Scubaboo Posted October 17, 2018 Share Posted October 17, 2018 (edited) Thanks to BBPeiks' STI Radiator install thread and everyone who shared their experiences there, we know what to watch out for to fit bigger radiators into out 5th gen GT's. With the info in that thread as a reference point, I started looking at the local market to see what I could use for my 2010 GT (which in this area is identical to the USDM models). Initially I was going to go with an STI rad. But after talking to the local source and discussing what I was looking for, specifically: -Top tank shape and inlet/outlet position -No turbo coolant line (the fitting at the top tank passenger side that needed to be plugged on the STI rads) -No ATF heat exchanger in the lower tank -Not too thick, but of course thicker than stock (16mm) He suggested an NA application MT radiator that he had. So here are the details on the box. Listed to fit 2010 Foresters, but lo and behold, it's actually marked by the manufacturer to fit our cars too! It has all the tabs an the right places as you can see. Maybe if you search the model number on ebay it might come up. Edited October 21, 2018 by Scubaboo Add link to original STI rad install thread Link to comment Share on other sites More sharing options...
Scubaboo Posted October 17, 2018 Author Share Posted October 17, 2018 Here are a couple of comparison shots. It is 26mm thick vs 16mm for the stocker. A very minor difference is the drain location. The all aluminum rad has the plug at end, while the OE rad has the drain in line with what is about the center of the passenger side fan. The different drain location didnt hit anything thankfully. Everything mounted on the rad and ready to install Link to comment Share on other sites More sharing options...
Scubaboo Posted October 17, 2018 Author Share Posted October 17, 2018 I did the thermostat while the rad was out. Here are some comparison shots of the original 'stat (84 deg) and the new OE STI 78 deg 'stat (21200AA072). They are pretty much identical. Dont forget to put on a new gasket (21236AA010), the old one looked pretty worn. Rad installed, lots of clearance with no mods at all, it was a drop-in fit. Link to comment Share on other sites More sharing options...
Scubaboo Posted October 21, 2018 Author Share Posted October 21, 2018 I've only been able to take it out twice since install but there are definite improvements. The early open thermostat results in a movement in usual temp range from 89c-92c to 84c-92c. On the highway temps would peak at 99c or so with aggressive driving, lately I would only get up to 96c. The differences dont look to be so big, but it tends to stay lower in general, it is much more reluctant to go up to those lower peak temps. I can imagine shifting the entire range down if the cooling fan operation is tuned to the better rad and lower stat. I am actually concerned its a bit too cool lol! But I expect that when the power mods get installed the newfound cooling system headroom will be useful. And I hope the lower coolant temps are also translating to lower 5EAT temps. I really need to get more gauges on lol! I was concerned this thinner rad would not cool enough to be worthwhile but I am happy with it. I would not hesitate to recommend this size rad as an option for those who cant or dont want to mod for the higher performance STI rad. Link to comment Share on other sites More sharing options...
s2baru Posted October 24, 2018 Share Posted October 24, 2018 Thank you for sharing! What would you think be the disadvantages of the 78 deg thermostat? Link to comment Share on other sites More sharing options...
11boostedgt Posted October 24, 2018 Share Posted October 24, 2018 Wouldn’t mind finding this rad !! Link to comment Share on other sites More sharing options...
FLlegacy Posted October 24, 2018 Share Posted October 24, 2018 https://www.ebay.com/p/Impreza-WRX-Radiator-With-Fan-Shroud-for-Subaru-H4-2-5-08-14-Aluminum-2row-13091/1837299648?iid=261199449350&chn=ps That looks like it, but the part numbers don't match. Link to comment Share on other sites More sharing options...
Scubaboo Posted October 24, 2018 Author Share Posted October 24, 2018 (edited) Thank you for sharing! What would you think be the disadvantages of the 78 deg thermostat? You're welcome, just trying to contribute what I can after all the knowledge I get from fellow enthusiasts like you and the rest of the community. I am mainly concerned that the engine will not get the oil hot enough to boil off condensation in day to day driving. No basis for that thought yet though, just that temps are generally lower overall. I hope to get my oil temp and pressure gauges installed soon to find out. Edited October 24, 2018 by Scubaboo Link to comment Share on other sites More sharing options...
Scubaboo Posted October 24, 2018 Author Share Posted October 24, 2018 https://www.ebay.com/p/Impreza-WRX-Radiator-With-Fan-Shroud-for-Subaru-H4-2-5-08-14-Aluminum-2row-13091/1837299648?iid=261199449350&chn=ps That looks like it, but the part numbers don't match. I dont think that's the same, it looks to have the water fitting at the right passenger side top tank? Link to comment Share on other sites More sharing options...
FLlegacy Posted October 24, 2018 Share Posted October 24, 2018 I dont think that's the same, it looks to have the water fitting at the right passenger side top tank? I'm not sure what you are talking about? Link to comment Share on other sites More sharing options...
Scubaboo Posted October 24, 2018 Author Share Posted October 24, 2018 I'm not sure what you are talking about? It looks to have the extra hose barb that will need to be plugged, just like the STI rads. The rad I used is blank in that area. Link to comment Share on other sites More sharing options...
s2baru Posted November 14, 2018 Share Posted November 14, 2018 https://www.rallysportdirect.com/part/radiators/7042o-csf-racing-radiator-w-built-in-oil-cooler-and-thermostatic-sandwich-plate?gclid=CjwKCAiAiarfBRASEiwAw1tYv2wFGNH_AW1LPpvq-yb4iatdl5pFvbFh608cfkxvfQRf1bgJthypkBoCduoQAvD_BwE Little something I stumbled acorss the other day. No idea on fitment or even being worth it. Worth a share though Link to comment Share on other sites More sharing options...
Scubaboo Posted November 14, 2018 Author Share Posted November 14, 2018 ^looks thicc! It kinda looks basically like an STI AT rad that comes with a sandwich plate? It has that extra turbo water line fitting at the right side of the top tank too, that would need to be plugged. Nice marketing on CSF's part, our market cars dont have an oil cooler so an AT version of my rad would be an easy way to get an oil cooler on. Link to comment Share on other sites More sharing options...
Sarang Posted November 14, 2018 Share Posted November 14, 2018 My USDM came with a factory oil cooler. I think that would be pretty hard to fit because of how thick it is. I did consider it back when I got my Mishimoto rad tho. Link to comment Share on other sites More sharing options...
Scubaboo Posted November 15, 2018 Author Share Posted November 15, 2018 Yeah, you guys are lucky you have those coolers standard. I dont see that being too popular since US cars all have coolers already. Link to comment Share on other sites More sharing options...
BBPeik Posted November 15, 2018 Share Posted November 15, 2018 Awesome find. Thanks for letting everyone know My someday I will be done with it thread. Link to comment Share on other sites More sharing options...
Scubaboo Posted November 15, 2018 Author Share Posted November 15, 2018 Awesome find. Thanks for letting everyone know Least I could do after all the help I get here. Thanks for posting your own experience, inavluable to those of us who did it too. Link to comment Share on other sites More sharing options...
ICE7 Posted October 5, 2019 Share Posted October 5, 2019 Thanks to BBPeiks' STI Radiator install thread and everyone who shared their experiences there, we know what to watch out for to fit bigger radiators into out 5th gen GT's. With the info in that thread as a reference point, I started looking at the local market to see what I could use for my 2010 GT (which in this area is identical to the USDM models). Initially I was going to go with an STI rad. But after talking to the local source and discussing what I was looking for, specifically: -Top tank shape and inlet/outlet position -No turbo coolant line (the fitting at the top tank passenger side that needed to be plugged on the STI rads) -No ATF heat exchanger in the lower tank -Not too thick, but of course thicker than stock (16mm) He suggested an NA application MT radiator that he had. So here are the details on the box. Listed to fit 2010 Foresters, but lo and behold, it's actually marked by the manufacturer to fit our cars too! It has all the tabs an the right places as you can see. Maybe if you search the model number on ebay it might come up. Hi, good day...is it possible for you to forward me a link to purchase one of these radiator for my 2010 legacy also, if possible. Thanks in advance. Link to comment Share on other sites More sharing options...
Scubaboo Posted October 6, 2019 Author Share Posted October 6, 2019 Hi! A few members have asked about this and I put them in touch with the guy I got it from. He is willing to work with them but shipping comes out to be very expensive and ultimately nobody pushed through with it. It would be cheaper to do the STI rad swap. If you are still interested let me know and I'll get you his contact details. Link to comment Share on other sites More sharing options...
Zee199969 Posted October 7, 2019 Share Posted October 7, 2019 Hi! A few members have asked about this and I put them in touch with the guy I got it from. He is willing to work with them but shipping comes out to be very expensive and ultimately nobody pushed through with it. It would be cheaper to do the STI rad swap. If you are still interested let me know and I'll get you his contact details.A 2015+ WRX radiator will work for us since they also don't have the extra hose that the STIs do. I have the Koyorad VH091662. It's a drop in plug and play. Another FB 5th gen owner installed a CSF radiator for the 08+ STi Sent from my ONEPLUS A5000 using Tapatalk My "Build" Link to comment Share on other sites More sharing options...
Scubaboo Posted October 8, 2019 Author Share Posted October 8, 2019 ^Thanks, nice to see more options for the 5th gen! Link to comment Share on other sites More sharing options...
Humble Rumble Posted October 8, 2019 Share Posted October 8, 2019 Wish there was a dang aluminum radiator option for the 3.6R with our dumb double upper hose setup. 2012 Legacy 3.6R Build Thread 5th Gen Legacy BM/BR Body Kit Compendium Thread Link to comment Share on other sites More sharing options...
Zee199969 Posted October 8, 2019 Share Posted October 8, 2019 ^Thanks, nice to see more options for the 5th gen!Yea, thankfully the 2015+ WRX shares more than a couple parts with our gen Sent from my ONEPLUS A5000 using Tapatalk My "Build" Link to comment Share on other sites More sharing options...
FLlegacy Posted October 8, 2019 Share Posted October 8, 2019 Wish there was a dang aluminum radiator option for the 3.6R with our dumb double upper hose setup. Are you over heating? Sent from my SM-G965U using Tapatalk Link to comment Share on other sites More sharing options...
Humble Rumble Posted October 8, 2019 Share Posted October 8, 2019 Not currently but with track use, I'd like to have the piece of mind. 2012 Legacy 3.6R Build Thread 5th Gen Legacy BM/BR Body Kit Compendium Thread Link to comment Share on other sites More sharing options...
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