Use a long 3/8 rachet or 3/8 breaker bar. The 3/8 square end will go into the slot on the tensioner
The easiest way to loosen the tensioner is to use an automatic belt tensioner. This can be used on a serpentine belt which is connected to every pulley on the engine.belt.
On the tensioner arm there is a bolt holding it there. To the right of the bolt will be a square cut into the arm of the tensioner, use a 3/8 inch socket wrench (no attachment, just the wrench itself) and turn to the right this will loosen the belt to remove it.
What side do I turn the tensioner to loosen it?
The 2005 Nissan Altima auto tensioner pulley can be removed by removing the center bolt. You will need to hold the pulley stationary while you loosen the bolt.
You can change the serpentine belt on your Chevrolet trailblazer, by loosening the tensioner pulley. With the loosened tensioner pulley the belt will come off easily. Tighten the new belt with the tensioner pulley.
Probably not the air pump. Could be the power steering pump or the tensioner pulley or maybe the idler pulley.
With a socket wrench-place it over the nut that holds in the tensioner and slowly pusn to the left to loosen
2005 5.3 trailblazer I have removed the ground wire , power wire and lower 2 bolts on the front, but it seems that something is still holding the alternator in place. Can you tell me what else I need to loosen to get the altnator to come loose?
Place a breaker bar on the lug/hole on the tensioner; then pry against the tensioner.
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The 2005 Trailblazer has a 22 gallon tank.