Dealer replaced my Tensioner Pulley when replacing the HB a couple years ago. All seemed fine to me, but I think they might know more than me about those things. My 2 cents.wfontano said:Great information guys!
My Harmonic Balancer Pulley just gave in on me (outer shell --- one with grooves - - literally came off) and I'm contemplating in also replacing the Tensioner Pulley.
Is there a chance that by pulling on the center bolt u might loosen the bolt itself?Same topic goes in 210 section, that shares the engine.
The tensioner has big hex for pulling the tensioner out and smaller center bolt is locking it.
You need a long box wrench to take the tension off and than you can slip the belt off. I think for easier job you can pull the tensioner out and lock it in this position with smaller bolt, what would leave you 2 hands to deal with the belt, but I never actually tried this method. Sizes wary supposable 13-17 mm for tensioner and smaller bolts come with different sizes and shapes.
The tensioner pulley is just that, a tensioner pulley (#1 in illustration). The harmonic balancer (#2 in illustration) is also called the crankshaft pulley, but does not turn unless the eng. is running.O.K., driving home last night battery light came on & lost my power steering. Open hood, & belt is off all the pulleys. Checking the movement of all the pulleys, all turn normally with the exception of the tensioner pulley. I can move it forward & backward (is this also called the harmonic balancer?)
Do you remove the entire tensioner or just the pulley? My 99 320 appears that the tensioner is held on with male torx .