Question about 1995 Toyota Previa

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My toyota lucida

Always engine over heat the water pump good radiator good condition and the head cilinder good why is always hot

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I had the same problem, my mate is a Toyota mechanic and started by checking the radiator cap pressure, as if it doesnt have enough pressure it will run out of the expansion tank and leak! So i changed that as it was bad. Then he changed the termostat and things have been good since.

Posted on Mar 27, 2009

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Have youu check thermostad some times stuck, check the condition of the hose pipes.
check how is the fan,
have you check if the cylider head crakes because of ovaheating..

Posted on Oct 19, 2008

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3.0 D4D overheating


Check between the Air con condensor & radiator for grass etc... (restriction of air flow) if no restriction remove the thermostat & replace. If there is grass do not try to remove with water you will need to remove the radiator & pick it out bit by bit or use soft brush (dustpan brush) & compressed air or soft (not to hot) flame & burn to ash then blow with air. ALWAYS Blow from engine side & remove from other side so you don't force it further in. (This can take hours but is quite a common problem)

Jan 03, 2013 | 2006 Toyota Fortuner 3,0

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My 1988 toyota crissida runs hot,Idles to high and hardly has any power.Somedays its fine and has power but always runs hot


The overheating of the car can be due to many reasons and you need to check on each one to confirm the working of the system.
1. In the first place the working of the engine must be assessed. it must be smooth with a good indication that the tuning timing and the power seems good. This will confirm that the settings of the engine is good and so there is less scope that the engine seems to heat up on its own.
2. Secondly the radiator pressure cap must be tight and good, the radiator MUST not loose coolant after a run or in a few days time- since this must be a sealed system and there is no scope of water overflow or loss unless there is a leak- sometimes the leak is too microscopic as under high pressure only steam might escape and so reduce the coolant. So check for leaks while the engine is hot , specially the radiator, the hose or the fittings.
3. The working of the water pump must be good to ensure a good flow and circulation, so check for leak in the water pump, check for presence of water in the exhaust or leaking on the engine gaskets.
4.Make sure that the coolant is good and clean if not drain and refill , if there is presence of rust please have a good flushing of the radiator or else the chances are that the radiator ports can be blocked and reduce the efficiency of the cooling .
5. Finally the cooling fan, the radiator fan must be working, check the thermostat/thermistor to work accordingly with good flow, have a good water jet wash on the radiator for a clean radiator cooling fin exposure.

Nov 08, 2011 | 1988 Toyota Cressida

2 Answers

My car overheats very easy.i can drive 1 exit on the highway and the temp goes up very fast. i dont know what it could be. there is always fluid in the reserve area and doesnt seem to be getting low or im...


COULD BE THERMOSTAT IF TOP RADIATOR HOSE IS NOT HOT AND BOTTOM RADIATOR HOSE GOING TO WATER PUMP IS HOT THE THERMOSTAT STICKING PARTIALLY CLOSE.IF TOP HOSE IS HOT THE RADIATOR,ENGINE BLOCK HEATER CORE NEED FLUSHING OUT.IF WATER PUMP WEEP HOLE LEAKING REPLACE WATER PUMP, FAULTY WATER PUMP WILL CAUSE ENGINE TO OVER HEAT.REPLACE RADIATOR CAP MAKE SURE YOU HAVE 50 / 50 MIX SOLUTION ANTIFREEZE AND WATER IN COOLANT SYSTEM. IF ALL LOOKS GOOD CHECK ENGINE OIL ON DIP STICK, IF OIL IN DIP STICK LOOK LIKE MILKSHAKE YOU HAVE BLOWED HEAD GASKET THAT WILL CAUSE ENGINE OVERHEATING WHILE DRIVING CAR IN SHORT DISTANCE AND ENGINE OVERHEATING.

Aug 16, 2011 | 1999 Oldsmobile Alero

1 Answer

Reduced torque and high temperature on toyota lucida 2.2 ltr. 3C diesel during steep grade. Problem also show if the vehicle is heavily loaded


yeap we have this problem, we had the radiator flushed and it fully serviced.problem came back.no visible water leak under pressure test by mechanic.ours turned out to be the head gasket.not good.new engine .not worth trouble

Jan 31, 2011 | Toyota Previa Cars & Trucks

1 Answer

Engine overheat,water pump and radiator in good condition, what is other problem?


While the car is running look into the overflow and see if you see bubbles going into it. If you do you have a head gasket leaking. Also while the car is running, feel the upper radiator hose temp. and feel the lower radiator hose temp and compare how hot they are. If the upper seems to be alot hotter than the lower hose, your thermostat is stuck shut.

Apr 09, 2010 | Toyota Corolla Cars & Trucks

1 Answer

I'm losing water out of my radiator but i can't see that it is leaking any where. I'm not sure where the water pump is. For some reason, the water seems to leak out of the over flow when it is hot.


check your radiator cap condition if its ok then your engine must be having a cylinder head gasket problem, normally when engine overheats the cylinder head gasket gets fried-up and the water goes off to the exhaust along with the exhaust gas thats why u dont see any trace of leakage on the floor/ check your engine oil as well if oil and water mix together to conclude the theory.

Apr 03, 2010 | 1991 Toyota Pickup

2 Answers

1995 toyota lucida i have replaced radiator but


The engine is kept cool by a liquid circulating through the engine to a radiator. In the radiator, the liquid is cooled by air passing through the radiator tubes. The coolant is circulated by a rotating water pump driven by the engine crankshaft. The complete engine cooling system consists of a radiator, recovery system, cooling fan, thermostat, water pump and serpentine belt.

Check the coolant level in the recovery bottle or surge tank, usually mounted on the inner fender. With the engine cold, the coolant level should be at the FULL COLD or between the FULL HOT and ADD level. With the engine at normal operating temperature, the coolant level should be at the FULL HOT or HOT mark. Only add coolant to the recovery bottle or surge tank as necessary to bring the system up to a proper level. On any vehicle that is not equipped with a coolant recovery bottle or surge tank, the level must be checked by removing the radiator cap. This should only be done when the cooling system has had time to sufficiently cool after the engine has been run. The coolant level should be within 2 in. (51mm) of the base of the radiator filler neck. If necessary, coolant can then be added directly to the radiator.

While you are checking the coolant level, check the radiator cap for a worn or cracked gasket. If the cap doesn't seal properly, fluid will be lost and the engine will overheat.

Worn caps should be replaced with a new one.

Periodically clean any debris; leaves, paper, insects, etc. from the radiator fins. Pick the large pieces off by hand. The smaller pieces can be washed away with water pressure from a hose.

Carefully straighten any bent radiator fins with a pair of needle nose pliers. Be careful, the fins are very soft. Don't wiggle the fins back and forth too much. Straighten them once and try not move them again. It is recommended that the radiator be cleaned and flushed of sludge and any rust build-up once a year. If this has not been administered within the stated time, this may be why your vehicle is overheating at this time. Have the Radiator flushed asap if this is the case.

Now, if the coolant level is proper and, the cap is in fair or good condition, i would advise to move in the direction of the cooling fans and sensors as well. These fans are vital to the cooling process as well. The cooling fans must cycle in intervals to keep the coolant cool during stop and go driving or, long idle. They are also very important during the operational period of the AC during travel as well. i recommend inspecting the cooling fans while the engine is running. they should cycle during the running period. if this is not the case, you will need to test the operational value of these devices. The test procedure follows below


TESTING


1. If the fan doesn't operate, disconnect the fan and apply voltage across the fan terminals. If the fan still doesn't run, it needs a new motor.

2. If the fan runs, with the jumpers but not when connected, the fan relay is the most likely problem.

3. If fan operates but a high current draw is suspected continue with the following ammeter TESTING.

4. Disconnect the electrical connector from the cooling fan.

5. Using an ammeter and jumper wires, connect the fan motor in series with the battery and ammeter. With the fan running, check the ammeter reading, it should be 3.4-5.0 amps; if not, replace the motor.

6. Reconnect the fan's electrical connector. Start the engine, allow it to reach temperatures above 194°F and confirm that the fan runs. If the fan doesn't run, replace the temperature switch.



Ok, Now we will move on to the next possible issue. The water pump. ok, due to the fact that your pump is driven by the drive belt, you will need to start the engine and listen for bad bearing, using a mechanic's Stethoscope or rubber tubing.

* Place the stethoscope or hose on the bearing or pump shaft.
* If a louder than normal noise is heard, the bearing is defective.

Replace the pump in this case.

You will also notice leakage around the pump housing if the seal has failed as well. this will strain the impeller and, ruin the pump.

Now. the last area of concern will be the thermostat. this is the most common issue that will inflict overheating in many vehicles. The thermostat is used to control the flow of engine coolant. When the engine is cold, the thermostat is closed to prevent coolant from circulating through the engine. As the engine begins to warm up, the thermostat opens to allow the coolant to flow through the radiator and cool the engine to its normal operating temperature. Fuel economy and engine durability is increased when operated at normal operating temperature.


There are several ways to test the opening temperature of a thermostat.

One method does not require that the thermostat be removed from the engine.

* Remove the radiator pressure cap from a cool radiator and insert a thermometer into the coolant.
* Start the engine and let it warm up. Watch the thermometer and the surface of the coolant.
* When the coolant begins to flow, this indicates the thermostat has started to open.
* The reading on the thermometer indicates the opening temperature of the thermostat.
* If the engine is cold and coolant circulates, this indicates the thermostat is stuck open and must be replaced.

The other way to test a thermostat is to remove it.

* Suspend the thermostat completely submerged in a small container of water so it does not touch the bottom.
* Place a thermometer in the water so it does not touch the container and only measures water temperature.
* Heat the water.
* When the thermostat valve barely begins to open, read the thermometer. This is the opening temperature of this particular thermostat.
* If the valve stays open after the thermostat is removed from the water, the thermostat is defective and must be replaced.
* Several types of commercial testers are available. When using such a tester, be sure to follow the manufacturer's instructions.
* Markings on the thermostat normally indicate which end should face toward the radiator. Regardless of the markings, the sensored end must always be installed toward the engine.
* When replacing the thermostat, also replace the gasket that seals the thermostat in place and is positioned between the water outlet casting and the engine block.

* Generally, these gaskets are made of a composition fiber material and are die-cut to match the thermostat opening and mounting bolt configuration of the water outlet.
* Thermostat gaskets generally come with or without an adhesive backing. The adhesive backing of gaskets holds the thermostat securely centered in the mounting flange, leaving both hands of the technician free to align and bolt the thermostat securely in place.

Jan 17, 2010 | 1994 Toyota Previa

5 Answers

Overheating all the time


First, anytime a thermostat is overheated, it's ruined.

Second, if this car has electric fans, are they running when they are supposed to? If not, replace the fan control module, and/or test/replace the fan motors.

When the radiator was replaced, were you certain to purge the radiator and engine of all air before replacing the radiator cap? When you refill an emptied system, you always start the engine and watch the fill level in the radiator, refilling as necessary until you know the thermostat has opened. You need to have the heatrer controls set to full hot as well. Once the radiator is filled, put the cap in place, and fill the reservoir to the level indicated for a hot engine.

Finally, check to make sure the lower radiator hose is not collapsing while driving. While this is difficult to check (because your going down the road), just replace it when you replace the thermostat.

All of this assumes you do not have a cracked head or blown head gasket.

Dec 18, 2009 | 1992 Toyota Celica

2 Answers

I have a 1995 cadilac elderado that keeps over heating, it has excessive preasure building up we have changed the thermastate, ran a hot wire to the fan so it always runs , changed tempature sending unite...


When the engine is cold,and the radiator is full,starting the engine,does it blow out the radiator?If it does,then a head,or head gasket is blown.If not,bleed the system of air.The engine cooling system might have air that needs to be purged out.

Oct 06, 2009 | Cadillac Eldorado Cars & Trucks

2 Answers

After a short driver water comes out expansion tank


CHECK WATER LEVEL CHECK OIL LEVEL IF NO WATER FILL UP AND IF WATER DISSAPERS OR TURNS MILKY YOU HAVE A HEAD GASKET PROB CHECK WHILE RUNNING BUT DONT GET TOO HOT

Jul 29, 2009 | 1995 Mitsubishi Montero

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