Being Chinese the service schedule will be ridiculous and work out very expensive. Not going to say this is good advice but personally I only did 1st service on mine, others I've done myself and to hell with warranty, resell value will be poor anyway and what I've now saved on cost of keeping service schedule through an authorized dealer would cover the cost of any repair if something did go wrong. Yeah, remove sump plug, drain engine oil, remove engine from frame, install new engine, and refit sump plug and add oil.. just don't cross thread it else you'll need a new sump plug too.