MF285 blows water

I have a MF 285 that has a new radiator that wants to blow water out the overflow tube. I replaced the factory radiator cap with an aftermarket one I think is 16PSI. It still wants to blow water out. Of course it wants to run hot once the water gets down so I have to monitor closely. Seems to want to do it more when working hard than not. Runs cool until the water gets down. Thanks for any assistance.

Just a thought about safety for the people that dont know, never remove a pressurised cap from the radiator when the operating temperature has been reached. the sudden decrease of pressure in the header tank will cause the coolant to rush out instantly and if the person that took the cap off is in the way they can get burnt badly!

To check for bubbles getting through into radiator try this, run a neat fitting rubber hose from the end of the overflow pipe down into the bottom of a sturdy clear plastic bottle half full of water and then have the bottle tied where it can be seen easily, but have it out of harms way.
once the tractor is working and operating temperature is reached you should see the extent of the problem as the gas is forced out.
Cheers Arthur from Tassy

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