radiator

Max777 · 09-09-2009, 11:47 PM

maybe twas because of the KOYO's higher capacity, but once I burped the system with the bleed screw on the upper radiator hose inlet, I didn't have a problem with it. MY biggest problem was mounting and getting it to bolt in, not air bubbles like I thought it would be.

A good trick is to take of the hose going to the Throttle Body from the rear iron, that lets the system expell most of the air and fill up better w/o having to burp the coolant as much.

N.RotaryTech · 09-16-2009, 08:48 AM

hey, I have a similar situation.

My S5 radiator is now leaking around the top passenger side of it.

Im thinking about my options.
1. Swap with S4 radiator. (I have one.)
2. Buy a new S5 radiator from a parts store like AdvancedAuto. (How much would this be?)
3. Upgrade to a koyo.

(I know this will be expensive.)

For now Im thinking of going with #1.

Ive looked over the differences, it would be a frankenstein system but I think it might work.
But I wouldn't have a cap at all.

My S4 radiator doesn't come with a cap. It dose have a sensor and overflow tube coming out from the top thats unscrew-able. That would be my point of fill up. I would also fill it up by taking off the upper hose at the thermostat, just to be sure. Ill still have the S5 overflow tank.

Think that might work until I get another S5 radiator?

Will not having a cap be such a problem? lol.

09-16-2009, 08:48 AM	#2
N.RotaryTech Home-brew Rotary Join Date: Feb 2008 Location: GooseCreek SC Posts: 552 Rep Power: 18	My S5 radiator is leaking! hey, I have a similar situation. My S5 radiator is now leaking around the top passenger side of it. Im thinking about my options. 1. Swap with S4 radiator. (I have one.) 2. Buy a new S5 radiator from a parts store like AdvancedAuto. (How much would this be?) 3. Upgrade to a koyo. (I know this will be expensive.) For now Im thinking of going with #1. Ive looked over the differences, it would be a frankenstein system but I think it might work. But I wouldn't have a cap at all. My S4 radiator doesn't come with a cap. It dose have a sensor and overflow tube coming out from the top thats unscrew-able. That would be my point of fill up. I would also fill it up by taking off the upper hose at the thermostat, just to be sure. Ill still have the S5 overflow tank. Think that might work until I get another S5 radiator? Will not having a cap be such a problem? lol. __________________ '89 RX7 GTU, half-Bridge-port S4/S5 NA, E6K, Full RB exhaust, weekend warrior. '83 RX7, The "this might take awhile" project. '87 RX7 GXL, Rest In Pieces. '98 Subaru Impreza Outback-sport, rx7 rescue vehicle, down for repair. '94 Ford Ranger, daily.

09-09-2009, 11:47 PM	#1
Max777 Pirate Join Date: Mar 2008 Location: Central IL Posts: 1,323 Rep Power: 19	maybe twas because of the KOYO's higher capacity, but once I burped the system with the bleed screw on the upper radiator hose inlet, I didn't have a problem with it. MY biggest problem was mounting and getting it to bolt in, not air bubbles like I thought it would be. A good trick is to take of the hose going to the Throttle Body from the rear iron, that lets the system expell most of the air and fill up better w/o having to burp the coolant as much. __________________ Rotaries:They are NOT that complicated!