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4WDrift 06-27-2010 02:53 PM

Radiator install 03'
03' WRX sedan. What am I in for installing a new radiator? Is there a walkthrough anywhere that I can take a glance at? I think I cracked it from all the times I've leaned on the filler neck, the upper tank split in the front right next to where the prop-rod comes down. Any help would be appreciated.

Many thanks,

wagonracer 06-27-2010 03:56 PM

It's a pretty straightforward job.
Drain at petcock or large hose at water pump.
Remove air intake (if you still use the stock deal at edge of hood) and both the large hoses, upper and lower
Disconnect the two little lines on the passenger side.
Unclip the PS line (if you still have that).
Remove the two upper brackets.
Unclip both fan wiring connections.
Lift it carefully straight up off the pins. Wham, it's out !! Unbolt the fans, reservoir and metal line and mount those to your new radiator. Inspect all hoses before you reinstall them. Slap that sucker back in there, be sure to plug fans back in, fill it slowly while idling (with heat on). After it reaches op. temp and the thermostat opens it will drink more. Fill up the reservoir too, as it will draw from that too fill air gaps in the system.

Have fun

toekutter 09-28-2010 09:11 PM

My man! What are the odds, I'm searching on how to replace a radiator and there's your post on how to do it! :)
I think I am developing the same issues (leaks on top by the plastic/metal seam) so I'll be tackling this here pretty soon. Any recommendations for a replacement radiator? I'm reading that the OEMs suck (obviously), and since Koyo's seem pretty pricey, I'm thinking a nice Mishimoto might be the ticket?


RcrsWetDream 09-29-2010 08:36 AM

1 Attachment(s)
Mishimoto for a DD will be fine... I think Koyo has more rows, but mishimoto will still cool better than stock.

toekutter 09-29-2010 09:45 AM

Right on. Do you guys recommend replacing the hoses as well?

basco 09-29-2010 10:17 AM doesn't make sense to skip it

wagonracer 09-29-2010 07:20 PM

Hey Igor, glad to help (before you even needed it !) Those rims turned out pretty cool wit that hammered black paint. I just couldn't do the copper or brass.


toekutter 09-30-2010 10:22 AM

[quote=wagonracer;251271]Hey Igor, glad to help (before you even needed it !) Those rims turned out pretty cool wit that hammered black paint. I just couldn't do the copper or brass.


Right on, can't wait to see them! We should still hit the track one of these days...

subyrex03 11-27-2010 07:26 PM

Mishimoto radiator?
Just a quick question about the Mishimoto radiator inlet/outlet size. I just split open my plastic crap radiator after 7 yrs and 102k miles. I'm looking for a aluminum rad. I've been looking at the Koyo, Megan and Mishimoto. The only thing about the Mishi item is that it says that the inlet/outlets are 1.25" where both the Koyo and Megan say their are 1.49". Is the Mishimoto actually small diameter and require different hoses? They say that they are direct replacement! Anybody install one yet and if so did you have any problems? I like the Mishimoto more than the Megan just because of some bad luck with a set of headers in the past. Thanks

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