The Ford Barn - View Single Post - Aftermarket Mechanical Temp Gauge Hookup Location

KULTULZ · 07-26-2025, 02:51 AM

The only way to read correct coolant temp on a FYB is to place the sensor directly behind the thermostat.

Why engineering put the OEM sensor on the rear of left cylinder head only read coolant temp coming off the LS cylinder barrels cooling jacket and not sensing the cyl head temp is beyond me. If the engine had a cooling problem, you wouldn't know until damage(s) has occurred.

Now they put a hose nipple on the 1957 E-CODE 8V intake coolant crossover.

The sensor has to be mounted on the intake coolant crossover behind the thermostat.

The early 1958 FE had the coolant temp sensor mounted in the by-pass hose.

Something like this should work (IMO) if you have a period intake you don't want to butcher ... er ... modify.

07-26-2025, 02:51 AM	#9
KULTULZ Senior Member Join Date: Aug 2012 Location: IN A GALAXIE FAR, FAR AWAY Posts: 7,386	Re: Aftermarket Mechanical Temp Gauge Hookup Location The only way to read correct coolant temp on a FYB is to place the sensor directly behind the thermostat. Why engineering put the OEM sensor on the rear of left cylinder head only read coolant temp coming off the LS cylinder barrels cooling jacket and not sensing the cyl head temp is beyond me. If the engine had a cooling problem, you wouldn't know until damage(s) has occurred. Now they put a hose nipple on the 1957 E-CODE 8V intake coolant crossover. The sensor has to be mounted on the intake coolant crossover behind the thermostat. The early 1958 FE had the coolant temp sensor mounted in the by-pass hose. Something like this should work (IMO) if you have a period intake you don't want to butcher ... er ... modify.