I did my apprenticeship in an engine shop working on diesel and gas pots as we called them. When the foreman caught me assuming something he taught me his phrase 'if you found a french safe in an apple box would you eat it' from then on I never assumed anything even if it was new and out of the box. If the foreman did catch me assuming something he would say 'ah you like the taste of rubber'. In one incident a brand new water pump was installed, the engine put on the dyno and overheated. Seems that at the factory someone forgot to install the impeller. Rubber is not my favourite flavour.
