Question about 1999 Toyota Camry

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V6 camry engine overheating what are possible causes

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Make sure the reservoir coolant tank is at 'full'. Start the car from cold and observe. After a couple of minutes when the engine has begun to drop in revs ( the coolant temperature sensor should tell the ECU to begin to shorten the injection cycle as the engine warms) the top of the engine and the coolant passage to the thermostat housing should become warm to the touch. When hot the top rubber hose to the radiator should become warm and then hot as coolant begins to circulate. If the top hose fails to get hot at any time then the thermostat is at fault. If you have electrically driven radiator fans these should now come on. If they fail to come an at all you need to check the coolant temperature sensor, the electrical motor fuses and the motor relay. Lastly check the motor itself (just run a 12v supply to it directly). As the ar continues to idle, with the fans running, the bottom return hose from the radiator to engine should also become warm. If the bottom hose fails to become warm this points to circulation problems. Either the radiator had become clogged with rust sludge and needs an extensive flushing out with a high pressure hose or the pump is not functioning as it should. Quickly check that the interior heater works by asking for 'full heat with fan on full'. If the interior heater works this indicates that the main coolant pump is probably OK. To check the thermostat more thoroughly, remove it from the car and drop it in a pan of near boiling water; the 'stat should pop open. As the pan cools, at 88 degree centigrade or so, the 'stat should pop closed. Failure to observe this tells you the 'stat is a dead and needs to be renewed.

Posted on Sep 02, 2010

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Electric fan(s) not turning on the radiator.
Coolant level low.
Thermostat not opening up.
Needs to be flushed and filled.

Posted on Sep 02, 2010

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92' camry v6 started overheating ,noticed moister and drips from tail pipe. Blown head gasket or ? Also doesent appear to circulate in radiator untill I remove thermostat.Was going to R&R waterpum


A failed thermostat stuck closed will cause overheating. Test that item by boiling it. Nearly all car thermostats will have opened fully at 100 deg C. There may also be a number stamped on it to indicate its opening temp. You can keep track with a kitchen thermometer with a range above boiling.

A blown head gasket will often cause very quick overheating, and you may also see white bubbles like dry ice in the radiator neck. There is a simple test for combustion gases in the coolant, which any competent mech can do for you. The kit can also be bought from Autozone etc.

https://www.youtube.com/watch?v=a3J00_e7fyo

It is possible that the water pump has corroded away internally and is not circulating water, but if the car has always had antifreeze added, that should not happen. My Camry V6 water pump was still good after 220000 km. If you do get in there, replace the timing belt while you are at it.

A faulty temp sender in the block may also cause overheating, but only because it does not start the radiator fans when it should. You would notice if they were not running when the engine got really hot.

Tailpipe drips don't tell you much, as there is always moisture in the exhaust gas.

Sep 29, 2014 | 1992 Toyota Camry V6

1 Answer

1994 Toyota Camry LE V6 Overheating, Steaming Engine--Blown Head Gasket??


It is best to be systematic about this. It could be either the water loss or the overheating which is the basic cause, either one could come first.

- there is a test for combustion gases in the water jacket, from a blown head gasket. This will very quickly cause overheating, and the excess pressure will blow the water out the overflow reservoir. If the car has already overheated and died, this is unfortunately quite likely

http://www.youtube.com/watch?v=1_SIwHMLmkM


- the temperature sensor in the block may have failed. This will prevent the fans from running when the engine overheats, and you can see this. The fans are not driven by a belt. P68....

http://www.turboninjas.com/camry/eg2.pdf


- the thermostat may have stuck closed. You will have to get it out and test it, but this is not difficult. See p328


http://www.turboninjas.com/camry/eg2.pdf


- this model of Camry has a plastic top tank to the radiator, which eventually cracks. Look there carefully.

- it may be that a radiator hose has gone soft and closed up. Check they are allowing good coolant flow.

- it could be that in a car this age that the radiator has silted up and is not allowing coolant through. Disconnect the top and bottom radiator hoses, when cool, and run water through from a garden hose to get some idea about that.

Sep 29, 2012 | 1994 Toyota Camry

1 Answer

I have a 1991 toyota camry and i need to fix my water pump


There are other possible causes for that. The most obvious thing which you have done I guess is to make sure the coolant level is up, and the radiator hoses have not collapsed and become flattened instead of being round.

Then rapid overheating can be caused by a blown head gasket. You can check the coolant while the engine is running to look for white bubbles, like dry ice. That is hot combustion gases. The definitive test is a compression test, which you can do with an inexpensive tool, screwed into each spark plug hole in turn.

It could also be a failed coolant temp sensor, which will mean the fans don't run when the engine is hot.

Then a thermostat stuck in the closed position can cause this. That can be inspected by removing the radiator hose and thermostat housing.

If you feel it must be the water pump, that is accessed by the following procedure p242

http://www.turboninjas.com/camry/eg1.pdf


The V6 is eg2.pdf

Jul 26, 2012 | 1991 Toyota Camry

1 Answer

V6 CAMRY ENGINE OVER HEATING


Flush coolant system. Check temperature is actually overheating - sometimes it's a faulty sensor.

Sep 02, 2010 | 1992 Toyota Camry V6

1 Answer

I have a 2002 toyota camry V6 and did not pass


O2 sensors are a possible cause. It has one converter, but 2 oxygen sensors...1 upstream, and 1 downstream of the converter. Which means one is very easy to get to (under the hood, on the manifold), and one is not. Usually the check engine light will come on if O2 sensors are faulty.

Apr 02, 2010 | 2002 Toyota Camry

2 Answers

1993 Toyota Camry V6: Coolant Overheating Problem.


how do u change the water pump in a 1993 toyota camry v6 engine?

Oct 05, 2009 | 1993 Toyota Camry V6

1 Answer

HOW TO FILL RADIATOR ON V6 WITH TWO CAPS TO


Just fill the engine one and check in a day to top off the reservoir.

Jul 02, 2009 | 1993 Toyota Camry V6

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