If I understand your problem correctly if sounds as if the engine mount bolts broke which allowed the engine to drop which may have kinked your radiator hose, that caused a flow problem and the engine over heated.
If this is what you are saying it is possible the inner liner of the hose ruptured and folded in causeing a restriction in the hose, this use to be fairly common with hose's in the 50's and 60's but is pretty rare these days.
You need to check the hose for soft spots, if you do not find anything there its time for some tests, the first would be to remove the thermostat and run the engine to see if you have flow in the radiator, if your radiator has a cap at the side tank run the engine with the coolant a little low, if there is flow your will be able to see the coolant coming out of the tubes inside at the top of the core. If there is no flow you need to take a better look at the hose and possible the water pump impeller.
Hello, this is a bit puzzling from the standpoint of circulation. I am wondering why you blamed the thermostat instead of the Electric cooling fan. Is there any possibility that in working on the motor mounts the 2 wires from the temperature sensors were switched?
One water temp sensor operates the Electric fan and the other operates the Temperature gauge. If you are overheating the cooling fan should be on, especially without the water circulating. You can always remove the thermostat to get circulation.
Have you tried moving the heater temperature switch to hot? You could have an airlock in the heater hose. Some manufacturers use the heater core as auxillary capacity for antifreeze. The core always has circulation, the ductwork under the dash uses flaps to keep the heat out in the summer. Others use valving on the water lines.
Anyway, check out the less intrusive things I brought up first, then go after your thermostat to see if somehow the Radiator took a dive. Good luck and I hope something I discussed will help.
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i have changed the thermosat, felt the hoses no soft spots, but just does not seem to be any flow out of the engine,there is a bypass hose before the actual thermostat it goes to the coolant tank, air and water seem to be constant from there, but is it just because the water is expanding into steam and bubblesout... does not overheat with the coolant resivior cap in place it is when the cap is installed and the cooling system pressureizes that it over heats. with no flow aross the radiator or heater core. this is what is not making any sense, i ahve yet to see a water pump impeller let go and not make a noise...
cooling fans work at the correct time, turns out no coolant flow through the system turns out the water pump impeller sheared off, its made of plastic , fractured and spun loose.
waterpump impeller had sheared off, its made of plastic and the jolt of the car must have fractured it and it broke off. Thanks for the direction
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