Fittings such as these, for connecting a compressed air line to the spark plug hole for valve support, are available at most auto parts stores. Occasionally it is necessary or desirable to inspect or ...

If the cylinder heads are on the engine, you will need to add air pressure to the cylinder to hold the valves in place. Our example is the Craftsman 47089 compression test kit using the 14mm long ...

I have a 2014 Mercedes-Benz A180 and have lodged an insurance claim with NRMA as the engine in my car has a broken valve spring. The only way the Mercedes-Benz Service Centre discovered this was to ...

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