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We have a '95 4Runner with a 3VZE engine whose temp gauge indicates it is overheating but we do not believe it is actually overheating.

New hoses, belts, thermostat, temp sensor (to the gauge) - a lot of work.

We got it all back together and took it for a test drive - the needle went entirely to the red area within a few blocks but there were no overt signs of overheating - no rattling of the valves, the engine ran smoothly and power remained the same. When we opened the hood no steam, no hissing etc. It just didn't "feel" hot in the way past experience with overheated engines did. I now suspect the gauge (or wiring) has an issue.

Do we try an aftermarket gauge? Does anyone know if we have to change the sensor AGAIN? They are such a pain to get to on the 3VZE.

Here is our original post with info on where the sensors are.
 

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rock crawler
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You can check the gauge using an ohmmeter.
Just pull the gauge cluster and measure the A, B, and C terminals in lower right corner.
A to B should be around 57 ohms
A to C should be around 135 ohms
C to B should be around 217 ohms
 

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92 4Runner location of temperature sensors

I have a 92 4Runner 3.0 V6 4x4 SR5 I replaced:
1. Coolant temperature sensor (green arrow);
2. Coolant temperature switch (white arrow);

I want to replace the wiring harness (red arrow).

Question: Can someone tell me if the sensor (red arrow) is the knock sensor?

Your help is greatly appreciated.
 

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rock crawler
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No, I don't have FSM handy, but IIRC the knock sensor on the V6 is under the intake manifold.
On the 4 cylinder it's equally hard to get to.
 
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