After breaking off a nipple on my stock radiator, it’s clearly time for an upgrade. After some research it seems that a 2 pass Koyo Radiator should be great, though I was a little apprehensive because of all the comments about it not cooling correctly at idle. Well, it does. In fact, I’m pretty sure a lot of these comments are related to the gap that surrounds the fan shrouds which need to be filled in for it to actually pull air through the radiator instead of simply going around it. I live in Las Vegas and the Rx8 Koyo radiator allows me to sit in traffic in 110 degree weather with the A/C working and my Rx8 does not overheat.
Sorry about the picture quality, I replaced my camera soon after this after seeing just how bad the pictures came out.
Now for some pictures!
Showing the 1/4" gap between the fan shroud and radiator
Applying foam to seal the gap between the Rx8 Koyo radiator and fan shrouds
Testing different foam options
Sealed the gap
Stock foam not holding up so well
Selection of various foam tapes
Getting that tight seal
Looking good
She's pretty
Pipe foam to fill the gaps down below
More pipe foam around the radiator
Racing Beat Rx8 Silicone hoses installed
Another view of the Racing Beat Rx8 Silicone Hoses installed
Battery tray back in
An actual non blurry version of the battery tray going in
New coolant line from a local Mazda dealer
Battery and intake tray installed
Don't forget to hook up that power steering
Extended coolant overflow line so it doesn't dump onto the Power Steering connections
