The oil pan of the Volvo P1800 or P1800ES models has a thread for the oil temperature sensor. Spare oil pans are hard to find.
With our adapter 418649 you can retrofit the thread at all B18 or B20 oil pans by welding in the adapter.
The correct position of the thread is on the right side. The threaded center has a distance of 75mm from the upper corner and 85mm from the rear corner.