Thanks for the reply,
The crank cog does have a washer which is on the engine block side only (I think it is like this in these engines).
The belt does starts slipping out from the cam timing cog
The tensioner assy consist of a bearing, 12mm bolt, spring and a metal arm which goes under the bearing in a way so it can rotate it in order to tighten the belt.
Am i missing something?
As I dont understand the part
"the only thing that can actually force the belt off the cogs is a bent timing belt tensioner arm where the roller connects to."
what should I replace?