weird overheating issues

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Nov 11, 2011 | 08:32 PM

wirelesstj

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From: az

weird overheating issues

so today while driving around my temp gauge was doing something very weird. it would go from the middle all the way to hot and then back to the middle. is this an electrical issue or was it overheating? its really hard to tell if it was over heating or not since i dont have a coolant temp gauge

Nov 11, 2011 | 10:35 PM

1SICSC4

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From: FL

It is your engine coolant temperature sensor. (sometimes called a master sensor) If you have a 400 it is the electrical connection by the inlet tube from your radiator. check the connection and sensor. I think you can get the part from an auto store for under $20 and you can do it your self.

Nov 12, 2011 | 06:57 AM

wirelesstj

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From: az

cool thxs so much. i actually drive a 300 with a 1j swap so is the location of the sensor still in the same spot?

Nov 16, 2011 | 11:26 AM

wirelesstj

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From: az

well found out it wasnt the sensor...it was actually overheating! looked in the radiator and there was not coolant. topped it off with water, started the car and was driving fine. then when i parked it i found a water leak. it appears it was coming out the water pump. oh joy! -_- gonna work on that this weekend. hopefully its the o-rings and not the pump...

Nov 16, 2011 | 03:04 PM

INTIMAZY

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From: NY

Glad ya found it. I had the same issue minus the leak. What was it? Air in the system

For such a simple layout these systems are quite a ****** to bleed. (1JZ specifically)

Nov 16, 2011 | 07:39 PM

chingpo05

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From: texas

how long did u overheat for? you could already have damage to your head gasket

Nov 17, 2011 | 08:17 AM

wirelesstj

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From: az

hardly overheated at all. i would stop preiodically and let the engine cool down cause i wasnt quite sure what was going on and i wanted to be on the safe side.

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Nov 17, 2011 | 11:03 AM

wirelesstj

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From: az

its looks brand new but i know what your saying. i've been pondering that for a good couple days whether i should change it out or not even if its just an o-ring leak