Coolant Temp sensor location...

[Anonymous]

Originally my coolant temp sensor was threadedinto a T that came off the block. Clearly done by PO. I was unsure about whether totry to remove the T as it is soft brass.

My temp gage always seemed to work real slowly and lag badly based on engine temp at the radiator hoses as tested with a pyrometer.

So I took the sensor and put it on the part the radiator hose goes into at the front of the block.

Should I put a second gage in the back again? Or is directly in the collant stream okay as it is? If it overheats will this work correclty to show me the overtemp?
Cheers,
Steve-O
Pic is of new location for temp sensor.

 

[Anonymous]

Hey Steve-O,

The place that you put the sensor is in front of the thermostat (radiator side) which will only give you the temperature of the coolant after the thermostat opens and coolant flows to the radiator which is NOT going to give you the accurate temp of the coolant in the block. The "factory" and recommended location of the coolant sensor is in the back/drivers side of the cylinder head behind the #6 sparkplug. I'd use "that" sensor location and the guage should work correctly. Let me know if this helps or if you need any more info.

Eddie

 

[XFlow_Fairlane]

steve-o I had my autometer electric mounted in the stock location at the back of the block. it seemed once warmed up it would read about 10 degrees cool. the water at the back of the block is some of the coolest in the motor. I moved my fan switch there and the temp sender to the outlet on the head (used a male-female-female tee) I don't have the senders hooked back up since my car always ran cool and it is winter here.

 

[MandarinaRacing]

What about on the head, next to the #1 exhaust port location...would it read hotter or colder than what it is...????

Alex

 

[Anonymous]

I guess based on the replies I'll add another gage to the back.

This is the location at the back of the block. Clearly not going to get good flow or temp transfer with that brass fitting. So I'll have to carefully remove it and try to fit a sensor for another temp gage in there.

Thanks for the replies.
Steve-O

 

[Anonymous]

Hey Steve-O,

That T-fitting will have to go when it comes to a temperature guage. It won't "feel" the correct temperature of the coolant flowing through the head/block. That long T is acting like a dead-end of stagnant coolant plus the pipe will cool down(radiate) the coolant somewhat. T-fittings are OK for oil pressure guages but not for temperature unless the T was inside the water passage (head/block). Hope this helps again and thanks for the pictures. That helped alot

Eddie

 

[strat1960s]

Steve O'

I'm running both temperature sending units. So here goes.

On the very back-left corner of the head is the original coolant port. I am using that one for my "idiot light" sensor.

On the head, just behind the thermostat housing, on the right side is a coolant port. My mechanical temp sending unit threaded right into there. If you want, send me your email and I will send pictures of my setup. It's very simple.

Ted

 

[Anonymous]

steve...thats an odd fitting there... mine goes directly into the block. I think yours would give inacurate readings....