diagnose this noise

[richie]

there is hundreds videos on you tube wit the same noise im goin through forums now to check it out. very one saying its timing chain rattle but no on says whats causing it or how to fix it. some engines locked up in 6 months others are still running with it so i dunno

[way2fastforu]

msg the nissan doctor an ask him to listen to the vid an see if anyone gona no its him

[SR20Eric]

hate to be the bearer of bad news but the big ends are gone mate..

[gem-s13]

do not start that engine again ur big ends are fucked lad u have probibly fucked ur crank to if uv been reving the shit out of it listining to it, what were u doing when u first heard the noise cornering hard, doing rings, slidin???