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Coolant system.

Coolant system.

 

I am curious. i am looking at repositioning my overflow bottle and getting a smaller one. Does the bottle need to be vented ?

on the existing tank there is a hole just below the screw cap. is this necessary ?

 

most off the over flow tanks i have been looking at do not have a vent hole

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    I got rid of the OEM tank as it fouled on my larger IC's. I bought a kit from CZP that is basically a small plastic bottle that fits on to the IC fixing mounting point, it is vented by a small clear tube that has a stopper at the end, however just before the stopper there is a small hole in the tube so should the water need to escape/vent it does so through this small hole.

     

    Before I ran this I had no expansion tank and the water in the radiator would always escape through vent pipe onto the ground, since running this, water level always remains constant.

     

    https://conceptzperformance.com/Cart/description.php?II=3851

     

    Hope this helps?

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