Coolant leak

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2007 Mazda CX-9 Touring
I have a leak in the nipple that comes out of the radiator which is next to the drain plug. I squeeze the hose and nothing comes out,then i squeeze the plastic nipple same result. After a while it gets wet again with coolant. Is it the hose or the radiator. Also does anyone have a part number to that hose in case I have to replace it. And the other picture shows 2 hoses connected to a pipe fitting what is that for. This is a 2007 model.
 

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Hose coming off radiator runs to the overflow tank I think. Part # is CY0115537B.

The fitting is a part of a coolant line that runs to the oil cooler.
 
Thanks for the quick reply. I thought the same thing but this is a shorter hose which runs to something else. I will try to take a pic of where it goes to. Do you think it is the hose or the radiator nipple. Thanks again for the reply.
 
i just replaced that fitting, it is not a hard job, it is only one bolt to the top of the beam. Just use some vice grip on each side so you don't drop all the coolant. Part number CY0115520B.

part number 16
5423035.png
 
Thank you for the part number. I will be replacing that also. I was wondering what are your thoughts on the small leak coming from the hose that attaches to the plastic nipple next to the radiator drain plug.
 
Hard to tell, have you tried to just put an additional collar on the hose? Sometimes the deposits of a small leak prevents the hose from sitting evenly, you can clean it and use a regular hose clamp which will adjust even if the hose is a little compressed compared to the OEM clamp.
 
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