Let's see if this can help you:
1st to see what is in the guts of your engine, it is best to go to scrapping and ask for what you are looking for. Not only will you see it but you will touch it and you will stain oil hahaha but it's the best.
2nd In the Google you write the type of motor of your car and you give it images, if you do not know the engine (eg aaj, AAD) looks for what it puts in the cardboard of the technical inspection card in the Type/ Cylindrada/ Kw motor section/ kW fiscal ... below the box superior to the right.
3rd Be careful when I put hand to the engine, that if you don't know you can ling it, so ask and make sure you are going to do.
I hope I have helped you.
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