i put an autometer temp gauge in my car last month and left the stock temp gauge unhooked because i had no place to put the stock sending unit. at this time the temp read about 190 degrees normally on my autometer gauge. yesterday i put a T in the head so i could use both the stock temp gauge and the autometer one, but now the temp reads inaccuratly. it reads about 150 degrees max now. this is because the temp sending unit isnt straight in the head anymore. it is in a brass T instead. does anyone else have this problem? is there another spot i can tap into to have both temp sending units screwed into the head?

 

Water temp probes need to be exposed to circulating water, which it doesn't see when you use a T.

 

so there is no way to use both gauges? =/

 

I don't know if there are any stock holes you can use, but you can always drill and tap one yourself. I don't recommend doing that with the engine in the car though.

 

Drill and tap your Autometer sender into the flange where the upper radiator hose goes into the head. This will give you a nice reading of the water temp after it has passed thru your radiator.

You should understand the stock gauge is not that accurate. While your car is warm and the stock gauge goes to its usual spot right before the halfway mark, you will see the massive flucuations of water temp from your Autometer gauge.

 

I find water temp readings before the rad much more useful, there's really no point to knowing the water temp after it's cooled through the radiator. I don't know how to easily tap for that on a honda block though.

 

Bleh, you can have it. Go ahead and find a location behind the head. It's alright though, I think my car should be fine when I'm averaging 170F after running it hard.