1998 Ford F150 V8 Two Wheel Drive Automatic 277600 miles
I've had this vehicle since it was new. About 2 years ago I had to remove hoses from heater at firewall and blow the rust out of the heater core to get it to heat like normal in the cold weather. That fixed the heater problem at the time. When it got cold this time, I did the same thing and a large amount of rust came out so I thought the problem was fixed. I run almost 100% pure antifreeze and always have. There are no leaks in the cooling system and the temp gauge is not indicating lower or higher than normal operating temp, but even when the engine is sufficiently warm, the air coming through the heater is simply not very warm. If the fan is run on any speed other than low, the air actually becomes cool. It doesn't appear that there is sufficient coolant flowing through the upper radiator hose, but the overflow tank is at normal. I've replaced the thermo thinking it was stuck open, but no change. Is there something about the cooling system on this vehicle that is peculiar about clogging with rust and restricting coolant flow through the heater core? Help?
have the same problem?
Saturday, January 17th, 2009 AT 10:27 AM