I have a 02 wrx with 138xxx on it. Just picked it up and did some maintinence on it (new plugs, oil change, and added some gear lube to front diff). While changing the plugs I dropped a bolt and it ended up below my tmic. I tried for ever to get it and then decided to take the intercooler off to get it and check everything out. I ended up getting the bolt half way through taking the intercooler off so I put the bolts back in and tightened everything down including the stock bov. Ever since then I have had a weird noise coming from that area that makes a high pitches whining noise when it first starts up. When I drive it makes the noise from 2000 rpms and dies off at about 3200 rpm until the car is warmed up then it goes away. New to boxers so anything will help. This is my DD so I don't want to drive if it's something major. Thanks!