81' GTD CY glowplug questions again, is there a temp sensor

[fighting_First]

somewhere that I should replace. Others mentioned the ignition circuit has a temp sensor which turns off the glowplugs. Is this correct, if so where is that sensor located exactly?

Until recently the car only had 3 sensors, 2 (brass) water temp sensors and another (oil pressure?) on side of the head. Recently I located a new oil cooler housing with the oil sensor hole tapped for the 4th sensor. My assumption was this sensor was for the oiltemp gauge in the cockpit, is this correct?

Does anyone know the part#s for these sensors and possibly a # on the GPs? 1.6TD CY block with a Hydo head conversion.

Thanks,
Sean

[zukgod1]

I dont know the part# but it's one of the 2 on the front water neck off the head.