Does any one know how to tension a cam belt on a st170 engine i have tried to tension it up but when tensioner bolt up it still has a sprung movement is this right and arrow thingy moves i am only used to silver top engines that have a different set up any help would be apreciated thanks.

You position the ponter in the centre of the square window, then nip the pivot bolt up. Turn the engine over a couple of times, then recheck the pointer, if still in the middle of the suare window, torque up the pivot, if not repeat, job jobbed.

Pete.

[Edited on 17/5/09 by r1_pete]

Sorry forgot to mention you use an allen key to turn the tensioner to move the pointer.

Thanks for that help i wasnt sure if it was right it seemed floppy to me.