i want to check my engine, as its an ideal time to do any work really as there are no more shows etc, I have some jobs that I want to do, however I would like in general to check the overall state or health of my engine are there any tests I can do or carry out? to see if its tired etc it doesnt smoke except for a small bit of black smoke on start up, and doesnt seem to smoke at all after driving it or lifting off etc if that helps