Radiator Recommendation in 2025

[John Cooper]

I had my top tank replaced on my OEM by a trusted radiator shop local to me. Never had an issue with anything they have ever done for me before.

I do have a KoyoRad as a back up just incase the OEM goes down again. Bought it through 1 800 radiator local and it has a lifetime warranty also.

 

[chili_pepper]

The aftermarket Radiator units don't seem to differentiate between Auto or Manual application

I think that's because they all have transmission coolers built in, you just don't use the connections if you've got a manual. At least that's how it was with the Denso I used.

 

[Spike Strip]

Anyone used the crown automotive radiator?

 

[Link]

I have a 2005 4.0 RME Manual. The aftermarket Radiator units don't seem to differentiate between Auto or Manual application, but the OE Mopar does, so I'm guessing the difference is all the aftermarket have the integral auto Transmission fluid cooler that's just not used if you have a MT ?

FWIW, Denso is a Toyota OEM but not for Land Cruisers. They use ToyoRad, also Japanese made, at least for the 40, 60, 70, 80, through the 100 series. Don't know about later... Anyone used the Koyorad listed on Rockauto?

Don't have a radiator issue now, but just looking for more parts to hoard.

I have a manual but a Denso auto radiator. Would have preferred a manual transmission radiator due to fewer failure points but couldn’t find one. Hasn’t caused any issues.

 

[Link]

Anyone used the crown automotive radiator?

Got a link?

 

[SkylinesSuck]

Just make sure it's made in Japan.

My kids were. Giggitty.

Domo arigato

どういたしまして


I second Denso. They are OEM for Toyota, Nissan, and probably everybody else over there too. If it's made there and not Jyna, I'd consider it solid

 

[SRCustom]

I would strongly recommend the CSF 2578. it is made entirely of copper and brass, so it can be trail repaired easily.

Ive been running it for over a year and it's been great. around 200 bucks on rockauto ROCK AUTO CSF 2578

From the link you posted...

• "Tanks are made from Virgin Grade Engineered plastic resins, which are "Glass Filled" for added Strength & Durability"

??? ...I want to believe....

 

[MaxNard]

I went with a CSF OE Replacement Radiator from extremeterrain for $105 almost a year ago when I replaced my entire cooling system. Looked and fit exactly like the original I pulled out (which was clogged up). No issues since.

My TJ's been my DD commuter for the last couple of years (putting almost 100 miles a day on it).

 

[KennethS]

The aftermarket Radiator units don't seem to differentiate between Auto or Manual application, but the OE Mopar does, so I'm guessing the difference is all the aftermarket have the integral auto Transmission fluid cooler that's just not used if you have a MT ?

That is correct. Parts consolidation to reduce manufacturing and stock base costs.

 

[cb4017]

When I installed the A/T Denso in my M/T Jeep, I just left the black plastic plugs in the transmission cooler ports.

 

[Link]

From the link you posted...

• "Tanks are made from Virgin Grade Engineered plastic resins, which are "Glass Filled" for added Strength & Durability"

??? ...I want to believe....

Believe that’s a generic description. Look at the pic and the materials description.

Here’s another link for the same model number

https://radiatornow.com/products/2003-jeep-wrangler-4-0-l-csf2578-radiator

 

[Spike Strip]

Got a link?

https://www.crownautomotive.net/Radiator/52080183.html

 

[Link]

https://www.crownautomotive.net/Radiator/52080183.html

I’d guess probably fine but I’ve never used one of their radiators. I’ve had good luck with Denso radiators in multiple vehicles so that’s what I stick with

 

[Spike Strip]

Denso is certainly good. As I posted earlier, KoyoRad is Toyota Land Cruiser OEM. I've had good luck and liked the quality of the all brass CSFs I've put in my Land Cruisers, so I will probably do a little more research, as well as hunting for an OE Mopar 55037652AA that may be lurking in someone's closet then go with one of those aftermarket if the Mopar hunt is futile.

Anyone happen to know who the MOPAR OEM was ?

 

[Daryl]

Anyone happen to know who the MOPAR OEM was ?

I believe it was Valeo Service.

 

[Sam410]

From the link you posted...

• "Tanks are made from Virgin Grade Engineered plastic resins, which are "Glass Filled" for added Strength & Durability"

??? ...I want to believe...

I double checked, that is the wrong description. the specs to the left say copper and brass.


Summit confirms it: https://www.summitracing.com/parts/csf-2578

 

[Spike Strip]

What changes, if any

I would strongly recommend the CSF 2578. it is made entirely of copper and brass, so it can be trail repaired easily.

Ive been running it for over a year and it's been great. around 200 bucks on rockauto ROCK AUTO CSF 2578

Both CSF and RockAuto list this up to 2004 4.0L

Anyone know how the '05 and '06 radiators differ (if any) ?

 

[Link]

What changes, if any



Both CSF and RockAuto list this up to 2004 4.0L

Anyone know how the '05 and '06 radiators differ (if any) ?

The radiators are the same dimensions and will bolt in correctly. I don’t know if the all metal one is better but the majority of our plastic tank radiators split the plastic tanks so theoretically it should last longer. The negative I see is the metal tank on top might be easier to damage when you are working on the Jeep.

Some other poster on here talked about having that same CSF all metal radiator in his Jeep but I can’t remember who it was.

 

[MikeE024]

@OkieJoe can run a proven 01-04 Mopar unit and simply cover the transcooler ports since he has a manual. I have one of these as a spare for my 2005.

For auto folks, the 05/06 unit has ports with spring clips for retaining the connectors, while the 01-04 has barb fittings.

 

[Spike Strip]

Ah, ok. Change was in the quick connect vs straight hose.... Thanks