How to make sure engine is original?

[Riboflav1n]

I am in the process of buying a 1992 Civic HB VX and want to make sure that the engine in the car is original, how can I confirm this by inspection? Thanks.

 

[crash!]

Matching VINs

 

[codeman76]

Engine code will be stamped d15z1 and the ecu and head code is p07.

 

[Riboflav1n]

Awesome, thanks. Everything checked out.

 

[emerican]

glad to hear it all checked out.