I am in the process of putting a rebuilt engine in a friends '85 380SE. I was very careful to mark and catagorize all parts pulled from the old long block to transfer to the rebuilt one. I seem to be missing (I think!!!) a temp sensor that goes in the right (passenger side) cyl head, at back of the head, right close to the heater hose pipe on the block. This tapped hole in the head goes into the water jacket of the cyl head. I don't know if a sensor or a block off plug goes into this hole. I think that I might have left it in the head when it went to Metric Motors for the rebuild but I am not sure. It is NOT like me to lose parts like this.
Can someone please tell me if a sensor or a plug goes into this hole for this particular year and model??
If it is a sensor, What one is it and would you have the part number?
Thanks in advance for the help and I am thankful for this site. Chris

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.