Novak Conversions Jeep Wrangler TJ engine mounts

Need Cooling Help for Hemi Swap

Those AEV conversions were well done by all accounts.

I'd say Mishimoto has lost it's shine among the jeep crowd via the newer models where the Mopar one isn't good. Only thing going for it is the replacement, but if it causes you to overheat and damages a head, it's not gonna fix that.

Champion has a more robust bar and plate model that seems to be better regarded for the typical TJ downflow.
https://shop.championcooling.com/2006-Jeep-Wrangler-TJ-SKU-BC2101

and a crossflow for the Chevy v-8 if that layout is better for your setup.
https://shop.championcooling.com/19...006-Jeep-Wrangler-SKU-8102?search=jeep&page=4

AEV is still around and you might consider contacting them for info on the original.

Agreed! Their swap, if I recall, was the first that integrated with the OEM bus, allowing use of the OEM gauges. They partnered with mother Mopar, so they had more "access" than other swap companies. I would argue that AEV was more like an OEM skunkwerx builder like Shelby or Roush. I have an AEV TJ, non hemi, and it's been my daily for twenty years, and it's been amazing.

I reached out to AEV already. They didn't have any part numbers, but they indicated that their best version of the TJ/Hemi conversion cooling system, the one they ended up with was a custom radiator/TJ shroud/OEM mechanical fan. US Radiator has a downflow hemi TJ radiator, and Advance Adapters has a crossflow.
 
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I'd prefer the crossflow given the choice. It has a small efficiency advantage. I'm sure AA aren't cheap though.

It's the same orientation as the Champion Chevy (LS) crossflow, including transmission cooler hookups btw.
 
If I don't need to run the MM lift, then I should be able to keep my options open as to using a mechanical or electric fan, correct, even if I use a body lift?

Speaking of body lifts, are the boatside style from Artec worth the hassle? AND.......what else is needed so that it doesn't look goofy? Steering column, shifters, etc., they all need to be raised as well? Also, that gives the opportunity for a tummy tucker.
 
Also since it came up, I have metalcloak single adjustable short arms in a mixed 2.5ish build on my 04 TJR. I chose them for the highway/nvh and maintenance sides over any JJ set of arms. Not an easy decision. Budget wasn't a concern. Owned it since new and have 78k on it. I've been happy with the arms. They get good offroad use, but I'm not trying to do any technical trails anymore. Just zipping up forest service roads to trailheads.

I Run the Barnes no-lift skid which improves belly clearance by 1" and is more stout, without a BL.
 
Those AEV conversions were well done by all accounts.

I'd say Mishimoto has lost it's shine among the jeep crowd via the newer models where the Mopar one isn't good. Only thing going for it is the replacement, but if it causes you to overheat and damages a head, it's not gonna fix that.

Champion has a more robust bar and plate model that seems to be better regarded for the typical TJ downflow.
https://shop.championcooling.com/2006-Jeep-Wrangler-TJ-SKU-BC2101

and a crossflow for the Chevy v-8 if that layout is better for your setup.
https://shop.championcooling.com/19...006-Jeep-Wrangler-SKU-8102?search=jeep&page=4

AEV is still around and you might consider contacting them for info on the original.

In the Magnum swap crowd the Champion radiators seemed to be HIT or Miss as far as quality which was why I said not to go with them. And these were the Chevy V-8 swap version.

If I don't need to run the MM lift, then I should be able to keep my options open as to using a mechanical or electric fan, correct, even if I use a body lift?

Speaking of body lifts, are the boatside style from Artec worth the hassle? AND.......what else is needed so that it doesn't look goofy? Steering column, shifters, etc., they all need to be raised as well? Also, that gives the opportunity for a tummy tucker.

You can try to fit a mechanical fan in... As I said before part of that depends on the core thickness and then how they made the mounting of the radiator. All you can do is pull it apart and measure to see if it'll fit. And YES you want a crossflow over a downflow if possible.

As far s the body mounts go you have to styles or options as it may be. The ones like the ARTEC are not liked by some as it's felt they can hang up on items more. The other option is the GenRight body mounts that also raise the 6 center mounts and are more similar to the stock ones.

1761194290010.png


https://genright.com/black-friday-2...tj-lj/?searchid=0&search_query=TJ+body+mounts

I'm running the SWAG body mounts

1761194489432.png


https://www.swagoffroad.com/products/swag-bertha-tj-wrangler-high-clearance-body-mount-skid
 
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This is how much room I have between the front of the engine and my radiator.

20240919_124752.jpg


My intake is through the cowl. And I'd gotten the idea from @NashvilleTJ . My IAT is normally about 20-30* higher than the ambient temperatures too.

20250602_101458.jpg
 
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This is how much room I have between the front of the engine and my radiator.

View attachment 650833

My intake is through the cowl. And I'd gotten the idea from @NashvilleTJ . My IAT is normally about 20-30* higher than the ambient temperatures too.

View attachment 650834

Good catch on the crossmember! I hadn't thought of that! There's not a lot of room in there, no doubt. That radiator looks robust! I had forgotten about the GenRight body mounts!
 
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I got my radiator from CG&J in Alabama. They make some serious cores for some very expensive equipment. They know what they’re doing.

Direct fit and set up for my Hemi. I run a slightly trimmed 4.0 fan shroud, 18” fan blade and a heavy duty Hemi fan clutch.

I can drive around all day, sit and idle as long as I want and slow crawl.

It has has only gotten to 210° once, and that’s a day is was extremely hot and I sat quite a long time stuck in a slow slow crawling line.

I have had a Mopar 203° thermostat and a Mopar Hemi Dodge radiator cap (for correct psi) in it since I built the engine 12,000 miles ago.

https://cgj.com/product/jp-3010-jeep-radiator
 
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I got my radiator from CG&J in Alabama. They make some serious cores for some very expensive equipment. They know what they’re doing.

Direct fit and set up for my Hemi. I run a slightly trimmed 4.0 fan shroud, 18” fan blade and a heavy duty Hemi fan clutch.

I can drive around all day, sit and idle as long as I want and and slow crawl.

It has has only gotten to 210° once, and that’s a day is was extremely hot and I sat quite a long time stuck in a slow slow crawling line.

I have had a Mopar 203° thermostat and a Mopar Hemi Dodge radiator cap (for correct psi) in it since I built the engine 12,000 miles ago.

https://cgj.com/product/jp-3010-jeep-radiator

Excellent! How does it do on the highway?
 
Ok, I've been reading and reading and reading, and I think I'm more confused than I was before. Kind of like knowing just enough to be dangerous......sometimes it's better to be clueless, maybe?

Between this thread and my suspension thread, I realized that I'm piecemealing my questions, and losing sight of the overall build, which I need to step back for a second and make sure I'm not spending bad resources (time, money, thought, stress) before spending good resources. Let me collect some thoughts:

What I need:

  1. Reliability - The most important thing it can do is start when I turn the key, and stay cool, even if it means not making it up whatever big bad obstacle is in its way.
  2. Driveability - Tons of off-road capability doesn't do me any good if it's a handful on the highway. It needs to do double duty, bit not just be "ok" at both, it needs to be good at both, not great at one, and mediocre on the other.

What I want:

  1. I want to run 35s. The wheelbase, breakover angle, capability, and not going to lie, looks....I think the LJ is "right" with 35s
  2. I want to regear for the 35s
  3. I want to freshen the current suspension, leading candidates are Currie short arm, and Savvy Mid-Arm
  4. I want better clearance in the belly area, as there is no free lunch with the gift of wheelbase

What is concerning me:

  1. Running 35s - I have no issue with the gearing and even beefing the drivetrain. But it's becoming very clear that simply making room for 35s is only the beginning.
    1. The most popular (arguably) formula of 4" suspension and 1.25" body lift seem simple enough, but now that there's a body lift, I'm tempted for a flat belly. Well, that's not so easy as it requires modifications that start to get the snowball rolling down the hill.
      1. There's no MM lift for the Hemi, but I have some wheelbase, is that going to be enough, or am I going to start down the path of nitpicky behaviors, which fly in the face of the two "needs" listed above?
      2. Maybe I use a skid similar to the tummy tucker on my short wheelbase (SWB) AEV Tj, which isn't pefectly flat, but it's pretty well tucked up, and pretty stout? Are there other options out there besides the now defunct Nth degree (UCF? Other>)? Do I steal it from my SWB, and potentially lessen the value of the sale of my SWB?
    2. Do I look for one of the lifts greater than 4" and forego the body lift? Well, those lifts are quite expensive, and seem to be geared towards offroad, which would take away from the "driveability" bullet above.....or would it?
    3. Cooling - The cooling issues are well addressed in this thread, but I am now realizing it's not a simple answer. Am I going to run a flat belly? Am I going to run a body lift? Am I going to raise the drivetrain, am I going to throw in the towel and just run 33s?
      1. Electric fan will accommodate angles, raising/not raising the drivetrain, etc. but:
        1. AEV swears by the mechanical fan setup, with OEM TJ shroud on a custom radiator, with the OEM fan and clutch.....but they didn't run body lifts, even on their 35" tired builds
        2. AMW's current swap kit uses electric
        3. Many current and defunct "kits" out there use(d) electric fans....was that out of convenience or performance?
        4. Daubie's hemi swap, which is as clean and "OEM like" as could be possible seems to be running all OEM cooling components, with mechanical fan and he has ZERO cooling issues. However, I don't believe he's running extensive suspension or body lift?

You'll notice I only have one primary bullet under "concerns" as it all stems from wanting to run 35s. If I was simply going to run 33s, I'd just replace the radiator and run the current Spal until it fails, and then address it then. However, if I go that route, will I always be saying "I should have just bit the bullet?"

As you can see......my head's spinning, and that's with having received tons of excellent of advice on these threads. Big picture is the key.....is the status quo good enough? If not, then I should endeavor to do this once, and do it right.
 
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Ok, I've been reading and reading and reading, and I think I'm more confused than I was before. Kind of like knowing just enough to be dangerous......sometimes it's better to be clueless, maybe?

Between this thread and my suspension thread, I realized that I'm piecemealing my questions, and losing sight of the overall build, which I need to step back for a second and make sure I'm not spending bad resources (time, money, thought, stress) before spending good resources. Let me collect some thoughts:

What I need:

  1. Reliability - The most important thing it can do is start when I turn the key, and stay cool, even if it means not making it up whatever big bad obstacle is in its way.
  2. Driveability - Tons of off-road capability doesn't do me any good if it's a handful on the highway. It needs to do double duty, bit not just be "ok" at both, it needs to be good at both, not great at one, and mediocre on the other.

What I want:

  1. I want to run 35s. The wheelbase, breakover angle, capability, and not going to lie, looks....I think the LJ is "right" with 35s
  2. I want to regear for the 35s
  3. I want to freshen the current suspension, leading candidates are Currie short arm, and Savvy Mid-Arm
  4. I want better clearance in the belly area, as there is no free lunch with the gift of wheelbase

What is concerning me:

  1. Running 35s - I have no issue with the gearing and even beefing the drivetrain. But it's becoming very clear that simply making room for 35s is only the beginning.
    1. The most popular (arguably) formula of 4" suspension and 1.25" body lift seem simple enough, but now that there's a body lift, I'm tempted for a flat belly. Well, that's not so easy as it requires modifications that start to get the snowball rolling down the hill.
      1. There's no MM lift for the Hemi, but I have some wheelbase, is that going to be enough, or am I going to start down the path of nitpicky behaviors, which fly in the face of the two "needs" listed above?
      2. Maybe I use a skid similar to the tummy tucker on my short wheelbase (SWB) AEV Tj, which isn't pefectly flat, but it's pretty well tucked up, and pretty stout? Are there other options out there besides the now defunct Nth degree (UCF? Other>)? Do I steal it from my SWB, and potentially lessen the value of the sale of my SWB?
    2. Do I look for one of the lifts greater than 4" and forego the body lift? Well, those lifts are quite expensive, and seem to be geared towards offroad, which would take away from the "driveability" bullet above.....or would it?
    3. Cooling - The cooling issues are well addressed in this thread, but I am now realizing it's not a simple answer. Am I going to run a flat belly? Am I going to run a body lift? Am I going to raise the drivetrain, am I going to throw in the towel and just run 33s?
      1. Electric fan will accommodate angles, raising/not raising the drivetrain, etc. but:
        1. AEV swears by the mechanical fan setup, with OEM TJ shroud on a custom radiator, with the OEM fan and clutch.....but they didn't run body lifts, even on their 35" tired builds
        2. AMW's current swap kit uses electric
        3. Many current and defunct "kits" out there use(d) electric fans....was that out of convenience or performance?
        4. Daubie's hemi swap, which is as clean and "OEM like" as could be possible seems to be running all OEM cooling components, with mechanical fan and he has ZERO cooling issues. However, I don't believe he's running extensive suspension or body lift?

You'll notice I only have one primary bullet under "concerns" as it all stems from wanting to run 35s. If I was simply going to run 33s, I'd just replace the radiator and run the current Spal until it fails, and then address it then. However, if I go that route, will I always be saying "I should have just bit the bullet?"

As you can see......my head's spinning, and that's with having received tons of excellent of advice on these threads. Big picture is the key.....is the status quo good enough? If not, then I should endeavor to do this once, and do it right.

On the LJ, at 4" you are likely good without the MML. Don't be afraid of the body lift, and use it to do the tummy tuck - with the separate tranny mount.

Which tranny are you running? That matters for the tummy tuck with the Hemi.

Which SPAL fan are you running? I run the brushless 500 watt version in front of a mill which puts out a bunch more heat than your Hemi, and it works well. But, I've gone through two previous efans to get here.

Hang in there, and don't get flustered. We can help guide you to a good plan.
 
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On the LJ, at 4" you are likely good without the MML. Don't be afraid of the body lift, and use it to do the tummy tuck - with the separate tranny mount.

Which tranny are you running? That matters for the tummy tuck with the Hemi.

Which SPAL fan are you running? I run the brushless 500 watt version in front of a mill which puts out a bunch more heat than your Hemi, and it works well. But, I've gone through two previous efans to get here.

Hang in there, and don't get flustered. We can help guide you to a good plan.

Fingers crossed!!

The Jeep has the 545RFE transmission.

Not sure, all I have to go on is the pic posted earlier. The shop who installed the fan didn't have the info at the tip of their fingers, but I do know it wasn't the fan that AEV installed, and after a series of cooling issues, this is the setup that has had the least amount of issues for the owner. I'm happy using the current fan, but.....if grabbing the latest and greatest fan out there would give me peace of mind, then it is worth it's weight in gold.

Thank you! This forum has been great! I haven't frequented TJ forums in years....I was on RubiconOwnersForum years ago, but once the Jeep was acquired, I moved back to the CJ forums, as the Rubicon was good to go. I'm glad to be back asking questions! The journey is part of the fun. It's amazing how many things that were considered the "go to" setup are now considered unnecessary, or even bad ideas. The industry has also changed a lot.....many brands have gone away, trends have come and gone, and maybe some have, or are showinng signs of circling back around, etc. One thing hasn't changed - being out on a trail with a good running Jeep and no access to work stuff.....that feeling will never change.
 
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Fingers crossed!!

The Jeep has the 545RFE transmission.

Not sure, all I have to go on is the pic posted earlier. The shop who installed the fan didn't have the info at the tip of their fingers, but I do know it wasn't the fan that AEV installed, and after a series of cooling issues, this is the setup that has had the least amount of issues for the owner. I'm happy using the current fan, but.....if grabbing the latest and greatest fan out there would give me peace of mind, then it is worth it's weight in gold.

Thank you! This forum has been great! I haven't frequented TJ forums in years....I was on RubiconOwnersForum years ago, but once the Jeep was acquired, I moved back to the CJ forums, as the Rubicon was good to go. I'm glad to be back asking questions! The journey is part of the fun. It's amazing how many things that were considered the "go to" setup are now considered unnecessary, or even bad ideas. The industry has also changed a lot.....many brands have gone away, trends have come and gone, and maybe some have, or are showinng signs of circling back around, etc. One thing hasn't changed - being out on a trail with a good running Jeep and no access to work stuff.....that feeling will never change.

At least in my case, I run a 4 speed Atlas clocked flat, and above the frame rails, but I can't run a flat belly skid because the 545RFE pan drops down too far. Just check that before you look at a flat belly pan.

Post up a good picture of the fan - we may be able to identify it.
 
Novak Conversions Jeep Wrangler TJ engine mounts