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Old 11-09-2006, 10:33 AM   #1
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Loosening Cam Sprockets - Timing Belt

Getting ready to do a timing belt change out on a Zetec and have a question on loosening the cam sprockets. The factory service manual indicates that this must be done in order to get the belt on but Iíve talked with other Focus owners that managed to change the belt without loosening the sprockets. I have the bar that holds the cams but I would still rather not disturb the cam sprockets unless absolutely necessary. Iím guessing that without the sprockets loose there is a greater risk of damaging the new belt from having to pry on it a bit to get it over the sprockets. Any opinions for or against loosening the sprockets?

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Old 11-09-2006, 06:01 PM   #2
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You can't use that bar to hold the cams still so you can loosen the sprockets if you decide to do so. The cams should be milled for a 21mm or 13/16 box end wrench to fit. I think that's the size, I can't remember, but you should be able to see the place where it's milled for a wrench to fit the center of the cam somewhere- I think between cap 1 and 2. You'll break the back of the cam off if you use that bar to hold the cams still.

I don' t because I haven't done one, but nobody else is answering you. From my other timing belt experiences- I don't remember a serious problem with doing the job. I'd try it, and if you must loosen the cam sprockets in order to get the belt on- then you know what to do. Zetec cam sprockets should be keyed so it's not like you're going to turn one so that it doesn't line up any more.

You've probably already figured all that out anyway, but I didn't want you to feel shunned.. LOL
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