I AM ASSUMING YOUR RADIATOR IS TOPPED OFF WITH COOLANT?
(MOST EVERY OWNER'S MANUALS I'VE I'VE SEEN. TELL YOU TO CHECK YOUR OIL AND RADIATOR LEVELS. LIKE "ONCE A WEEK")
YOUR RADIATOR HOSES ARE GETTING HOT AT THE RADIATOR?
UP YONDER AT THE FIREWALL, YOUR HEATER HOSES ARE GETTING HOT WHEN THE VEHICLE IS AT OPERATING TEMPERATURE. JUST BEFORE THEY ENTER THE HEATER CORE?
IT MIGHT BE THAT YOUR THERMOSTAT IS "STUCK OPEN". THUS, NOT LETTING YOUR ENGINE BUILD UP TEMPERATURE----RATHER YOUR WATER MAY BE CONTINUOUSLY CIRCULATING AND THE RADIATOR IS COOLING. SORTA "ALL OF IT" CONSTANTLY
THE REASON OVER "40 MPH" MAY SHOW "SIGNS OF WARMTH" IS THE ENGINES CYLINDERS ARE WORKING HARDER--BUILDING MORE HEAT. AND NOW THE RADIATOR CAN'T QUITE "KEEP UP" LIKE IT WAS WHEN IT WAS CIRCULATING SLOWER AND TEMPS WERE NOT AS HIGH
THE THERMOSTAT IS BASICALLY A TEMPERATURE OPERATED VALVE THAT ALLOWS THE WATER INSIDE THE ENGINE TO HEAT UP TO LIKE 195 DEGREES----ONCE "196" IS REACHED, IT "OPENS" AND ALLOWS A SHOT OF WATER TO ENTER THE RADIATOR TO BE COOLED THRU THE TOP RADIATOR HOSE----SIMULTANEOUSLY "THAT WATER" IS REPLACED WITH COOLER WATER ALREADY COOLED BY THE RADIATOR THRU THE LOWER RADIATOR HOSE
THE WATER THAT IS KEPT AT "195 DEGREES" INSIDE THE ENGINE DOES IT'S OWN CIRCULATING THRU THE ENGINE AND SMALLER HEATER HOSES
IF THE THERMOSTAT FAILS TO CLOSETHE WHOLE DEAL GETS COOLED ALL OF THE TIME
DOES THIS MAKE SENSE---OR DO YOU NEED A BETTER EXPLANATION?
KEEP ME INFORMED ON PROGRESS
THE MEDIC
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Monday, December 17th, 2012 AT 5:34 PM