The sensor is located in {HEAD ~ an engine component opening}, such as a spark plug well, and is engaged with {TAIL ~ first and second walls} that define the ends of the opening 
The sensor is located in { HEAD ~ an engine component opening } , such as a spark plug well , and is engaged with { TAIL ~ first and second walls } that define the ends of the opening
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH