M6800 got hot, small pop noise, then lost some coolant and steamed.

[Jonerin]

Cant find a bad hose, could the radiator have pressurized and popped, is the cap a pressure relief type?

 

[Ed ke6bnl]

seems like you will need to fill in and get a pressure tester that you can pressurize the system to rad cap value and look for leak. or you can make a tee that goes in the hose that has a shreader that you can fill with air with a tire chuck to the radiator cap value and search for that source of water leak.

 

[Jonerin]

It almost looks like the cap blew, is that a possibility?

 

[oldnslo]

Most systems are pressurized so if relief doesn’t open the cap could be blown off.

 

[Jonerin]

So there is a releif that opens if the pressure fets too high?

 

[oldnslo]

I suspect it is built in to the radiator cap on that model. Is there an over flow tank connected to the neck of the radiator where the cap screws on? If yes then cap is the relief.

 

[Tx Jim]

Ditto radiator cap should open neck seal at any pressure over I'll guess 7psi