7474 KOYO Radiator

Finally, 7474 radiator top cracked for the second time. I remember someone warned me from using the aftermarket radiator cap. I got no one to blame but me. I guess I was using the wrong radiator cap. From my observation, I noticed that in both cases I was using an after market radiator cap with 1.3 bar pressure whereby I should be using 0.9 or at least 1.1 bar.

The radiator cap is often overlooked in common engine overheating problems. Ralliart high performance radiator cap is designed to add pressure to the cooling system and increase the boiling point like grandma's pressure cooker. A faulty radiator cap can cause your car to boil-over at a lower temperature.


Water coming out right underneath the radiator cap


Another view of the radiator

Basically, what it does is add more pressure to the cooling system. In another word, more pressure on the radiator. Unlike the aluminium ones, stock radiator is not very robust. When the pressure builds up , it has no where to go but up and something has to give way. In my case it's the top part.

At the moment, 7474 is stranded at home until I get myself a new radiator. It will be a very good excuse for an upgrade. My choise would be KOYO radiator. As if I have a lot of choise in Malaysia.











During the installation I encountered several problem. Since when I got the waste gate with the front pipe it was done with a stock radiator therefore the was a lot of space in front of the waste gate. The new radiator is much bigger and you can guess what happen next.

There is no space between the waste gate and the radiator. JFA did a good job in doing the minor adjustment needed for the clearance.


Front view



Before Koyo



After Koyo


KOYO Radiator

Got tyhe radiator from N1. Since N1 is kind of busy preparing their track car for this weekend race. So I had to install my radiator at Ex-Cool.


Damaged:

1). KOYO Radiator ~ RM:2000 (N1 Racing) Normal price : 2400
2). Installation ~ RM: 80
3). Re-adjust wasgate position ~ RM: 500 (JFA)