We have a 1993 Mazda MPV van and need to flush the heater core out, how do i do it and whats it look like

Your going to need a flush kit, but it is much easier if you let someone qualified do it.

Your heater core is a small radiator & it is usually located in or under u dash.somewhere. They can be very difficult to get at sometimes.

It is part of ur cars cooling system. If u do a full cooling system flush u will also be flushing the heater core. The most effective cooling system flushes can take an hour or more of flowing special chemicals through the system & is best left to a pro. A basic flush, where u simply run a cleaner through ur system works Ok, but is not as effective.