If your junks knockin you should let it out and get some air.... just kidding, that sucks dude, more often than not its somethin easy to fix. I hope you get it fixed up. If not... drop a lightning motor in! ha ha.
well mine is not that bad...but when idling mine sounds like a mini powerstroke....not doing any damage so im not worried...but its not as bad as yours..let us know what you come up with