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Will a Evo VI Koyo radiator fit an Evo VIII-IX ?

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Old Sep 23, 2010, 07:24 AM
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Will a Evo VI Koyo radiator fit an Evo VIII-IX ?

I want to relocate my upper radiator hose b/c I am going to build upper mount turbo kit for this car but I don't want to modify a brand new koyo radiator

Plus it do not looks nice after you welded aluminum + it will cost time and money to modify it

And I see that Koyo radiator for EVO IV-V-VI look similar to EVO VII-VIII-IX version




I draw lines for comparison since drawings are out of scale [red lines do not match which is the length of the radiators do not match even if Evo IV-V-VI radiator only 10 MM longer]



My bet It will fit maybe I need to build extra lower hanger or upper radiator brackets

I guess following car is quipped with Evo IV-V-VI Koyo Radiator since it comes with Koyo logo on it + it has got large upper tank [Check the orange line] plus radiator cap is placed left side of the radiator





After a quick search [Yes I searched the forum first, I found this on google] I find this post;

This one is Mishimoto but since these radiators are OE replacement they need to be in same in size at least connections points needs to be same like radiator hose input and output


Originally Posted by motoxxx55
Evo 6 radiator & Ebay Evo 6 silicone hose on my Evo9. Everything fitted well except that I had to shorthen the top hose by about an inch.

For the record;

I. Evo VII-VIII-IX Radiator



II. Evo IV-VI-VI Radiator



Last edited by drahte1905; Sep 23, 2010 at 07:31 AM.
Old Sep 23, 2010, 07:38 AM
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Going custom top mount will involve some chopping and welding regardless, best bet is get the hard fab done with the radiator out. If you need to chop and weld the radiator man up. It's not gold plated!

Or get a buschur mini rad and sell the koyo
Old Sep 23, 2010, 07:42 AM
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pretty cool. im seriously gonna do this on day. cool info
Old Feb 18, 2011, 09:39 AM
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Yes the radiator should bolt right up ..
Old Feb 18, 2011, 10:09 AM
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i have a evo vi koyo rad in my ix, bolts rite in
Old Jan 10, 2012, 01:50 PM
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drahte1905 did you end up doing this? What upper hose did you use?
Old Jan 10, 2012, 02:28 PM
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Originally Posted by 10isace
drahte1905 did you end up doing this? What upper hose did you use?
I am using a half radiator right know but from what I read you will be fine with any OEM/Aftermarket Evo IV-VI radiator hose.

If you can source OEM/Aftermarket Evo IV-VI radiator hose than you may weld -12An radiator fittings to water neck and radiator to build your custom hose
Old Feb 1, 2012, 09:00 AM
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Originally Posted by drahte1905
I am using a half radiator right know but from what I read you will be fine with any OEM/Aftermarket Evo IV-VI radiator hose.

If you can source OEM/Aftermarket Evo IV-VI radiator hose than you may weld -12An radiator fittings to water neck and radiator to build your custom hose
I've also decided on the half radiator. Which did you decide on, Mishimoto, Koyo or civic radiator?
Old Feb 1, 2012, 12:07 PM
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Originally Posted by 10isace
I've also decided on the half radiator. Which did you decide on, Mishimoto, Koyo or civic radiator?
Right know I am using a Full-Blown Civic radiator but I will get a custom twin pass twin row radiator trough once I finish my build completely;

http://www.fsrproducts.com/radiators.html

I am doing this cuz I want to have the biggest radiator that I can fit the available space without blocking my FF turbo setup to maximize my cooling efficiency

Last edited by drahte1905; Feb 1, 2012 at 12:10 PM.
Old Feb 1, 2012, 12:30 PM
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Originally Posted by drahte1905
Right know I am using a Full-Blown Civic radiator but I will get a custom twin pass twin row radiator trough once I finish my build completely;

http://www.fsrproducts.com/radiators.html

I am doing this cuz I want to have the biggest radiator that I can fit the available space without blocking my FF turbo setup to maximize my cooling efficiency
The FSR Radiators are sick !!! Good luck with that! I assume you just give them the dimensions of say a Koyo 1/2 radiator and you're pretty much good to go? Of course add on some fittings.
Old Feb 1, 2012, 01:13 PM
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Originally Posted by 10isace
The FSR Radiators are sick !!! Good luck with that! I assume you just give them the dimensions of say a Koyo 1/2 radiator and you're pretty much good to go? Of course add on some fittings.
You should but since this is a custom order why not go taller and little wider...
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