sounds more than just a vacuum leak. there's a rattling. I bought a new timing chain tensioner and it helped but it still rattles. Does anyone have a link or vid for checking the oil pump? When i put the dip stick in i got no oil level until it reached about 9 quarts so i'm thinking no oil pressure? I opened the lower oil pan and founds tons of crap so i cleaned it out but i can't find the oil pump and the gear i'm suppose to check for the common "loose nuts". Any help is appreciated on that process /link. Thanks.

-Tony