Experienced 2.0 folks, what does this engine noise tell you?

[Charles.waite]

What is the inter-changability of 2.0 engines in the B7? Will a 2.0 from an 08 interchange into a 2006 chassis and ECU?

BWT, BPG, and BPY engines are all generally interchangeable. The main distinction is the Longitudinal Quattro Tiptronic crank is unique. Transverse and longitudinal manual/cvt engines are generally plug and play, you just need to swap accessories, thermostat, coolant flange, and probably the fuel pressure sensors (since those had vin splits and might not be the same on VWs).

Why would you swap the ECU? Then you have to deal with IMMO cloning and BPG (05-06) and BWT (07-08) has different ECUs.