HELP. engine rattle :(

[ferris360]

right then baked to f**k today put new rocker cover on car and was pissing out oil turns out rocker cover was wrong but engine running and sounding mint. sorted that then had to studs knacker up lucky just got anther engine last night so robbed them refitted the rocker cover put every thing back to gether fired it up and its rattling from the back of the engine when its rev'ed it speeds up and its louder. pritty sure nothing has fallen in even tryed starting engine with king lead off so i would not start and turned engine over and no rattle. we even tryed it with no rocker cover to prove that and still rattled when fired up.


at a loss what to do dont really wanna have to take head off unless theres no other way as want to go to all types in it and wont have much time to work on it in the week