{HEAD ~ The sensor}, although located in the spark plug access well, is not physically in {TAIL ~ contact} with the spark plug 
is not physically in
{ HEAD ~ The sensor } , although located in the spark plug access well , is not physically in { TAIL ~ contact } with the spark plug
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH