Join Date: Jan 2015
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The tensioner is spring loaded and automatically adjusts itself. It's possible your belt just stretched out without cracking....but they usually do crack first. There isn't really an easy way to measure this. If the belt is OEM, you can look up the length, take the belt off, run a string around its length, and then measure the length of the string to check against the length it is supposed to be. <br />
Some advice if you do this: Do NOT use a 12 point closed wrench or an open wrench to adjust the tensioner. The nut you pull against is cast aluminum and part of the tensioner and you are likely to round it off. Only use a 6 point closed end wrench with a tight clean fit. I'd suggest getting the longest one you can find too, as it takes considerable force to loosen the tensioner and get the belt off. Socket wrenches won't fit on it due to clearance issues.