Sooo. I was just wondering of its normal or not but my the coolant in the reservoir keeps disappearing. The car doesn't overheat or anything and i dont see any leaks so i was wondering what this could possibly be or if its common?

 

No. There is an internal or external leak.

 

Found out the issue. Turns out I need a new radiator.

 

you lucky its just the radiator and not blow water port seals. koyo 3 core aluminum radiator is a good buy

 

Thanks 'll look into that.

 

Any trust worthy places where I can purchase these??

 

http://www.absoluteradiator.com/importstore.asp#Mazda

I picked up my S4 Koyo from these guys. Their site only shows the S5 one now, but you may be able to get the S4 if you give them a call. The filler neck on the S5 rad will interfere with the fan shroud on an S4.

 

I have an s5 so I'll be good I guess. Thanks for the link and the help. Much appreciated.

 

thought i was having having the same problem until i realized it was leaking out of my overflow bottle

 

So how'd you fix that ?

 

got a new ast cap and tried that, but now its looking like im going to have to rebuild because its most likely a coolant seal

 

I poured more coolant and ran it to so if I could spot the leak. I definitely need a new radiator. No big deal especially when I found the koyo radiator for $223.