Have a 92 tercel which was running hot and no heat, changed head gasket and now it will start as long as no coolant is in it, once coolant is put in it wont start and collant runs out of intake also when cooling system is under pressure any idea?

I answered this with a lengthy explanation.. about blowing your head gasket do not run a car when it over heats it will cost you a engine.. wait until it cools down to add water and most likely you need a new thermostat or you already have a blown head gasket .. this is much cheaper then an engine do not drive car when HOT.

you are air locked in the heater core you will have to remove one heater hose and fill anti freeze into that hose until coolant runs out of the open nipple then put hose back on fast top off coolant start engine run til both hoses are hot for heater core..if only one is hot coolant is not circulating

The Engine Temp. sensor is bad. it is under the intake manifold. if there is a miss also check under the coils over the spark plugs. If there is Coolant in the spark plug holes .then the intake gasket is leaking. The intake manifold needs to come off to change the coolant sensor. When off look for corrosion on the cylinder head at the coolant port. If there is corrsion then the cylinder head must be replaced.

Thermostat improperly installed. (backwards) Or possibly you could have a blown head gasket and a bad thermostat at the same time. The head gasket could be letting exhaust gasses into the cooling system. A bad (stuck open) thermostat could "mask" this problem by allowing the coolant to circulate through the radiator when it is not supposed to. Thus, installing a new thermostat would trap the exhaust gasses in the cylinder head and cause the overheating.

Hi if when you filled the coolant back up you trickled the coolant in to prevent an air lock and if you also undone all the air bleed screws that run around the top of the hoses that run around the top of the engine, if you done both of the above and you still have it over heating and not heat in the car then this sounds like bad news.

it sounds like it could be head gasket trouble.

first i would drain all the coolant and refill it very slowly and undo any bleed screws if you have any in any of the top hoses, then when the coolant level is where it should be do bleed screws up if you have them and then start the engine but leave coolant filler cap off turn the heater on hot and turn it on then let the engine reach normal running temp then put the coolant cap on.
then see if it over heats, if it does then you need to have a gasses test done to prove the head gasket is at fault.

you can buy this test yourself from car spares shops and its a bottle that fits over the coolant filler cap and it has a blue liquid inside it then you run the engine and draw the air through this liquid and if the head gasket has gone it will change the color of the liquid.

check oil for signs of white substance this would prove head gasket failure if no signs of this then you need to have the sniff test done before you do any more work to the car as you could be throwing money down the drain.

let me know how you get on or if you need further assistance ok

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hi, when you put the coolant in did you undo any air bleed screws that run around the top hoses running around the engine( if you cant find none then it must be self bleed system) then when you go to put the coolant back in you need to trickle it in very slow to ensure you dont get an air lock as this will cause it to over heat.

then when the coolant is up to its correct level you need to leave the filler cap off and start the engine then wait for the temp to be at normal running temp then switch it off and replace the coolant filler cap, then take it for a run and see if it over heats.

have you checked if the rad fan is working and cooling as it should be also have you checked the heater in the car is working on hot it needs to be on hot and check if you have hot air coming out.

if you dont have any hot air coming out then it could mean you have head gasket problems.

let me know what you find then ill assist you further ok

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Overheating can be the result of several things including: No coolant, stuck thermostat, cracked head, blown head gasket, bad water pump, cracked radiator side tanks, and poin holes in one or more hoses.

Start with the easiest things first. Check coolant level, if it's low you need to find out why. If it's at a normal level you know the coolant is not circulating through the motor. To test this run the car to temperature then feel the upper radiator hose, it should be hot and firm to the touch. Next feel the lower radiator hose it to should be hot and firm to the touch. If it's not the coolant isn't flowing through the motor which is the result of a stuck thermostat.

If the thermostat checks out ok crawl under the car and check all the connections between hoses/motor/radiator. Look at the side tanks of the radiator. If there's a carack in one they will only leak while the system is under pressure. Next check to make sure the water pump is circulating the coolant and not leaking. A siezed water pump will usually stop the pulley from turning resulting in a broken belt.

NExt look around the area of the head gaskets for signs of leakage, again this will only leak while the system is under pressure. Check the oil, if it looks milky there's coolant in it which is a sure sign of a gasket failure or cracked head. Good luck.

sounds leak head gasket or warpped heads, this is very costly ,good luck,

if it's running hot and really gutless it could be your timing..or a blown head gasket check your oil.make sure that it is not a milky color.if it is you probly have a blown head gasket..

are you loosing coolant ???? if so check from where.take one spark plug out and if it's wet thenyes your headgasket is blown
if not. take the refill cap off " probably in your radiator or expansion tank "
turb=n your car on for around an hour.
reffill coolant as needed, because you might have an air bubble in your motor causing it to overheat