Remembering why I
dislike working on
AO Silver Member
Join Date: Sep 2001
Hah! Confess that was a total guess!!
Inlet runners and coil packs are completely interchangeable. Well, of course, there are two shapes of inlet runner....but no problem swapping within a shape IYSWIM.... I guess a slight air leak on one cylinder might be the cause, given you've hadf to strip it a few times. Have you got an OBD reader? Might be able to narrow it down to one particular cylinder if you have.
Indeed, the tensioner will move about quite a lot as you slowly rotate the engine - the tension round the belt changes a lot as individual cams open and close valves. One point they are pulling, the next they are pushing, so it's all over the shop. Should steady down as the engine runs, and should be close to the reference mark.