1994 Intrepid 3.3 Overheating - radiator replaced , thermostat replaced, water pump replaced, bled the cooling system 10 times...still overheating. What could the problem possibly be? Any suggestions?
Did you have the heater on while bleeding? Leave cap off, heater on and let it idle up to temperature, and occasionally rev slightly for a few seconds to help flow. Add as needed when coolant gets low during.
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Generally speaking, if it's turning, it's working. Although on rare occasions the impeller can erode, it is very rare. If you bring the car up to temp with the radiator cap off, when the thermostat opens the coolant should start flowing through the radiator. However, if there is an internal problem (like a head gasket), or the radiator is clogged, or there is still air in the system, it may belch out when it comes up to temp, so be careful. You may also check to see that the cooling fans are working if it only overheats while sitting still, I had a 626 with that problem. Let me know how it goes.
indicates no0t enough coolant in the system probably from an air lock that has not been bled out properly
overheating can be from head gaskets /cracked head or problem viscous fan hub
1. The thermostat in the cooling system could be sticking and need replacing. If it sticks in the closed position coolant cannot flow to and from the radiator and the coolant circulating through the engine will quickly overheat.
2. The water pump may be on its last legs and require replacing. If the pump has failed (and they do) the coolant will not circulate through the engine and radiator as it is designed to do and it will overheat quite quickly.
3. There could be a build up of debris in the cooling system that is impairing coolant flow through the engine. This can occur if the cooling system is not fully flushed out every 2 years and the coolant replaced. The cooling system must then be bled to remove all air. When replacing the coolant you MUST use the correct product as specified by the manufacturer and in the correct mix.
4. Radiator caps must be sound (and the correct specification) to ensure coolant does not escape and result in a low coolant condition and then overheating.
You need to get your car to a competent mechanic quickly to check and rectify the problem. (You may find it is only the thermostat as this is a common problem with time and usage.) Driving your car with an overheating condition WILL result in expensive engine damage. The head gaskets will blow and the heads on the engine will crack. Additional engine damage is also possible.
Cooling systems must be well maintained to prevent overheating and consequential engine damage.
Might be blown head gasket. Is there oil in the coolant or coolant in the oil? Either of these would tell you that.
Also the exhust can get into the coolant and make the coolant low all the time.
I had two Chrysler products that the exhaust forced coolant out and had a bad head gasket.
Did you install a new thermostat and make sure to bleed all the air out of the system when you replaced the radiator? If you didn't, or installed a Stant thermostat, replace it with a FACTORY OEM thermostat. Make sure the cooling system is bled by opening your radiator cap (WHILE THE CAR IS OFF AND COLD), starting the car and running the heater. Add coolant to the radiator as the engine heats up, until is at normal operating temperature AND starts spitting coolant back out.
Hope this helps, matt
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make sure that the system has been bled of all the air to do this there should be a little bleeder screw near the thermostat housing open this up until water comes out start the car and turn the heater on high watch for any air bubbles to come out of the bleeder until it is straight fluid coming out see if this fixes it, also check the radiator cap this could cause overheating too, if this is all fine check the fan switches to make sure they come on at right temperature.
Remove and raise upper hose at thermostat end and remove lower rad hose. Fill rad with a hose and watch for flow from bottom rad hose and/ or bottom rad hose connecton.......water should fall though rad easily. Honda rads are cheap.....any restriction....replace rad.
Remove thermostat....fill thermostat housing with hose and watch for water flow at bottom rad hose. Flush good.
Remove heater hoses.......flush back and forth until a good flow is present "With heater control set to hot" if no or poor flow....replace heater core.
Stop leak can plug everything.
Also.......not likely causing over heating....but ....at your mileage,if you do not know if the timing belt has been changed.....CHANGE IT NOW! Water pump is optional at this mileage.
I would go with slowcalafl. It is either air, or a cracked head bad head gasket. Remove the radiator cap when cool. Start up the car and watch for bubble emerging from the coolant. If it continues to bubble, you have a bad head or head gasket. If not, look for improper timing as another possibility.
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