Quote:
Originally Posted by ah-kay
Thanks for the confirmation. The 12mm center bolt is a press fit and no way you can remove the tensioner without removing the water pump pulley. When you remove the pulley, you need to drain the radiator and remove the radiator. The list goes on and on. I then butchered up the 4 6mm allen bolts that held the wp pulley in place. It was a ROYAL PAIN in the A$$. Whoever designed it should be held accountable.
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I don't understand why the radiator is removed, are you saying the fan and it's clutch can't be removed because the radiator is in the way? just looking quickly at the 601 FSM there should be 90 mm between the front of the fan blades and the rear of the radiator, that's more than 3 1/2" of space between them, more than just about any Mercedes I've ever seen!
Remove the shroud or at least release it and move it out of the way, remove the center collar screw and the fan comes off, carefully and thoughtfully remove the four Allenhead bolts and pulley should be able to be pulled off, you might be able to get the tensioner off then if it will fit past the magnetic coupling, if not unbolt the coupling from behind disconnect the wiring and that will pull off, then the tensioner should get past easily.
This serpentine tensioner is a piece of cake compared to many others, you can actually see what you're doing!