools part, not all].
It's your car and your decision, but you're probably better off cooling the same way Toyota did, at the filter.