A cam shaft of {HEAD ~ an engine} is provided with {TAIL ~ a timing change mechanism} which is driven by hydraulic pressure to alter the timing of a intake valve  
A cam shaft of { HEAD ~ an engine } is provided with { TAIL ~ a timing change mechanism } which is driven by hydraulic pressure to alter the timing of a intake valve
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH