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Message: <blockquote data-quote="ORVietVet" data-source="post: 20718" data-attributes="member: 9438"><p>Got a call from the manager friend of mine, that me and my American Legion friends eat tacos at her bar on Tuesdays and Thursdays. She called me at 9 am, I was gonna take the day off and lazy around, and her son's 2007 Mazda 3 had no heat. The temp gauge showed normal, 1/2 gauge. Coolant was full. I said bring it over and leave it. Her husband and son showed and said that when driving at higher speeds, the heat was there. I did a quick look and the water pump was leaking and I said at least the water pump and I will do thermostat at same time. The water pump was not the problem but the stuck open thermostat was. It now has heat at idle but not as much as I think it should. The heater core feed hose is hot and the return hose is warm and gets warmer when rev engine. Sitting over night and am gonna flush out the heater core tomorrow. The coolant I drained out of it had plenty of little bits of black debris in it. He does not take very good care of it and they did not say anything about oil leaks I saw under there when removing the lower engine splash shield. Kids cars, what cha gonna do???????</p></blockquote><p></p>