Re: Actual Coolant Temp
Fluke makes a good product, I use FLIR gun.
T-stat housing is going to include block heat AND whatever gun mfg'r you use, it's ONLY measuring surface temp.
If fluid temp is requested, the probe MUST BE immersed in the fluid.
SO you take a length of 1.5 inch OD tubing, weld on a block of steel, drill & tap for the probe threads and place the tubing in the upper hose.
Now it will show fluid temp when t-stat opens.
You can use the cyl head spots and they are pretty good, I used the OE drvr side for the light and used pass side for the add-on temp gauge.
But observe the probe-to-depth in head as the probe may bottom out against head then you will be reading block temp.
Or too many adapters and still read cyl head material temp. You want as much probe into the fluid as possibly can get, one adapter, not two.
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