The instance of piston striking valve is right up at the top of the list of things that will ruin your day. It's fundamental tothe four-stroke cycle that valves and pistons come close to one another, ...

A small gap with big importance in the performance and health of an engine - here's everything you need to know.

In an engine, the relationship between the valves and the pistons is a precarious one. If there is too little space, they can collide. If this happens, the resulting carnage require replacing one of ...

Time was when a valve job was done with some valve-grinding compound and a vacuum cup on a stick. But no more. Today's high performance engines require the same machining precision in the valves that ...

My 2012 Mitsubishi Triton diesel has just had its 30,000km service and I was disturbed to see that the service includes a valve clearance adjustment and the removal and cleaning of the inlet manifold.