Hello. First timer here.
I have 93 Camry wagon 3VZ-FE 3.0
After sitting at a normal operating temp for about 10-15, the gauge begins to climb all the way into the red while either parked or driving.
The following have been replaced: radiator caps, thermostat ( twice ), coolant temp sensor, coolant flush ( multiple verifications that there is no air in the system ), oil and plugs look good, and the fan is operating normally.
Additionally, I bought temp gun. When the car is at its normal operating temp according to the gauge, the engine reads about 150 degrees F. When the gauge is in the red the engine reads 200 degrees F. What is a high temp for this car?
Any and all thoughts are greatly appreciated!

 

Check temp gauge sensor resistance.

Nippon Denso brand approx 226 ohm @ 122°F. Approx 26.4 ohm at
239°F.
Yazaki brand approx 152.7@140°F. Approx 26.4
239°F

The fan RPM should change with coolant temp. Make sure the fans are rotating faster as the coolant temp increases.

Try inserting a thermometer into the radiator to record actual coolant temp. The T-stat should start opening at 180F. Normal coolant temp is around 187ish. The fan should be running at around 199F but have no exact number.

Note this engine is known for blown head gaskets which can cause overheating due to exhaust gases in the coolant.

 

after all that work and no better

no coolant on the oil dip stick

test strips can be bought to see if C02 is in the coolant

head gasket leak or between cylinders or the inlet manifold gasket blown

tired temp fans spinning slow ..can be replaced with after market

 

Do the fans come on?
I suspect engine temp sensor.
Like Dirty hands suggests, there could be a blown head gasket. Don't push your luck with and engine that is overheating. It doesn't take much to cook that head gasket and warp a cylinder head.