Tappy gti

[Ruan]

Remember, theoretically as long as only one cam slips, it's acutally quite difficult to bend the valves as in valve>valve contact rather than valve>piston contact, since the crank pulley locks off at MDC so the pistons are all in the middle of the bores, and at that point in the stroke, the valves will be pretty much either mid duration or closed, not half way through, so even if one slips you'd probably find it hasn't touched valve>valve...

I'd suspect what's happened is that the bottom pulley has slipped, and it's bent them VERY slightly..