Step 2: Loosen tension and remove belt. The tensioner pulley is spring loaded to provide automatic tensioning to the serpentine belt. Most serpentine belt systems use an automatic spring tensioner, while others use a manual adjusting tensioner.

Step 12: Tighten the tensioner pulley and tighten the bolts. Using the same method as above, apply pressure to the tensioner pulley until the belt is tight on all three access points. Maintain pressure on the tensioner pulley and tighten the bottom then top bolts to tighten the power steering belt correctly. Step 13: Hand test the belt

^{The advantage of a serpentine belt is that it has more surface area than a v-belt. The other part of the equation is the tension of the belt. Tension can increase the coefficient of friction, but too much can cause power loss and even increased wear to the belt. An engineer could design a belt system that would never slip or wear out.}

The belt tensioner on the Nissan 4.0L V6 (VQ40) found in the Nissan Frontier (2005 and up), Pathfinder (2005-2011), and Xterra (2005 and up) does not properly tension the belt over time, which is what causes the annoying squeaking noise because the belt is slipping in cold/damp conditions. I highly recommend also replacing your serpentine belt

Things You Should Know. Open the hood of your car and locate the fan belt, usually at the front of the engine. Start the car. Then spray belt dressing directly onto the fan belt until the entire length is wet. Let the car run for a couple minutes, and apply more belt dressing if the belt continues to squeak. Method 1. Sometimes a new belt is so tight it won’t fit over all of your pulleys and you don’t have a belt install tool. In cases like this you can try getting it part . 300 295 276 248 162 49 365 185 226

how tight should a serpentine belt be