Diesel cooling options and ideas

[Primer Gray]

Buttoning up the prototype install…

Also installing the larger Mishimoto radiator and 2024 grill to catch as much air as possible.

I’ll be towing a 6000lb trailer and full bed of cargo up grapevine on I-5 this weekend…

Have no idea how this will play out, but I’ve just about done everything in my power to solve the derate problem.

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[PJZ]

The grapevine is an excellent test. Will be interested to see if this cools enough to keep temps down vs directly cooling the oil. Keep us posted @Primer Gray !

 

[@californiajeeping]

Buttoning up the prototype install…

Also installing the larger Mishimoto radiator and 2024 grill to catch as much air as possible.

I’ll be towing a 6000lb trailer and full bed of cargo up grapevine on I-5 this weekend…

Have no idea how this will play out, but I’ve just about done everything in my power to solve the derate problem.

WELL DONE!

Maybe a bug screen on the front?

 

[Primer Gray]

The lip surrounding the opening is there to nest a mesh screen or block off plate for use in cold weather — so that feature is definitely possible as a simple add-on.

 

[rharr]

Buttoning up the prototype install…

Also installing the larger Mishimoto radiator and 2024 grill to catch as much air as possible.

I’ll be towing a 6000lb trailer and full bed of cargo up grapevine on I-5 this weekend…

Have no idea how this will play out, but I’ve just about done everything in my power to solve the derate problem.

Your Efforts are very commendable. I am looking forward to this with baited breath.

I just got done doing a 3800 mile round trip, from az to Kentucky and back, pulling a utility trailer with 1100 pounds of bike and 600 pounds of gear in the bed at 75 to 80 and didn't have any derate issues, but the trip was mostly flat.

 

[@californiajeeping]

The lip surrounding the opening is there to nest a mesh screen or block off plate for use in cold weather — so that feature is definitely possible as a simple add-on.

How did it do? Did you try the mishimoto radiator yet? I am doing that as step 1.

 

[Chief_jeep]

Forgot to mention about the disconnect flip. But the radiator is 26.5" wide which is about the inside distance of the frame rails so it should fit with no major issues. Main concern is the not great airflow to that part but should still be better than nothing.

I wish I had seen this before I ordered. I spoke with them and asked for dimensions and the ones they gave me were way off. My shop is building some brackets to mount it up but it ended up being a lot more work than it would've been. It's not the end of the world but it is pretty frustrating that they don't know how to use a measuring tape and it makes me wonder how much attention to detail they have in their products.

 

[Primer Gray]

How did it do? Did you try the mishimoto radiator yet? I am doing that as step 1.

Got it in yesterday—it was a complete nightmare.

The radiator is a friggen pig.

The wraparound intercooler bellows make slight contact with the sides of the unit which is concerning but there’s nothing else to do about it as they literally left zero clearance.

I’d definitely recommend setting 2 days aside to attempt this one, everything has to come off the front of the vehicle and there’s no way to slap it back together quickly if things take a turn for the worse.

With the new radiator and auxiliary cooler down below I’m seeing a nominal 202 degrees while freeway driving (~70mph) with no load on flat ground.

The real test will be this afternoon when I take it over northbound I-5 grapevine. I just loaded the pickup bed with about 900 pounds of tools/hardware and am hitching up the 6000 pound travel trailer with full water and propane tanks.

 

[Primer Gray]

Hold my beer…

 

[Primer Gray]

Well, that actually went really great.

I maintained between 50-70 mph the entire ascent up the grade. Prior experience with less weight would have me in that super exciting 35-45 mph range, so yeah, I think I can keep the truck now

I never had a derate, but totally could have if I pushed it…. Oil temperature briefly topped out in the 260 range, think my Coolant topped around 240 but that was also ever so brief and pretty easy to manage because as soon as I would let up on the throttle the temperatures would fall rapidly.

At one point I had to slow down to 20 mph due to the semi traffic—but once I had a chance to make a pass there was plenty of power to accelerate back into the 50-60 range while still climbing a steep section of the grade.

Screenshot is at the top of the mountain, maybe a mile past the crest — heat soak doesn’t seem to linger a bit like before (but it was only 60 degrees at the summit, about 85+ degrees at the base when I started the climb).

Was it the grill? The new radiator that has a terrible fit? Or could it be that little BPD aux. cooler…. ?

 

[22EcoDs]

Well, that actually went really great.

I maintained between 50-70 mph the entire ascent up the grade. Prior experience with less weight would have me in that super exciting 35-45 mph range, so yeah, I think I can keep the truck now

I never had a derate, but totally could have if I pushed it…. Oil temperature briefly topped out in the 260 range, think my Coolant topped around 240 but that was also ever so brief and pretty easy to manage because as soon as I would let up on the throttle the temperatures would fall rapidly.

At one point I had to slow down to 20 mph due to the semi traffic—but once I had a chance to make a pass there was plenty of power to accelerate back into the 50-60 range while still climbing a steep section of the grade.

Screenshot is at the top of the mountain, maybe a mile past the crest — heat soak doesn’t seem to linger a bit like before (but it was only 60 degrees at the summit, about 85+ degrees at the base when I started the climb).

Was it the grill? The new radiator that has a terrible fit? Or could it be that little BPD aux. cooler…. ?

Your coolant is definitely running cooler. The spread from oil to coolant temp on mine is never that far at operating temp.

 

[@californiajeeping]

Well, that actually went really great.

I maintained between 50-70 mph the entire ascent up the grade. Prior experience with less weight would have me in that super exciting 35-45 mph range, so yeah, I think I can keep the truck now

I never had a derate, but totally could have if I pushed it…. Oil temperature briefly topped out in the 260 range, think my Coolant topped around 240 but that was also ever so brief and pretty easy to manage because as soon as I would let up on the throttle the temperatures would fall rapidly.

At one point I had to slow down to 20 mph due to the semi traffic—but once I had a chance to make a pass there was plenty of power to accelerate back into the 50-60 range while still climbing a steep section of the grade.

Screenshot is at the top of the mountain, maybe a mile past the crest — heat soak doesn’t seem to linger a bit like before (but it was only 60 degrees at the summit, about 85+ degrees at the base when I started the climb).

Was it the grill? The new radiator that has a terrible fit? Or could it be that little BPD aux. cooler…. ?

You’ve done everything possible and still can peak the temps. Hard to believe.
To me sounds like I can get away with just the radiator.

 

[Primer Gray]

You’ve done everything possible and still can peak the temps. Hard to believe.
To me sounds like I can get away with just the radiator.

The radiator alone will probably help, but the darn thing is buried so deep in the stack and has undersized dimensions… not to mention it really has some serious fitment issues.

You’d probably get a better return with the supplemental BPD cooler than the radiator because it eats up some of the heat load from the oil heat exchanger before the coolant gets dumped back into the radiator.

Everything I’ve done has made a dramatic difference, but this cooling system is still under sized for what I’m demanding of it — total turd sandwich because this little engine is capable of so much more.

 

[Primer Gray]

One more interesting thing about the BPD Aux. Cooler — the antifreeze seems to always be circulating regardless of temperature. So it appears to bypass the thermostat altogether.

 

[Rusty PW]

One more interesting thing about the BPD Aux. Cooler — the antifreeze seems to always be circulating regardless of temperature. So it appears to bypass the thermostat altogether.

You could adept an oil thermostat to use if you want to regulate the coolant temp. You can buy these with different temperature openings.

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