Originally posted by dbbubba:
The text reads like the spring pulls the tensioner tight keeping the belt tight, but it doesn't! In fact, the engine was manufactured without a spring on the tensioner.
The spring is for pre-assembly tension. The tensioner is a typical cam eccentric mount. The bolt is not under a lot of stress because of the relatively small radius of exertion.
If the backing plate is secure and does not vibrate, I would say that the tensioner bearing may at fault. As long as the bearing operates smoothly, the moving belt will not exert rotational force on the tensioner bolt.
Over tightening the bolt will lead to breakage, so beware.
"Those who cannot remember the past are condemned to repeat it" -George Santayana
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