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Discussion Starter #1
So after traveling with my tt I decided it would be best to install an engine oil cooler.

I wrote this up after my last travel to let others know how I like my truck if they're thinking of towing. Summary...Everything went great! Max temps seen before are as follows

http://www.ramforumz.com/showthread.php?t=145900

Trans-163f
Engine-222 most of the way max of 230f
Coolant-215f

On the way home the engine ran a little higher around 228 and the final hill to my house is about a mile straight up at 20mph and engine maxed at 237f

With these higher engine temps it made me a little nervous because I never saw these temp drop when traveling, it always stayed constant once the temperature rose.

Now I installed the engine oil cooler last week and traveled the same route this week except i went an hour further into Vermont this weekend.

I installed the cooler below. It was an easy install...see the video below, it will help if you have questions on install.

http://www.etrailer.com/Engine-Oil-Coolers/Derale/D15405.html

http://www.youtube.com/watch?v=TMKo-HDTLgI

Install took about an hour total and while doing this I also changed the oil and went to synthetic from conventional. In total with the cooler it took 8qts which is about 1qt more than before. Now I can't tell you for sure if the synthetic oil helped but i can tell you that together they performed very well.

With the temps seen above I was now running about 204f and saw 208f once. I did notice that the temp didn't really fluctuate like I expected. The cooler has a built in thermostat that is supposed to start cooling the oil at 180f. So I figured it would be able to keep the oil around this temp. However it didn't but did keep the temps about 20f lower than without the cooler. On the way home the hill before my house the temp rose to 212f which is 25f lower than it did the time before.

Running empty the temp hovers around 190f where it was usually 201-4f before


I will include pictures later so you can see what it looks like. If you have any questions let me know and i'll try to help an answer them.

Oh an btw this is not an additional trans cooler....some get this messed up, this is a cooler for the engine oil.

Overall I'm happy with the cooler and would install it again.
 

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Discussion Starter #3
looks like a ni e product. were the ambient conditions the same on yourntest runz?
Totally forgot to include that...they were actually very similar.

On the way up without cooler two weeks ago approx 72 out and had front windows cracked while driving. On the way back it was 90 and had the ac in.

This trip it was about 75 out and had ax on, on the way up and 86 on the way back with the ac on also.

On both trips we left about 6am and left at about noon.

Driving style also changed a little, on the first trip I had too much grease on the wdh and it was causing sway so I drove about 55, where the most recent trip I was able to travel 60-65 mostly around 60.

Driving faster would have only caused the engine get hotter faster. I didn't notice any more shifting with the increase in speed.
 

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Have the factory guys seen this upgrade? Or has it caused you any warranty issues?

I'm thinking about doing the same thing because I see my oil temp getting dangerously warm!! And it doesn't come down in temp for an extended period compaired to the cooland and tranmission...
 

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Discussion Starter #5
Have the factory guys seen this upgrade? Or has it caused you any warranty issues?

I'm thinking about doing the same thing because I see my oil temp getting dangerously warm!! And it doesn't come down in temp for an extended period compaired to the cooland and tranmission...
Truthfully I never considered that and I'm kinda wondering now. It can easily be taken off as it just unscrews and cut a few wire ties and its gone ten minutes max. I may have to ask the dealer bc I do not want any issues with that as I've kept pretty much everything stock to keep warranty.

From a few more trips with the trailer my first impressions still stand. The temps are lower when towing usually around 200-210. However it doesn't seem to ever drop in temp which is what I was looking for when I installed it. It did add about 1 at of extra capacity for a total of 8.

Are you running synthetic oil? If not I would switch first and see what that does. I switched when I installed the cooler. Some say it will help others say it won't but I would give it a try first.

The highest I've seen before cooler way 237 which was the mile hill before my house at 20 mph which is the fastest you can go with or without trailer. Since install the highest I've seen is 215. Overall I like it but if it voids warranty I wouldn't do it so I would check with your dealer as they may say the exact opposite that mine does.
 

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Discussion Starter #6
to date the oil cooler seems to be working great. only 2000miles on it total but most of it was towing the 7500lbs camper as i have a work vehicle. I have made numerous 4hr trips with camper and overall it still lowered the temp about 20degrees. I have also checked numerous times for leaks and have yet to find one!
 

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Glad it is working out for you. It was a great post. Reps for you.
 

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oil cooler

I too experanced high oil temps while towing my TT in the mountains. I use Amsoil and was still a little worried at the oil temp spike and not coming down. I went a little different route and got a big cooler with a fan. It keeps the temp of the oil at 180 on very hot days. I have not towed yet but have a camping trip planned about 3 hours away at the end of the month.
Hear is the one I installed.

 
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Discussion Starter #9
Looks like a better setup than I have. I do not have a fan. Deffinetly let us know how it works. I do not see temps above 180 while driving empty since install and it takes about three times as long to get to the 175 mark than it did before. Would be very curious to know if it actually cools the oil. Mine just keeps temps lower but I've still yet to see it cool it once temps reach 200 it just keeps them there I've yet to see it drop to say 190 after reaching 200.
 

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Excellent mods. And good write ups.
 

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My oil runs at about 235-240 regardless if I'm driving it or it's idling. I figured this is the optimal temperature since it never fluctuates even when towing. Should it be that much lower (180)?
 

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Discussion Starter #12
From what I've read that's the way the 13s are. I've done a lot of reading on this and it looks like the highest conventional oil should be run at is 240 and 260 for synthetic. My vehicle was running about 200 not towing and at least 220 when towing. What are you towing? If its a smaller lawn trailer weighing 2000lbs you'll probably see no change I'm towing a 11 foot by 8foot by 30 foot brick down the road so lots of wind reistance along with weight. This was more ease of mind thing as all trucks should have warning lights but I just wanted it for peace of mind and some help on those hot days
 

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Yep mine was normal at 200 before the cooler and spiked to 258 going up a 6% grade. thats when I decided on the cooler. Once I get some pictures of the install I'll post.
 

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Do they have a cooler from the factory? It seems like some trucks can with a cooler from the factory, some times it runs the oil through the radiator, which at times wouldn't cool it very much.
 

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I'm towing a 5500lb travel trailer. Lots of mountains here so almost always going up hills until we are on our way home.
 

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Discussion Starter #16
Do they have a cooler from the factory? It seems like some trucks can with a cooler from the factory, some times it runs the oil through the radiator, which at times wouldn't cool it very much.
My truck is pretty much the most factory equipped truck from ram. My half ton came with e range tires along with class 4 hitch and the 3.92 rear all standard. This does not mention anything about oil cooler only heavy duty cooling and transmission cooler. I wonder what is different in the 2500 to make the cooling better for the oil?
 

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I never tow anything...EVER. and I watched that "how too" with rapt attention. Really nice work. Excellent clear and easy to understand.
 

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Some trucks and some cars come with an external oil cooler and/or and oil cooler that uses the radiator. I have a 3/4 ton truck and I can't even tell you what it has. For sure most of them come with an external tranny cooler plus the one in the radiator. I'm also think my wifes 300C and my Challenger has a power steering cooler, which isn't much more than routing the line in front of the car to cool it down a bit.
 

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Bump.

Very informative thread. I also tow a travel trailer at about 7K lbs and my oil temps go way up. Granted it's been 100 degrees out lately, but man most of my upcoming trips involve going up Cajon pass and then through the Mohave Desert. No way I'm going to make it without extra cooling, even with Synthetic oil.

I'm not sure my truck includes an extra oil cooler from the factory. Need to find out.

If any of the original posters have more info to share I'm listening with ears open!

Jason
 

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I'm the op, I had to slightly change my name as I forgot my password.

I since posting I have done a decent amount of camping this year putting on about 4000 miles of towing. I did have one leak on one of the fittings that required tightening of a hose clamp it has sense held which was during the winter. For comparison sake I now use penzoil 5-20 synthetic oil. I switched from Mobil one only because penzoil has the rating required by mopar and I use mopar oil filter from walmart. I also change my oil every 5000 miles.

Overall my impressions really haven't changed. Straight highway my temp hovers around 21 which is approx 10-15 degrees lower than without it. When going up a steep hill it does raise and will fall but takes a lot more time than cooling temps. When traveling back roads 30-55mph temps are any where from 190-200 usually in the middle. I'm still happy I installed it and would recommend it.

After traveling a lot with the camper the best way to keep down temps I've found is to drive sensibly. While the truck will pull many hills at 65 mph around here it may have to jump to 45 rpms or slightly more. This is when I see my temps raise the quickest. I've found staying between 3-3.5k rpms is my trucks sweet spot. It has enough power and doesn't lag but the temps don't go up to fast. I may be going up the hill at 5 but I'm in no hurry because it's only going to change my time in minutes. Also I haven't changed the cheap China tires on the trailer so it makes me feel better going a little slower as they have a max speed rating of only 65mph. Any other questions let me know.
 
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