Today I've noticed that my '03 EVO is leaking its green blood out of the top of the radiator. Unsure exactly where, but this green definitely should be inside, not outside.

I read all about these performance aftermarket radiators from $200 and up and how they give better cooling which in turn gives better performance ya da ya da ya da.

What is my incentive to "upgrading" if I've never gotten above 1/2 way up the dial? This includes track day in Lancaster on an uncomfortably warm day and stopped in traffic 1hr outside Las Vegas in July because a bridge jumped out of nowhere and took out a tractor trailer...

Why upgrade from stock if my car is cool?

 

because if you REALLY push your car... on a HOT day... it'll keep your motor cooler then the stock if you log it there are a couple threads out here i believe... since the design is very different...
at the same time... it's visually pleasing... plus less likely to have leaks unlike the stock one where the top and bottom plastic piece might crack such might be the car for you...

 

the thickness of aftermarket radiators helps with cooling of your engine and the fin design on some of them helps too. Thats the only difference performance wise.

 

Er...plastic piece? Now I've gotta take a look at that tomorrow when Mr. Sun gets up.

 

Cheese and crackers! $420 for cheap Murry's http://www.oreillyauto.com/site/c/se...cer&vi=1421446 or up to $1500 for ARC. Dealership is about $650.

 

I went with a new Mishimoto radiator last year after experiencing the very same separation of fin unit from top section that you describe.

I've noticed that the radiator fan now runs less. No real science test to back this up, but I'm convinced that the engine is now maintaining a more consistent temperature with the new radiator. Being in Arizona I consider that to be a good thing!

I also suggest replacing all of the cooling hoses - there are eight.

 

I'm more familiar with a $300 stone taking out my radiator core. This pooling at the top idea is rather new to me.

Perhaps it is time to change from plastic to aluminum?