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09-11 Mazda RX8 radiator is here!
Friday, March 15, 2013
Koyorad | Koyo is proud to introduce a performance replacement all aluminum radiator for the 2009-2011 Mazda RX-8 1.3L MT. This brand new application features Koyorad's new 48mm “HH” Series radiator core to maximize heat transfer. Koyo designs and manufactures each radiator with precision; therefore this is a direct-fit performance replacement for the stock OE Plastic / Aluminum radiator and bolts directly to the factory fan shroud for a quick and simple installation. Koyo has also integrated a 1/8” NPT female accessory fitting (supplied with a threaded plug) to accept temperature sensors typically included with aftermarket temperature gauges.
Koyorad quality is a direct result of their privately owned factories which allow Koyorad Japan to oversee each stage of radiator production. This ensures that quality is never sacrificed for quantity. Each Koyo all aluminum radiator core is hand assembled, Nocolok brazed, then TIG welded by hand with the finest aluminum available. These are just a few characteristics that have earned Koyorad Radiators their excellent reputation in performance radiators worldwide.
Application: 2009-2011 Mazda RX-8 1.3L
Koyorad | Koyo Part Number #: HH062267
(04-08 Models, use part# V2695)
Contact: info@koyoradracing.com
Available: Now
Features
• Koyorad “HH” Series 48mm Core
• OE Specific mounting and direct fit
• Mirror polished finish
• Nocolok-R Brazing
• Precise Tube and Fin alignment
• Billet aluminum filler neck
• 1/8” NPT female accessory fitting
I know that the V series is supposed to be an OEM replacement, but looks like the HH series is geared for performance. Larger than the stock 36mm RX8 S2 radiators.
Has anyone here tried this radiator? How was the fit?
I need to replace my radiator and I'm looking for something that will cool better than the original, since my car has been running warm in the summer here in Texas.
Update: I bought one and it fit fine. No problems installing it.
Did it fix your overheating issues? Worth the money?
Sorry, didn't see this before.
It's hard to say if it helped with the cooling. Before I installed the Koyo radiator, the car would spit coolant out of the overflow on hot days. When I installed the new radiator, I saw that the fins on the oil coolers were all bent, so I straightened them. Since then, I haven't noticed any coolant coming out of the overflow. The coolant still hits 210-215 degrees in rush hour traffic.
So, I can't say how much the radiator helped, but it didn't make things worse at least.
bump, looking for info/confirmation on the core change of the S2 radiator and this was the only thing I've found. The actual core thickness on the S1 is 25mm. The header tanks are about 1/2" wider, so looking to confirm the actual core width, length, and thickness on the S2 ...
bump, looking for info/confirmation on the core change of the S2 radiator and this was the only thing I've found. The actual core thickness on the S1 is 25mm. The header tanks are about 1/2" wider, so looking to confirm the actual core width, length, and thickness on the S2 ...
FYI, looking back at this im not sure where i got my 36mm number from, but im going to go out on a limb that its probably 25mm like the S1. Based on the service highlights, they talk about some minor improvements to the cooling system, but nothing about an increased core size (capacity is increased 0.2L)
Mark,
As I said to you in PM I have a brand new OEM S2 MT Radiator here, but it is well packed and boxed away in storage, I can get it out with some frustration if you really want profile measurements.
Here is a pic of a damaged one (I no longer possess), sorry no profile (side on ) pics.
Hmm, I actually forgot to order the S1 yesterday. It doesn't seem to have changed the volume much. Want to sell your used OE S2 radiator? The Koyo fits fine (see post# 4).
Hmm, I actually forgot to order the S1 yesterday. It doesn't seem to have changed the volume much. Want to sell your used OE S2 radiator? The Koyo fits fine (see post# 4).
.
Sorry, I accidentally cracked the bottom of mine, it's toast :-(
EDIT: perhaps qtipconnoisseur can sell you his
Last edited by blu3dragon; 04-14-2015 at 11:03 AM.
no problem, I ordered an OEM replacement S2 manual trans radiator from Rock Auto today instead today. It was quite a bit less than my discounted S1 radiator from Mazda.
Since I'm not planning to use the OE fan/shroud I'm thinking (hoping/praying?) it won't have a fitment problem in my S1 ...
S2 OE replacement vs OE S1 radiator below. I only see three differences
1. S1 radiator is 27mm thick, S2 is 36mm thick
2. Lower mount posts have an extra extension length on them. Not sure if this on the factory radiator or not, but they would protrude below the car on my S1 so I'll just trim them off. Doesn't affect anything. EDIT: no issue at all, use as-is without modification.
3. The RH upper bolt-on point for the fan shroud housing was moved out from near the radiator inlet neck to the outer corner just like on the LH side. Not sure why the S1 had this shroud mounting point located away from the corner. Makes more sense where it is on the S2. I think you could make a metal bracket to extend over and use the S1 fan housing if putting this radiator in an S1 chassis.
I won't be using the OE fan/shroud assembly so no impact on me. Still can't get over how light this radiator is for the size ...
S2 OE replacement vs OE S1 radiator below. I only see three differences
1. S1 radiator is 27mm thick, S2 is 36mm thick
2. Lower mount posts have an extra extension length on them. Not sure if this on the factory radiator or not (yes confirmed), but they would protrude below the car on my S1 so I'll just trim them off. Doesn't affect anything. Ah see my pic above and genuine OE N3R1-15-200B S2 6MT Radiator and longer bottom pins....
3. The RH upper bolt-on point for the fan shroud housing was moved out from near the radiator inlet neck to the outer corner just like on the LH side. Not sure why the S1 had this shroud mounting point located away from the corner. Makes more sense where it is on the S2. I think you could make a metal bracket to extend over and use the S1 fan housing if putting this radiator in an S1 chassis.
I won't be using the OE fan/shroud assembly so no impact on me. Still can't get over how light this radiator is for the size ...Yeah agree, I cant understand Mazda how they would engineer such a light core, like the FD had the thicker unit.
You ought to see the NC Radiator I have, no thicker than 20-25 mm!
S2 on the LH side, S1 on the RH side
.
Just in case you forgot your spectacle's..........
well this old fart was up all night under an RX8, so I didn't think to go back and look at that pic
Didn't come with any foam strips either (you can see where I pulled them off the S1 radiator, the self-adhesive tape lines), but I don't need those
No foam strips!, cheap skates, that's why you pay more for genuine (inferior) Mazda Parts with the foam strips included in their over inflated price.
Pay attention next time you old dog.
Looks like I will be the next guinea pig trying this radiator. I discovered a pin hole leak on the bottom of mine yesterday. TH Motorsports has it for $314 with free shipping, so I guess that is what I will be doing.
I'll report back as to whether I see any improvement in a few weeks. Not expecting miracles.
Last edited by Steve Dallas; 06-02-2015 at 04:15 PM.
04-22-2013, 08:07 PM
