valve cover gaskets valve cover gaskets
Most of the time it is caused by a hole in the heater core, do you smell a sweet smell? The sweet smell would be the antifreeze.
Bad heater core.
is it damp under or near the dash ? if so its most likely your heater core cause it will cause a very bad smell that would be first thing I would check
low coolant? Bad thermostat? Climate control not sensing proper temperature? Heater core plugged or restricted? Heater core airbound?
Coolant leak? Check your heater core.
hellow just wonderin if you guys know where would be the heater core on my 2003 Lincoln navigator
heater core possibly plugged and leaking
Does it smell like antifreeze? If so, it is most likely a bad heater core, or one of the hoses feeding it.
No...
Leaking heater core
Probably a leaky heater core. Look in the passenger side floor board (maybe driver side as well) and see if the carpet is wet. These are all tell tell signs of a heater core that is leaking.
SOUNDS LIKE THE BUSHINGS IN THE BLOWER MOTOR Check your heater core...it may be dried out. This can cause a rotten egg smell. can also be valve cover gasket and you just don't smell it when the air isn't on. http://www.autozone.com/servlet/UiBroker?UseCase=S001&UserAction=viewSimpleDiagInfo&Parameters=info