I have a 2000 ford explorer and I just replaced my thermostat and thermostat housing but i don't feel coolant flowing through the upper hose. Is that normal?
2007-11-01 03:01:05 · 5 answers · asked by desertlobo31 2 in Cars & Transportation ➔ Car Makes ➔ Ford
It's perfectly normal not to feel coolant flow at any time. At first the coolant circulates through cooling passages inside the motor block and cylinder heads by means of the water pump.When the motor gets hot enough to open the thermostat the water-pump starts to push hot (thermostat heat value) through the engine and out to the the upper radiator hose. From there the hot water is cooled by the radiator and returns the the motor through the lower radiator hose. At that time you will feel heat in the top hose. That means coolant is circulating fully and normally through your entire motor.
However, the thermostat is a heat sensing valve and it constantly is opening and partially closing so that the coolant stays slightly above what ever is stamped on the thermostat. Thermostats provide engine efficiency and helps keep the motor oil within a given temperature to drive off moisture, gasoline that escapes past the piston rings and provides the correct temperature so that all moving parts expand slightly so that critical clearances (bearings, lifter bores, cylinder bores and valve guides) are within tolerance.
2007-11-01 03:32:36 · answer #1 · answered by Country Boy 7 · 1⤊ 0⤋
You should feel some fluid flowing through the upper hose when the vehicle has reached a certain temperature. That depends on what type of thermostat you purchased, I'd imagine it was 190. Basically when the coolant hits 190 the spring contracts on the thermostat and allows coolant to flow into the radiator.
Make sure you check for flow when the vehicle is hot for starters. It may never open sitting at idle, check it just after driving. In addition if the vehicle is not overheating at this time it's doubtful you have a problem. Often times even when coolant is flowing through the upper hose it's hard to tell....hoses don't get uber tight with fluid like they used to on older vehicles.
Lastly, make sure your coolant level is topped off to the appropriate level. If you did not bleed the system of air during the repair it may give you a false reading on what "full" really is.
Hope this helps!
2007-11-01 03:10:34 · answer #2 · answered by mrharris32 4 · 0⤊ 0⤋
The big B.S. is that you should see a flow of coolant reguardless. I bypass the factory specs by drilling 2 small-1/8th holes in the outer ring of the thermostat. This insures that air will rise above the thermo allong with coolant. The end result is that air is purged and coolant flow is observed. The downside is that your engine may take an extra minute to warm fully and what hidden damage that may be taking place is no longer happening! Careful that the system is full of wrags and crap from the factory! Future security is not unlost on these perverts of industry.
2007-11-01 07:32:11 · answer #3 · answered by racer123 5 · 0⤊ 0⤋
Warm water rises. The water pump pushes the water into the bottom of the engine and it comes out to the radiator on the top.
2016-04-11 08:04:47 · answer #4 · answered by Anonymous · 0⤊ 0⤋
AFTER YOU HAVE LET IT RUN FOR A FEW MINS AND LET IT GET UP TO TEMP THE HOSE SHOULD BE HOT TURN ON THE HEATER WHILE YOU ARE RUNNING THE CAR AND MAKE SURE YOU HAVE HEAT AFTER IT GETS TO OPERATING TEMP
2007-11-01 03:14:49 · answer #5 · answered by Clayton G 1 · 0⤊ 0⤋