Tapping Evo9 thermostat housing for an additional 1/8" NPT coolant temp sensor?

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Aug 7, 2013, 02:33 PM

#31

EGbeater

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Quote:

Originally Posted by browningderek

Ya know.... an easy way to add a sensor is make a metal pipe to put in your upper rad hose. The just weld a bung to it. Done.

I wasn't looking for the easiest way to add a coolant temperature sensor; I was looking for the best way to do it.

From my very first post in this thread:

Quote:

Originally Posted by EGbeater

I know it's possible to install a coolant temp sender in the radiator hose with an adapter available from Prosport or Greddy, but I'm not a fan of that method for two reasons:

In the case that the thermostat sticks shut (or partially closed), I won't know I have a problem
Cutting into the radiator hose to install the adapter adds two full hose-circumference areas of potential leaks

And from just a few posts up:

Quote:

Originally Posted by EGbeater

having the sender in the top half of the T-stat housing means you're reading temps AFTER the thermostat. In the rare situation that the thermostat sticks closed, your coolant gauge will be reading cold/normal temps, while your engine will actually be massively overheating. Not what I wanted.

There is a very good reason Mitsubishi put their coolant temperature sensor in the BOTTOM of the thermostat housing, before the thermostat, and not after it.

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cerevo (Jan 31, 2019)

Aug 7, 2013, 02:42 PM

#32

browningderek

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Yea I gotcha man. But that is the right way.....once the thermostat opens there will be no difference in temp reading in either location. What I meant was I think your making it more complicated that it needs to be.