Does anyone know the star bolt & nut sizes of the E350 ???? I see several bolts and nuts sizes on the engine parts ....I'm trying to replace the V-belt for my car.... Need to know the star bolt size so I can get the right socket for it.

 

On The Mono Belt Tensioner one can use a 12 point socket as well

Also You should use a pin to hold the tensioner retracted while you replace the belt