1997 Mercury Sable Q&A
1997 Mercury Sable Question: Why is it overheating and no heat to cabin with fan and temp high.
Original owner, 133K miles, flushed system every 50K--Engine is Overheating after 10 to 15 mins. Upper hose line to radiator shakes w/ bubbling when hot and overflow cap whistles with new & proper mix of fluid. No hot air through cabin heat with full fan and highest temp. What I have completed: changed thermostat; flushed lines w/treatment; blew out lines to heating coil and throughout upper system. Coolant flows out reservoir & radiator drain, line to thermostat, upper lines during inline radiator flush. Can't be sure of the flow through radiator or determine what is a proper flow of coolant during engine run. Could radiator be clogged or waterpump bad? Ron - woodr001
Why did you do all of this work, did this just pop up all at once? - pushrod
cooling system bad to air lock on this engine. may have to get to a shop, have cooling system evacuated to get all air out. - mrfordman
What happens with the thermostat removed? GOOD circulation? If not then suspect water pump impellor is worn out.ANY possibility of incorrect thermostat installation?OR just defective? How are you purging the system ? - ziptie12