Pulled apart the timing gear off a S/H engine and found the belt was riding off to the engine side (scraped the platics a bit). About 3-4mm.
Does anyone know why and how to correct it?
I don't find this normal, so I am looking into some sort of fix. The only bit that has a guard/guide to it is the crankshaft sprocket so I guess that will determine where the belt rides. I was thinking of using some sort of spacer behind it to make sure the belt rides centered on all other ancillaries. The sprocket is wider than the belt though, so not sure how much it can help.
This may not fix the problem, but hope it will alleviate the effects.