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You can see the drivers side bank on Left and passenger side on Right side of picture
On the right side, you will notice the when the big black crank pulley rotates clockwise the back chain is pulled up from the bottom so the bottom gear spins clockwise, the water pump, passenger exhaust cam, variable intake cam(oil pressure activated) then right next to it is the passenger side hydrualic tensioner, then a guide gear and then back to the crankshaft pulley.
The drivers side bank however has the bottom gear spinning clockwise so the front chain spins clockwise and puts tension first on the drivers variable inlet cam gear, followed by the exhaust cam and then onto the bottom hydraulic tensioner which gets oil pressure nearly straight off the oil filter before the chains goes back to the bottom gear.
Notice the drivers side has the tensioner and cam gear seperated by quite a difference? The passenger side though has the tensioner and AVCS gear right next to each other.
The passenger side AVCS is 'after' the exhaust cam while the drivers side AVCS is closer to the crankshaft(count the chain links
) You will also notice that the two tensioner bars have different designs, the bottom one has 9 links of chain between the black pivot point and tensioner while the passenger side has 4 links. Physics tells us that the passenger side chain tensioner would need to exert more force on the chain to get the leverage needed to keep the same tension as the bottom tensioner.
This is why the passenger side tensioner is so prone to issues! It has a lack of consistent oil pressure due to its AVCS cam solenoid neighbour, it has to exert the most amount of force to account for its small leverage distance and also has to deal with the most amount of mechanical drive(water pump) so it IS the hardest working component in the 3L H6's engines!
