I'm starting to suspect my car may have had an engine change, can anyone tell me where I can find the engine number on a AUQ engine, its the correct engine fitted as it has the right code stamped on it, but took the cover off today and noticed it has 'Leon' written in marker pen on the cam cover.

Thanks in advance.

Maybe the cam cover has been changed with one from the scrapyard.

Someone has fitted another CAM cover, or possibly a whole engine from another car at some point in the past. The early LEON Cupra, Audi TT 180, and Octavia vRS all use the same engine.

I'll check my Haynes tonight and get back to you.

It appaears to be a replaced engine, I've been and had words with the garage I bought it from and they are going to finally sort out all the issues with the car, and give me a car to use while they fix mine.