Best Practices for VW Audi Cylinder Head Rebuild

Lately, we’ve noticed a growing number of valve failures being reported for certain VW and Audi vehicles, in particular those with the 1.9L diesel TDI and 1.8T gasoline engines.

After reviewing many cases of these failures, it turned out that the problem was not with the valves themselves, but with the method of cylinder head overhaul. Most failures occurred shortly after a rebuild, and appeared to be mainly attributed to the poor adjustment of the hydraulic lifters.