while doing the brakes i also checked the radiator and noticed it was a brown liquid inside. I was wondering what would cause this
could be a few things wrong. the tranny fluid could be leaking in, or there cuold be motor oil gettig into the water somehow. This could be caused by a blown head gasket or cracked head.
how do i check if the head is cracked
Take it to a radiator place and ask for a pressure test....there should be a slight brown slick in the coolant as they put in anti leak blocks aswell when they change coolant as a precaution... but if it's full blown brown... then get it checked out.
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It could just be a bit rusty or the radiator cap is detiorating..
Most of the time a good flush out of the system will cure everything, unless things are as serious as a head gasket etc..
id say that the brown in the coolant is rusted pieces of your water pump....could be other things, but thats what is would most likely be.