can't figure out that noise.

[silpena]

Ok i can't figure out this noise coming from under my intake manifold near the oil filter and alternator. It started awhile back and only does it on cold engine temp and start ups and goes away gradually after driving it. It loud and stupid. And its not a knock, rattling if ur thinking that. I took off the top guide(it broke and was dangling there) so its something else. Its driving me crazy! grrrr anyone have suggestions?drsciption93 240sx dohc(if u want to know)noise- buzzing kinda noiselocation- under intake manifold and oil filterany help or experience will help.

[bakero]

is it something in the pulley system?

[Nismofreek823]

does it change with rpm?

[silpena]

no its gets louder during rpms. Its not anywhere near the pulleys. Its under the middle to back of intake manifold(upper) near the oil filter i thought maybe its gotta do with my filter but idk. It goes away once i drive like 1 mile after warm up. I wish i had a video camera maybe i can barrow one. IT started after an oil change. i was using mobil 5000 idk if that helps. My guess is using fram filters had to do something with it...... yes i was using fram but now i use wix. I don't think anyone has experience this...