When I did the engine conversion the mechanic changed the old cambelt with a new one for safety.
He order one cambelt for c20xe engine but was different from mine engine. Maybe because mine is from the latest models (DIS).
Then he put a cambelt from a diesiel vauxhall engine and he told me that it fits perfectly. I think that the cambelt was from the cavalier 1.7 diesel or turbo diesel engine, or from isuzu diesel engine that many opel astra mk3 taxi use here in Athens.
Can it possible a diesel vauxhall engine to have the same cambelt with my c20xe engine?