where the most accurate place to get water temps. the top radiator hose area or the lower radiator hose area?

thanks

 

The top hose will read the water temp coming out of the radiator. The lower hose will read the temp after cooling down in the radiator. I would stick with the top hose...

 

or you could drill and tap the waterpump housing!

 

The stock sensor in the waterpump housing, is that for emissions?

 

has something to do with choke or emissions iirc.

I blocked it off on mine with the intent of using it later for a sending unit.


isaac

 

also beside that hole there is enough room to tap it again...for an aftermarket sensor

 

I have a water temp sensor for my ecu on the water pump location.

I allready put it all together and dont want to take it apart, hence the little autometer part 2283 and the hose question


http://www.autometer.com/cat_accesso...il.aspx?vid=52

 

Install it in the top hose so you can get a reading on the heated water exiting the waterpump. I made one of those out of aluminumn pipe and a brass fitting. Works ok.

 

mine is threaded into one of the existing tapped holes in the back of the w/p housing.

 

what size is your sender adaptor? 1/8 or 1/2?

 

what size is the sensor adaptor, 1/8 or 1/2?

 

Choke.

 

Top.

 

That statement makes no sense. The top hose will read the water temp going into, or towards the radiator.

 

I agree the top hose will be your hottest point other than taking a reading directly from the engine itself. Also do the sending unit screws directly into the water pump housing where the stock sensor is located?

 

How about one of these:









Details in this post:

https://www.rx7club.com/showthread.p...eadlights+make

 

Yep, I was asleep when I wrote that. Good catch man...

 

I'm there for ya.

 

Ray,

Mine wouldnt fit there, stuffs in the way.

 

It's a snug fit, but it fits:

 

Most accurate would be in the wp housing before the thermostat. It would also work on the upper hose but you would have to wait for the thermostat to open up to get an accurate reading. I originally had mine on the upper hose and decided to move it to the wp housing. I'm using mine for a cold start operation on a stand alone.


Ed

 

You might think so theoretically, but in practice the mechanical gauge tracks the stock electronic gauge so closely you can't tell the difference. Except the mechanical gauge keeps working when you turn the key off.

 

A small amout of coolant does get past the thermostat even before it opens (through the jiggle pin), so the neck (like Ray's) should be a decent place to put it. If you are no longer running the stock choke, then putting the sender where the stock thermoswitch was would be a good option.

 

Or you could put it where the stock one is, in the block.

 

I don't think the aftermarket probes fit in the stock hole. Mine didn't.

Besides, don't you want a second opinion on your 25 year old temp gauge?