M103 2.6 or 3.0? How can I tell?

[kernasi]

Hi,
I got a "new" engine, a M103 and I wonder how I can identify if it's a 2.6l or 3l.
It runs perfectly so far, starts up like a new one but I want to know if it's a 2.6 or 3l one .

How can I tell just by looking at the engine? I had a M103 3l before.

Thanks,
Andreas.