Diesel cooling options and ideas

[Stan H]

The Gen 2 EcoDiesel folks learned this over 10 years ago. More fuel = more heat. As long as you back off, then it's fairly manageable to keep cooling in check. Not everyone has the patience to slow down, which is the crux of the issue.

How did Jeep earn such a high tow rating on the EcoDiesel? Afterall, the SAE J2807 Davis Dam Grade Test is very difficult. It requires a 11.4-mile climb at a 3% - 7% grade in ambient 100*F ambient temperatures with the A/C at maximum output. Well, I can tell you how they did. The towing requirement has a minimum speed of 40 mph.

Perzactly

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[@californiajeeping]

Been running the csf racing radiator through winter which wasnt a good test. Now its 89-90 degrees.

It has kept the engine oil below 230 even climbing passes where I would spike to 250 and coolant temps below 218 no matter what.

If I turn the tazer cooldown on; coolant temps drop to 180-190 and oil stays around 208-210.

This setup works amazing.

 

[MaximusTX]

Been running the csf racing radiator through winter which wasnt a good test. Now its 89-90 degrees.

It has kept the engine oil below 230 even climbing passes where I would spike to 250 and coolant temps below 218 no matter what.

If I turn the tazer cooldown on; coolant temps drop to 180-190 and oil stays around 208-210.

This setup works amazing.

Did you do their transmission oil cooler as well or just the radiator?

 

[@californiajeeping]

Did you do their transmission oil cooler as well or just the radiator?

Trans cooler as well which works great BUT! the factory cooler has a thermostat that bypasses the cooler. Randomly the trans temp will still hit 200 degrees. No rhyme or reason not load related etc....I think it needs a bypass setup like the Ram/hemi trans aftermarket has.

I will randomly in 50mph traffic see a 200 degree trans temp that eventually cools down.

 

[rharr]

I assume the trans cooler is integrated into the new CSF radiator?
I can't remember if you have any type of tune or not, but GDE's tune will let you run a 190 thermostat vs the stock 209 one. I have noticed running a 190 thermostat it gives the motor a little more headway and helps reduce temp spikes. It also seems to cruise about 10 degrees lower then stock. I haven't tried to pull a big hill at 75 yet, that will always spike my temps.

 

[JTdiRtyD]

Been running the csf racing radiator through winter which wasnt a good test. Now its 89-90 degrees.

It has kept the engine oil below 230 even climbing passes where I would spike to 250 and coolant temps below 218 no matter what.

If I turn the tazer cooldown on; coolant temps drop to 180-190 and oil stays around 208-210.

This setup works amazing.

A quick googs search and found CSF radiators on Rockauto for $105 and got REALLY excited but thought to myself that can't be right. Maybe it's on sale? Maybe it's a typo and I should jump on it before they catch it? Then I realized theres CSF and CSF Race, and you have the latter at $725.

For anyone looking, the lesser expensive CSF variant is 11% wider at 30mm single row, which I guess could help some but probably negligible, but the race is 42mm and 2-row which is almost double the cooling.




Also, regarding trans temps. If anyone is seeing high temps then by all means make attempts to bring them down, but transmission oil is designed to operate between 175 and 220 deg (give or take a couple deg depending on branding). It's not considered hot until ~240deg. In the ZF trans 200 deg is nominal for normal driving. Too cool of trans fluid and you reduce efficiency.

 

[Chance575]

csf has less fins per square inch. The factory has more tubes and tighter fins, but is just a tiny radiator period. Once you see it out of the truck you understand why it gets hot.

 

[@californiajeeping]

220 isnt too hot with a trans but keeping it below that leaves more headroom to prevent spikes. I see the hellcat guys trying to keep them around 160-180.

Oddly enough after all of my cooling modifications my jeep sees its highest coolant temp getting off the freeway and immediately parking/idling to get fuel etc because the fan never turns on. It never kicks on anymore so the coolant gets up to 210-220 which was normal temp before modifications. With any airflow even AC running it stays below 200. The thermostat is clearly doing all of the work here.

 

[@californiajeeping]

 

[NCJL]

I read about this, earlier in this thread, possibly the JL Forum. Never thought much it because the overflow bottle has shown Max since new.
I recently replaced my Alternator. The install required me to remove the upper and lower radiator hoses, draining a little over half a gallon of coolant.
Once install was complete, I filled up the coolant to Max on the overflow bottle, about the same amount that drained out. I then compressed/pumped the upper and lower hoses several times, draining the overflow bottle. Filled to max again. Repeat process. Overall I got about 1.3 quarts more coolant in than I got out.
Now the damn thing runs 10 plus degrees cooler!
Maybe this was the issue since new.

 

[rharr]

I read about this, earlier in this thread, possibly the JL Forum. Never thought much it because the overflow bottle has shown Max since new.
I recently replaced my Alternator. The install required me to remove the upper and lower radiator hoses, draining a little over half a gallon of coolant.
Once install was complete, I filled up the coolant to Max on the overflow bottle, about the same amount that drained out. I then compressed/pumped the upper and lower hoses several times, draining the overflow bottle. Filled to max again. Repeat process. Overall I got about 1.3 quarts more coolant in than I got out.
Now the damn thing runs 10 plus degrees cooler!
Maybe this was the issue since new.

There is a air bleed plug on the thermostat housing. It is a little 1/4" screw cap in a ackward place. Remove the cap to bleed the air.

FYI be very careful with the cap it's fussy and easy to drop, and that part of the motor has tons of nooks and crannies to swallow things to be never seen again.....

 

[Chance575]

$85 and does an amazing job of bleeding the cooling system

https://www.harborfreight.com/cooling-system-test-and-refill-kit-64985.html

 

[OrangeCJ]

Hey All, seems like this thread just keeps on truckin! Been a while, but i just got a new travel trailer, so I wanted to check on the progress!

I this post from @biodiesel and I was wondering if there has been any updates? Wasn't able to access the facebook group.

Mat has been working on that for two years. Here's a sneak peak of what the oil filter adapter cap will look like.

 

[biodiesel]

I was wondering if there has been any updates?

Yes, it's available for purchase. The cost is $565 shipped.

 

[VA6489]

Yes, it's available for purchase. The cost is $565 shipped.

Link to you website?

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