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OIL Cooler Hose Kit

Old 05-17-2013, 01:37 PM
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OIL Cooler Hose Kit

Hay guys.. I was planning on upgrading my OIL COOLER lines. I was going to go with the Racing beat kit but I don't thing 400+ hot ones is a doable price for me... So I was wondering does anybody know the lengths of the lines I will Need..

I am going to do a line from the front tap of the engine to the oil cooler then from cooler to cooler then a tap to the back of the engine. Just need to know the approximate lengths I will need and also what size the tap fittings should be..

Thank You.

one more question.. I see the stock set up is set up in series. Does anybody have any idea if going with a parallel configuration work better for cooling?

So it would be routed: Line out then a T lines going to the input of each oil cooler then from the output of each oil cooler T back to a line going to the engine return..

Or does it just work better for cooling oil in the original routing config.?

Last edited by WreakLoosE; 05-17-2013 at 01:48 PM.
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Old 05-17-2013, 01:44 PM
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DIY section is for sets of instructions on how to do something. I don't see any instructions here. Moving to Tech.
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Old 05-17-2013, 01:44 PM
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Roger that.. ^

This is what I was thinking about when I wanted to change the routing of the oil cooler lines.

Name:  oilroute_zps836e76f1.png
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Last edited by WreakLoosE; 05-17-2013 at 03:38 PM.
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Old 05-17-2013, 07:55 PM
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Not going to help anything but the parts store
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Old 05-17-2013, 08:22 PM
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massive bottleneck
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Old 05-30-2013, 10:34 AM
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I have always wanted to do this and had it slated in my mind to do, just ran out of time. Did you ever do anything with this?

Looks like if you went parallel like you are showing you would need to go with a smaller line than the stock 10AN to maintain the proper oil pressures. Maybe going 10AN off the housing to the neck then 8AN from the coolers could work to maintain pressure. I can see how Parallel could maybe give you increased cooling, but I wonder if flow would be an issue?
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Old 05-30-2013, 10:41 AM
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call me crazy, but what exactly are you guys doing that you need to reinvent the wheel with the oil cooler routing? If your oil temps are getting hot enough that it is becoming a problem ... something is wrong.
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Old 05-30-2013, 11:00 AM
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Originally Posted by paimon.soror View Post
massive bottleneck
^this
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Old 05-30-2013, 11:05 AM
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The factory oil cooling system with dual coolers is more than sufficient and needs no help at all unless you are making substantially more HP than stock. Replacing the factory lines can be beneficial but I see no reason to do it unless your factory lines need replacement or you are tracking your car or making much more HP.
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Old 05-30-2013, 01:23 PM
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I agree that it isnt needed unless your making more power or the lines are having an issue. I have been wanting to for a long time because one of my lines has had a small leak for years.

When I first looked at what he posted I thought the same thing, huge bottleneck... but after looking at it it appears that it could be more efficient cooling. It depends on the flow as well, these things I really dont know a lot about.

Is oil being pulled from the rear housing and pushed from the front housing?
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Old 05-30-2013, 01:46 PM
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Second cooler is not useless because it just makes the oil from the first even cooler..... My thoughts anyway.?.?
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Old 05-30-2013, 01:47 PM
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Try it and see if a bottleneck occurs, could mean cooler engine oil which would help lots in hotter environments never hurts to try then if it don't work go bk to stock way :D. Your choice though i need to replace mine salt ate them
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Old 05-30-2013, 01:59 PM
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Originally Posted by abesRX8 View Post
I agree that it isnt needed unless your making more power or the lines are having an issue. I have been wanting to for a long time because one of my lines has had a small leak for years.

When I first looked at what he posted I thought the same thing, huge bottleneck... but after looking at it it appears that it could be more efficient cooling. It depends on the flow as well, these things I really dont know a lot about.

Is oil being pulled from the rear housing and pushed from the front housing?
Originally Posted by abesRX8 View Post
Second cooler is not useless because it just makes the oil from the first even cooler..... My thoughts anyway.?.?
The second cooler is a must, there is reason why it is installed on the hi-power 6 ports. Changing the overall routing of the oil lines is just dumb and there is no reason to do that. I never see oil temps above 210F and that is with my turbo adding heat to the oil.
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Old 05-30-2013, 02:21 PM
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Originally Posted by 9krpmrx8 View Post
The second cooler is a must, there is reason why it is installed on the hi-power 6 ports. Changing the overall routing of the oil lines is just dumb and there is no reason to do that. I never see oil temps above 210F and that is with my turbo adding heat to the oil.
I understand what your getting at for sure, but if your replacing the lines already why not do something that could make everything even cooler. Not saying that I know it will work but it does look like it could potentially bring the temps down cooler than what the stock routing is... Please remember I am not the OP just someone that is needing to replace lines anyway and the routing looks like it could potentially be cooler than stock.
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Old 05-30-2013, 02:37 PM
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Originally Posted by abesRX8 View Post
I understand what your getting at for sure, but if your replacing the lines already why not do something that could make everything even cooler. Not saying that I know it will work but it does look like it could potentially bring the temps down cooler than what the stock routing is... Please remember I am not the OP just someone that is needing to replace lines anyway and the routing looks like it could potentially be cooler than stock.

Why do you think it would potentially be better in this application? I am having a hard time understanding that logic when there are no oil cooling issues with the RX-8 as is. Do some reserach on the optimum operating temperature on engine oil, you will get what I am trying to say.
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Old 05-30-2013, 02:59 PM
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Originally Posted by 9krpmrx8 View Post
Why do you think it would potentially be better in this application? I am having a hard time understanding that logic when there are no oil cooling issues with the RX-8 as is. Do some reserach on the optimum operating temperature on engine oil, you will get what I am trying to say.
The stock layout appears that it is not giving equal cooling, but with the parallel it looks like your getting optimum cooling from both coolers both getting the initial heat then re-cooling then back to the engine. A bottle neck could be easily managed through the proper size lines and maintaining the proper pressure. Its just what I see, if your changing it all anyway why not do something that could be better with no additional work. Thats my logic...
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Old 05-30-2013, 03:08 PM
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In the stock setup all of the oil exiting the engine is cooled twice before going back to the engine. It doesn't get much better than that. His diagram is off a bit.
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Old 05-30-2013, 03:53 PM
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I will be tracking more... and i do like canyon carving when i can.. but that is it.. NA set up with basic upgrades no FI..
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Old 05-30-2013, 04:00 PM
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Your stock oil cooling system will be fine provided your ducting, etc. is in place. You can just replace the lines with -10AN line and fittings, remove the stock screw in thermostats, and get a real oil thermostat. But remember engine coolant temps do sort of go hand in hand with oil so make sure that is addressed as well. Also, get a good oil temp gauge installed if you have not already.
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Old 05-30-2013, 04:07 PM
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You could go with a larger single oil cooler and lines like I did (search single oil cooler) and you will get less lines, lower temps (depending on cooler efficiency) and more oil pressure as a result. But then you are committed to that so keep that in mind if you ever plan on selling. I went turbo and could no longer fit my single oil cooler so now I have a combination of a stock cooler and an aftermarket one that is working great. i still have my oil Fluidyne oil cooler, I need to put it on Ebay,
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Old 05-30-2013, 04:15 PM
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The OEM routing diagram was taken from the Racing Beat website... here is the picture they show... I added the red arrows..

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Old 05-30-2013, 04:17 PM
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Yeah, your return arrow in the first diagram just runs on the wrong side of the engine. Also remember, removing the stock return hard/soft line is a bitch with the engine in the car.
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Old 05-30-2013, 04:23 PM
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So -10AN Lines and fittings? And what good oil Thermostats should I be looking at? I will probably just go ahead and upgrade the lines and keep the oem config because they are old and the stock ones are crap. I just wanted to know if a parallel set up would be better on cooling. I also know coolant temps and Oil temps go hand in hand and I have done coolant upgrades and will do more.. water pump and t stat. I also have done the oil pressure regulator upgrade. Im just trying to cover all my bases here..
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Old 05-30-2013, 04:30 PM
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Any Idea on lengths for the lines?
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Old 05-30-2013, 11:27 PM
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I will be doing these soon, ordered a thermostat & fittings for the block from Earls. I have the length of the lines as well. Will do a DIY & post line lengths/fittings required in a couple weeks.
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