Quote:
Remove guide rail at top (42). NOTE: If the top cued guide rail (42) is taken out of its mounting, the pressure pin in the chain tensioner is moved one detent in the pressure direction. The chain tensioner must be removed to avoid the timing chain being over-tensioned.
So If I remove the top guide rail that is attached to the timing cover, Am I going to have to remove and reset the tensioner?
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Yes.
Once the pin is released, the chain guide on the tensioned side relaxes and the chain tensioner will take up the slack.
Kestes is correct in saying that, "the tensioner has a one-way ratcheting mechanism inside of it". (ie it can't slacken if the chain becomes too tight).
Therefore, you
MUST remove the tensioner....otherwise the chain will be over-tensioned when you re-insert the pin.
AFTER you have reinstalled the timing cover and pin...you then may reinstall the tensioner...after reinserting the one way element of the tensioner.
(The author has done this specific job three times already!).