Question about 1993 Toyota Corolla

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Why don t my radiator fans start on my 1993 toyota corolla?

Eventually the coolant starts leaking out of the overflow valve and the engine get super hot. Happens both at idle and when moving.

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  • Toyota Master
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THERE ARE A LOT A POSSIBILITIES....IT COULD BE THE FUSE,THE RELAY,THE FAN SWITCH,THE FAN ITSELF,AN ELECTRICAL SHORT ECT.DOES YOUR TEMPERATURE GAUGE ON THE DASH WORK?CHECHK THE FUSE & RELAY FIRST

Posted on Dec 12, 2008

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1 Answer

Coolant not visable


do not ever run the vehicle and check the coolant, coolant will go everywhere. leave the vehicle off and make sure its cold and then open radiator cap if radiator and overflow are empty then fill the radiator full and fill overflow to the fill line. put the cap back on then start vehicle. if no leakes then you where just low on coolant.

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When was the last time you flushed your radiator?
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Jul 20, 2012 | 1994 Toyota Corolla

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Hi There how do i get rid of an airlock in the radiator of my 91 toyota supra?


Normally, you shouldn't have to bleed the cooling system but, there are two bleed valves. (these are the most logical locations)One is just above the water pump, and the other is on the thermostat housing. They are really small, and due to the age of your car, they will be brittle and almost impossible to open without breaking them.
You don't want to break them. If you are hearing air circulating thru the cooling system, try this and let me know how you make out.....


Physically look in the radiator under the cap(if one exsist's) when cool, for coolant level, and check the valve in the cap for sticking. If air is present in the radiator it can't get out, and more coolant can't get in,(from the overflow). Either clean the cap or replace it and check that it is the CORRECT cap.

If radiator is low on coolant fill it to overflowing, replace cap, and check that coolant overflow is filled to the COLD line or mark. The overflow is normally where you would add coolant. (never overfill the overflow) After refilling as outlined above, check the level every morning for 2 or 3 days until coolant level stops dropping below the cold mark and add coolant to the overflow ONLY. Do not open the radiator cap. Also, if you have even a tiny coolant leak anywhere in the system, air will get drawn in, instead of coolant from the overflow.

For more OVERHEATING PROBLEMS try these...
Radiator fins dirty, clean with a strong stream of water, not high pressure water.
Radiator clogged, try backflushing it, or replace.
Thermostat stuck open or shut, replace it.
Water pump worn out, can no longer move enough coolant, replace it.
Fan shroud broken or missing....
Electric Fan(s) not working, Check the fan, relay, fuse and engine temperature sensor's.
Belt driven fan, belt slipping, fan clutch is bad, fan blades have flattened out.

Air dam under front bumper is gone, loose, or broken. It actually has a purpose other than scraping on the driveway or curbs. It forces air up into and thru the condenser and radiator. If it's loose, airflow can actually push it out of place making it useless or blocking the airflow. Along with that, there may also be a plastic piece attached to the bottom of, and wraps up behind the bumper. If it

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1 Answer

Overheating


OVERHEATING CAN BE CAUSE BY MANY THINGS LIKE FAULTY THERMOSTAT AND FAULTY RADIATOR PRESSURE CAP,TOO MUCH WATER IN COOLANT SYSTEM NEED 50 / 50 WATER AND ANTIFREEZE.LOOK FOR WATER PUMP WEEP HOLE LEAK, IF COOLANT LEAKING OUT WEEP HOLE WATER PUMP BAD NEED REPLACING.CHECK FOR LOW COOLANT LEVEL, YOUR RADIATOR OVERFLOW JUG SHOULD HAVE COOLANT AT THE FULL COLD MARK IF NOT KEEP ADDING COOLANT INTO COOLANT OVERFLOW JUG UNTIL COOLANT STOP DROPPING AND FULL COLD MARK, IF OVERFLOW COOLANT JUG WAS EMPTY RADIATOR IS LOW ON COOLANT.WHICH CAUSE AIR IN COOLANT SYSTEM KEEPING THE ENGINE COOLANT TEMPERATURE SENSOR FROM BEING SUBMERGE IN HOT COOLANT WHICH TURN ON THE COOLANT FANS.WHEN ENGINE COOLANT TEMPERATURE GET CERTAIN SET TEMPERATURE LIKE 190 DEGREES THE PCM AND COOLANT SENSOR WILL TURN ON COOLANT FANS, IF VECHICLE OVERHEATING COOLANT FANS NOT WORKING EITHER YOU HAVE FAULTY ENGINE COOLANT TEMPERATURE SENSOR CHECK COOLANT FANS FUSE AND RELAYS. YOU CAN CODE SCAN CAR TO SEE IF YOU HAVE FAULTY PCM, FAULTY ENGINE COOLANT TEMPERATURE SENSOR OR FAULTY COOLANT FAN RELAY.IF COOLANT FAN AND ENGINE COOLANT TEMPERATURE SENSOR OKAY,YOU HAVE CORRECT COOLANT LEVEL IN COOLANT SYSTEM, THERMOSTAT AND RADIATOR PRESSURE CAP BEEN REPLACED, YOU COULD HAVE BLOWN HEAD GASKET CHECK ENGINE OIL LOOKS LIKE MILK SHAKE HEAD GASKET BLOWED ALSO WHEN HEAD GASKET BLOWED YOU CAN DRIVE CAR SHORT DISTANCE START OVERHEATING AND YOU LOOSE ENGINE POWER SUSPECT BLOWED HEAD GASKET.

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1 Answer

Overheating


CAR OVERHEATING FIRST CHECK FOR LOW COOLANT IN THE RADIATOR COOLANT OVERFLOW JUG.IF COOLANT LEVEL IN OVERFLOW JUG LOW REFILL ADD COOLANT BACK TO THE FULL COLD MARK.PUT RADAITOR CAP ON COOLANT OVERFLOW JUG START ENGINE LET IT IDLE UNTIL IT OPERATING TEMPERATURE.MAKE SURE TOP RADIATOR HOSE GETTING HOT WHILE ENGINE WARM UP.IF TOP RADIATOR HOSE DONT GET HOT WHILE ENGINE IDLING YOUR THERMOSTAT COULD BE STUCK CLOSE CAUSING CAR TO OVERHEAT.IF TOP HOSE IS GETTING HOT.CHECK FOR COOLANT LEAKS CHECK TOP RADIATOR HOSE AND BOTTOM RADIATOR HOSE FOR LEAKS.CHECK FOR LEAKS AT THE RADIATOR CORES AND PLASTIC SIDE CONTAINERS.IF ALL IS GOOD ENGINE OVERHEATING WHILE IN A LONG TRAFFIC LINE, COOLANT FANS NOT COMING ON.COULD HAVE FAULTY ENGINE COOLANT TEMPERATURE SENSOR OR BLOWN COOLING FAN FUSE OR RELAY.COULD HAVE PCM FAULT.MAKE COOLING FAN ELECTRICAL CONNECTORS AND WIRING NOT DAMAGE OR BROKEN.

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1 Answer

95 toyota corolla 1.8 engine, cooling fan works but only when you disconnect the fan switch, or by pass the fan relay, it's not overheating, but it's causing the coolant to overflow the resivor. Replaced...


Check the engine main relay, the radiator fan relay no. 1, 30A CDS and FAN fuses, and the ECT (engine coolant temperature) sensor for proper function. For the ECT, there should be continuity when the engine is cold (200F).

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2 Answers

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1 Answer

My heat doesn't work in my 1993 toyota corolla


Could be vapor lock, or air lock/bubble. First make sure the coolant is topped off, never do this when the car is hot! Take off the radiator cap and poor in anti-freeze, replace cap, now start the vehicle COLD remove cap and pour in more anti freeze if needed. When the engine runs it will **** anti-freeze(coolant) and therefore you may need to pour in a little more. Now wait until the car is hot and check for heat. If you have ever heard a gargling sound or bubbling when you turn your car off, this is a sign of low coolant and or air lock. If you still do not have heat, make sure your coolant lines by the engine are connected as well as any electrical wires going to your temp control valve located between your coolant hoses where coolant runs through it. If you still do not have heat, your water pump may be failing, how ever if your engine does not overheat, then do not replace it. Lastly there is a control valve that opens and closes a flap door to allow/block heat. If this controller failed then you will need to have it replaced.

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1 Answer

Hello my car didnt have a coolant issue until a guy at autozone told me to put block sealant in the radiator.My 93 toyota corolla holds coolant but it leaks out after two days. And the coolant gauge...


take your car to a real shop and have them pressurize
the coolant system and look for where the coolant leaks,then you'll know exactly what needs to be repaired.take it to a shop you trust.

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