Together, cylinder head lower wall 16 and {HEAD ~ piston upper portion} 18 define a combustion chamber 19 for {TAIL ~ each respective cylinder} 12 
Together , cylinder head lower wall 16 and { HEAD ~ piston upper portion } 18 define a combustion chamber 19 for { TAIL ~ each respective cylinder } 12
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH