OK, finished putting in the valve stem seals and remanned injectors/return lines. there are two screw in sensors sitting directly to the left of the valve cover near the front of the car (air cleaner side). I accidentally broke off the two line connectors coming out of the sensor nearest the valve cover. so, need to remove and replace with a new one.

question: what size and type of wrench will remove this sensor? it seems to be an 18MM but I am unsure. there is a "round" part just above the part where the wrench would go making it difficult to allow a regular wrench to get a grip.

- 1984 300DT