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Discussion Starter #1
Hey guys,
My cheap plastic tank radiator that was in my manual 03 X is shot and I was curious if I could upgrade to an all aluminum model made for the XT?

Also, follow up question.

The plastic and aluminum seem to have separated just enough at the top where they come together to allow coolant to seep out. Is there any other fix besides replacement?

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that seeping is pretty common. had to replace mine at 130k

Where r u located? I have a koyo rad hyperv for sale. and not willing to ship
 

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2007 Forester Sports XT 4EAT
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@Xuforez if you have an AT, you will need a radiator with a built in ATF cooler. :wink:

Also...
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Bobby...

['07 FSXT MODding Journal] ['03 X MODding Journal]
 

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Discussion Starter #6
Unfortunately I may have to go as budget as possible for the moment. The most I can do upgrade wise is likely full aluminum construction. Hoses etc will have to wait until I do a reliability rebuild this summer.


Also, thanks for putting this thread in the proper place.

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2007 FXT Limited 5 Speed Manual
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186 Posts
that seeping is pretty common. had to replace mine at 130k

Where r u located? I have a koyo rad hyperv for sale. and not willing to ship
I am looking to swap in a koyo aluminum this year. How much? New? Used? Condition? 93301 here.
 

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2007 FXT Limited 5 Speed Manual
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@frijoles Is it a vh13026? I'm not asking so you can ship it to me, I am only a couple hours away. I am wanting to install an aluminum radiator and am interested if it's a vh13026 and is in decent condition and you still want to sell it. Thanks.
 

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2008 Forester XT 5-Speed Manual
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The plastic and aluminum seem to have separated just enough at the top where they come together to allow coolant to seep out. Is there any other fix besides replacement
This seems like a bad idea to me. You’d be fxing it in one spot just so that it can fail in another. And if it fails before you notice it: you get to take on far more expensive repairs.
 

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Discussion Starter #11
Agreed, I purchased a new one, all aluminum.

This one does not have a cap, however. Anyone have any good tips on bleeding the air from the system? Apparently it would be easier if I had the XT, but being an NA I cannot see a high point where I can evacuate the air.

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2006 Forester X Prem 4EAT
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You can purchase a something like a Lisle 24680 funnel to burp the cooling system.

The turbo model radiators also have an extra outlet in the top left corner that needs to be plugged, as it is not used on the n/a engines. You can use 3/8" inner diameter bypass cap with a clamp for doing that.
 

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Discussion Starter #13
Good to know, I was planning on running my overflow time to that inlet.

Also, I think I need to clarify, not only does it not have a cap, it also does not have a fill port.

I was planning to use that other port to fill it then possibly to burp it before hooking it up to my overflow tank. I'm not sure that will work, however. Also not sure my system will maintain proper pressure that way. The listing indicated it came with a 1.1 bar cap, but it was apparently not the case.


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2005 Forester X auto
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I have the same issue with my 2005 X, this will be my 3rd radiator in about 30k miles. The first replacement lasted a month, the 2nd exactly a year today, now I am again leaking from the top tank between the plastic and aluminum crimp. I hate plastic radiators. Is an all aluminum radiator a direct drop in? if so, what part number? and do that sell one that has a radiator cap/fill hole built onto the radiator? dont know that I want to go without that. Thanks for any insight!
 

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Discussion Starter #15
Well, I had no issues installing the radiator I ordered, it was a perfect fit. However, once you eliminate that fill cap, you also have to procure an overflow tank like is required on the XT or else your system will not be pressurised, and the coolant will boil much too quickly. Fwiw I did not see any full aluminum radiators available that did have a fill cap. I'm currently limping around small trips until I get an expansion tank.

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2015 Forester 2.5i CVT
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that seeping is pretty common. had to replace mine at 130k
Yes unfortunately with plastic/metal radiators the gaskets start leaking and/or the plastic tanks crack...cheap junk.

oh yea thats right.
or you can add a side atf cooler
Usually better to have AT cooler inside radiator, this helps get fluids up to operating temps quickly and reduces moisture/condensation in the system, also keeps more stable operating temps, a properly sized system should be fine, but for heavy duty use an external can be added. Route to radiator built in cooler first, then auxiliary cooler and back to tranny.

I have the same issue with my 2005 X, this will be my 3rd radiator in about 30k miles. The first replacement lasted a month, the 2nd exactly a year today, now I am again leaking from the top tank between the plastic and aluminum crimp.
That can be a sign of bad head gaskets over pressurizing the radiator.

Well, I had no issues installing the radiator I ordered, it was a perfect fit. However, once you eliminate that fill cap, you also have to procure an overflow tank like is required on the XT or else your system will not be pressurised, and the coolant will boil much too quickly. Fwiw I did not see any full aluminum radiators available that did have a fill cap. I'm currently limping around small trips until I get an expansion tank.
Thanks for the update and as you said, no cap radiators are designed to use expansion tanks, update us when you get that installed. BTW that's a beautiful looking all aluminum radiator. :)
 

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Usually better to have AT cooler inside radiator, this helps get fluids up to operating temps quickly and reduces moisture/condensation in the system, also keeps more stable operating temps, a properly sized system should be fine, but for heavy duty use an external can be added. Route to radiator built in cooler first, then auxiliary cooler and back to tranny.
Thats good to know. Which makes perfect sense, and actually one reason why i delayed the install, and eventually trying to sell the unit.
 

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2006 Forester X Prem 4EAT
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Both Mishimoto and Koyo make an all aluminum radiator with a filler neck & cap.
 

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Discussion Starter #20
Both Mishimoto and Koyo make an all aluminum radiator with a filler neck & cap.
Good to know, although they are about three times the price of what I bought. After buying an expansion tank I'm getting pretty close though.

Tank arrives today, just gotta figure out how to mount it....

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