3.4 v6 5VZ-FE Thermostat

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02-02-2013, 05:27 AM

AlexJet

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3.4 v6 5VZ-FE Thermostat

Does anyone knows what is the Thermostat temperature for the OEM Tacoma 3.4 v6?

I'm trying to adopt an electric fan and need to know what sensor should I get based on thermostat temperature.

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02-02-2013, 06:11 AM

98SR54RUNNER

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Edit: It opens between 176º and 183º F and is fully open at 203ºF.

Attached Files

Engine-Hybrid System - Cooling (5VZ-FE) - Thermostat - Inspection.pdf (43.4 KB, 492 views)

Last edited by 98SR54RUNNER; 02-02-2013 at 07:01 AM.

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02-02-2013, 06:29 AM

rworegon

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^^^^ that's correct for the 180°F thermostat and it's fully open at 203°F.

Last edited by rworegon; 02-03-2013 at 05:47 AM.

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02-02-2013, 06:55 PM

vital22re

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Just make sure your jiggle valve is at the 6 o'clock position when you install it.

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02-03-2013, 04:25 AM

AlexJet

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What temperature is actually written on the thermostat? Is it opening or fully opened temperature?
I found one on the web, but it has 90C stamped on it.

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02-03-2013, 05:23 AM

rworegon

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Quote:

Originally Posted by AlexJet

What temperature is actually written on the thermostat? Is it opening or fully opened temperature?
I found one on the web, but it has 90C stamped on it.

82°C is stamped on the stock 180°F Kuzeh brand t-stat that came in the engine originally which is part number 90916-03075. 90°C is a 195°F stat and is a non-stock part for this engine.

Per FSM (Factory Service Manual):
"Valve opening temperature: 80-84°C (176-183°F)
Valve lift: At 95°C (203°F): 8 mm (0.31 in) or more

If the valve opening temperature and valve lift are not within specification, replace the thermostat."

Last edited by rworegon; 02-03-2013 at 05:48 AM.

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