Yesterday my car started to over heat while I was on the freeway so I pulled over and my fans where not working so I unplugged the relay to the fans and my fans worked fine after that cuz now there on constantly, I know my relay went out so I have to get a new one.

I thought that would fix my problem but my car still over heats , even though the fans are on automatically I don't know what could it be. Can you guys help.....................

 

It sounds obvious but did you check the coolant? You did not mention this so I must ask.

Other then that look for leaks. Have a pressure test performed. Check the condition of your oil for obvious signs of coolant contamination.

 

Sorry it has enough coolant on the radiator

 

Possibly a bad thermostat that's stuck shut. Good thing you have a 2JZ, it's very easy and takes a whole 5 minutes to change it out

 

Cool I will try that and hope that works.

 

Where is the thermostat located on the 2JZ?

 

See the hose going off the radiator next to the cap and to the top of the engine? That'd be where the thermostat is.

Big Mack

 

The thermostat isn't inside that pipe though is it? This must be real simple, but I've never changed a thermo in the 2JZ before.

 

correct me if im wrong but isnt the thermostat somewhere near the water pump?you should see a dome shaped pipe.

 

To check the thermostat is working, let the car warm up to normal operating temperature and check both the upper and lower radiator hose. They both should be warm to touch. If one is cold and one is hot, thermostat is stuck. From my point of view, you should do a coolant pressure test see if its leaking else where. Check radiator cap to see if it holds pressure. And if it happens to overheat mostly when sitting at a stop light or at idle for a long time, it's time to change the radiator. GL!

 

To the OP, what type of fluid are you using in the car to cool the engine? Could be the fluids as well, if they can't handle the temperatures.

 

Here you go. This should help visualize it.

EDIT: 2JZ-GE

 

Might be easier this way.

 

I don’t have the N/A engine any more I have and actually TT engine so the thermostat is located somewhere else. is next's to the turbos.

 

2JZ-GTE