Hi im new to this site so hope ive posted in the right section, anyways my aunts got a 1997 mk3 golf convertible 1.8 8v but her engines seized, i tried draining the oil but nothing came really came out so took the sump off and the oil was really thick like tar so scraped it out put some fresh oil in and it started eventually but the bottom ends knocking really bad so going to change the engine, ive been offered a 2.0 8v engine out a 1997 mk3 for free so just wondering if it will just fit straight in and work or if anything else will need changing, thanks.