Hey, I've got a 91 Loyale and I'm pretty sure its got a clogged heater core. Thermostat was just replaced and blower motor was replaced in the last 10000 miles but the heat is still only the faintest bit warm. Going into another cold snap here in the midwest, so flushing the heater core seems like the next option.
I was planning on using the garden hose pressure + detergent method followed by hooking the hoses up backwards for a day, but I'm not so knowledgeable on the system layout, so I need confirmation that I've got the right hoses. Are the heater core hoses the two rubber hoses that are maybe 1" diameter and enter the fire wall next to eachother directly under the spare tire mount?