LAst couple of months Ive noticed that my mazda3I was making weird squeeking noises from the engine. Only wen I start it up cold does it make this noise, also wen I run it for more than 6hrs. Took it to a local mazda dealer couple days ago and they had no idea becasue (of course) it dident make the noise wen they checked it out. I dont know to me I thought it could be a belt becasue it now just hit 40,000 miles. Any ideas would be great. Thanks.