'90 Toyota Cressida Radiator Problems

run the fault codes to find the faulty sensor

You have a blown head gasket that needs to be replaced. The head may be warped too so it's not an easy job to do without the proper tools and parts.

For many of the 90's and 2000's Toyota various models - Camry, Tacoma, 4 Runners, Corolla, and some other models overheating is usually caused by temperature sensitive fan switch on the radiator not operating. Electric fan on the radiator should operate when temp above 200 degrees. Less often the control relay 90987-03003 is defective. Check if bubbling in the radiator smells like exhaust. That would indicate a blown head gasket. A jumper wire from your marker light positive to the lower contact in the fan control relay socket will operate your fan when parking lights are on. The larger vehicles with more powerful radiator fans will need a hefty jumper from a headlight positive to avoid overheating the lighting wiring. Make sure the engine is off and warmed up to check the radiator core with your hand to see if it is getting circulation. If it is all cold the thermostat might be stuck.

The low pressure lines are larger. Follow the larger line from the compressor to find the low pressure port.

It really seems like you'll need a radiator. The rad can appear to have good flow because even if it's plugged, coolant will bypass the cooling fins. If you can get at it, try putting your hand on the surface of the radiator when the engine is hot but not running. The rad will fell relatively cool across the surface if it's bad...hot if coolant is flowing through the core. Those hand-held laser thermometers are handy for doing this as well.

If it has push rods, you will find them under the rocker cover on the top of the engine, they are hiding under the rockers. The rods ride on a lifter that rides on the cam and then they push the valves down, and squirt oil all over everything, a spring brings them back up. The overhead cam eliminated all these extra parts. Lifters, rods, rockers. Hope this helps.

THE AUTO PARTS PLACE WILL LOOK IT UP FOR YOU.TELL THEM YOUR CAR MODEL YEAR AND ENGINE SIZE THEY DO THE REST.

Cooling Thermostat.
Look along the radiator hose where it enters the engine. This controls the water temperature.


Toyota Celica Thermal Fan Switch The Toyota Celica thermal radiator fan switch is usually located in the radiator or the engine block and has 2 or 3 wires coming from the unit. The 3 wire switch has a dual sensor for dual speed radiator fans. The Toyota Celica thermo fan switches come in the factory temperature settings and also come in cooler thermostatic settings so the fan will come on at a lower coolant temp.

The Toyota Celica cooling system is made of aluminum components and requires a Phosphate free coolant. DO NOT PUT an over the counter antifreeze in your Toyota Celica, as it will ruin the radiator and water pump.

Your cooling system is what keeps your car from having a meltdown. If you didn't have some way to cool things off, your engine would turn into a solid block of useless metal in no time flat. All of the parts that make up the cooling system have one goal of moving coolant around the engine so it can absorb and dissipate heat. The basic system is made up of the following components:

1. radiator
2. radiator top hose
3. radiator bottom hose
4. water pump

from your problem u stated
Checking for the problem I saw some a lot of antifreeze on the bottom of my engine covering or whatever it is (not the hood).
looking at the parts involved its probably not burning in the engine unless the car has overheated to much, it sounds likes its one of ur delivery or return hoses from the motor that is leaking. do a close attention to detail to your hoses and components related to the cooling system, u may not see the leak from the top since gravity will draw the fluid down