Hi all, I've been banging my head against this engine for weeks now. First it was a bad rebuilt head with loose precups, and now with a new head I find that the timing belt wants to creep forward and the flange for the intermediate shaft cog is cutting the edge off it. What gives? I center the belt on the cogs but as the engine rotates it moves forward. I've lost about a mm off the front edge of this belt after only a few 100 revolutions. Anyone ever encounter this? It's a 1.6 Jetta TD.