Koyo radiator mystery port
 

To those with Koyo radiators... Is the port on the driver side of the radiator a 1/8 PT port? I asked this over at the rallysportdirect website and they confirmed that it is indeed 1/8 PT. But when I tried comparing the size of this port on my Koyo radiator to the stock oil pressure and temp sensors, it seems smaller. Has anyone successfully tapped a water temp sensor to this spot?


Here it is on the upper left
http://ft86speedfactory.com/images/Koyo-4.JPG

interesting. I have the same radiator sitting in my garage and will soon be installed on my car.

How hard was the install? Anything worth mentioning about the install?

It was a total PITA since I have a Vortech supercharger. I had to remove the blower. Hardest part was getting the belt back in.

On a NA car, it should be a breeze to install once the bumper is off. The drain cock on my Koyo wasn't tight, so make sure you check that out. I was also able to install it without jacking up the car or removing the metal skid plate under the engine. The drain cock on the stock radiator will be accessible with the bumper off.

Let us know if you can take a peek at that port and confirm that it is 1/8 PT. I've already spent a good amount of time bleeding the system, so I'm hesitant to remove the port and check :)

Oh I sure will,

I plan to install the radiator with Kraftwerks kit and clamp hoses to prevent boost leaks (under the intake manifold) since I will need to remove the bumper for the KW kit anyways I figured it'd be time saving that way.

Thanks again for all the useful hints :thumbsup:

1/8 NPT would be the logical size

I doubt it's 1/8 NPT because all the other Koyo radiators with water temp sensor ports use 1/8 PT.

Koyo's website doesn't list this radiator as having a 1/8 PT port. Maybe because it's a running change? The earlier ones don't have this port.

No problem! When I clamped the hoses under the manifold, I had to move the AC compressor and the throttle body out of the way. Good luck with the install :thumbsup:

Ok, I installed my KoyoRad this past weekend and I took a closer look of the bolts you are referring to

First of all, I don't think the above picture is FRS/BRZ specific radiator but it's just a generic photo since the placements of those bolts are different.

and Secondly, those are not ports just the tabs since the OEM unit has unique tab that can go over the hanger/attachment part of the body, aftermarket radiator include adjustable length bolts so that you can hang the radiator..

Take a closer look and you will notice that the thread is just empty :)
https://lh5.googleusercontent.com/-D...504_121311.jpg

The photo in my original post is not a generic photo. It looks exactly like mine. I'm not talking about the four "tabs" that the stock fan bolts into. I'm referring to the port that is on the upper left of the radiator, driver side when mounted to the car. This port is not on the first batch of Koyo radiators. Here is a photo of my radiator before I put it in the car. You can see the port on the upper left.

http://i374.photobucket.com/albums/o...ps48c2c8b3.jpg

I've been looking at the port and I don't think it's empty. The fact that it is plugged by an allen grub screw wrapped it teflon tape, tells me that there is indeed a hole in there :)

Garagefrs' koyo radiator install... No port on the left side
http://i374.photobucket.com/albums/o...pse5b75228.jpg

I have the port on mine and it seeps, pisses me off.

interesting, mine obviously doesn't have this port so maybe it's because it's one of the earlier productions..:iono:

I have noticed that I have the same port on the upper left side. Obviously, I didn't pay attention to that when I first looked at it but rather looking at the tabs, oh well..so far no leaking issue and whatnot