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First remove the engine plastic cover by removing the bolts that hold in. Then loosen the nuts at the front of the AC Belt and Power Steering Belt. Now use a Socket set and loosen these two belts by turning the tension adjustment bolt, Anti-Clockwise.
You have to remove the first two belts (AC & Power Steering) before reaching the Serpentine Belt.
Now loosen the nut on the front of the lowest pulley before loosening the serpentine belt.
To loosen the serpentine belt, you could either remove the metal skid plate at the bottom of the engine by turning the tension adjustment bolt, Anti-Clockwise or reach down from the top and loosen it with the socket set ( quick & easiest)
the serpentine belt drive system has a tensioner pulley losing the bolt wont help you have to put to belt on as it shows on the diagram on the fan shroud while rotating the tensioner to loosen position hold pressure on it put the belt over all the pullies then on the tensioner once the belt is around all the pulley and the tensioner rotate the tensioner to tighten the belt...hope this helps
Really don't need a diagram. Loosen the slide bolts on the power steering pump. loosen or tighten the pump by turning the jack screw (long transverse bolt) under the pump. Once the belt is tightened up, lock down the slide bolts and you are finished.
check if it has a tensioner, it look like a useless pully and put a breaker bar on it and pull it and the belt should loosen up, if theres no tensioner the alternator should have bolts to loosen up the belts.
the 4.0 didn't come with a spring type tensioner if look under the p/s pump there is a jack bolt hooked to a idler pully loosen nut on front of pully and lossen up the jack bolt till you can get the belt off
The 6g72 has 3 belts. the Alternator belt is loosened by a horizontal bolt on the tensional pulley just to the left of the crank pulley. it will move the pulley down and loosen the tension. the power steering belt is loosened by a 14mm bolt on a bracket up and to the left of the crank pulley its a very unique bolt not hard to spot. the Timing belt is loosened by loosening a bolt on the tensioner pulley (it will have 2 small holes on it and will be above and left of crank pulley and right of the hydralic tensioner. contact me at firstname.lastname@example.org if you need pictures.
When you replace the AC belt you really should replace the serpentine belt as well, since you will have to take it off already. If you don't do it now it is inevitable that you will have to replace it in like 3 weeks anyway : )
You need to first remove the serpentine belt by loosening the nut in the center of the idler pulley. After that you will need to loosen the push bolt on the side of the idler pulley. The hub bolt is a 15mm size and the push bolt on the side of the tensioner is a 13mm I think. After you loosen it sufficiently, you will need to pull off the old belt.
Next you will need to loosen the tensioner pulley for the AC belt as well. It is the same process. The main issue is space. You will most likely need to raise your car to get at the right angles to loosen these pulleys.
Once you loosen the idler pulley in the same manner as you loosened the other, you can slip the AC belt onto the back of the crank pulley and route it as the diagram under your hood instructs you. Next tighten up the idler pully in the opposite way as you loosend it...tighten up the push bolt until the belt play is within factory specifications, then tighten the hub bolt in the center of the pulley. Do the same for the serpentine belt and you should be up and running in no time. I just performed these tasks on my 2000 300m and I wish someone would have told me this before I started my project. Hope this helps, Good Luck!