take the top cover off. time up the engine two top timing
marks should be facing out side top edge of the cylinder head bottom pully has a nick in it has to face bottom at six oclock position. put a jack under the engine driver side
loosen engine mount driver side take cover off side will see timing chain. timiming chain tensioner at the back of the engine above at nine oclock position make hook out of welding rod to hook off tensioner. chain will go slack take the cam out you wish to remove then replace part if you know which one.YOU MUST REPLACE THE PLASTIC
CHAIN GUIDE AND THE HYDROLIC CHAIN TENSIONER.
if you go on the net euro parts will supply the parts cheaper than ford have to do the same job on my glx
hope this will be of help.
chris
April 2010