My Aurion is a 2010 ZR6, I've got an intermittent rattling noise coming from the belt side of the motor. I've replaced all three pullies, the A/C compressor and new belt installed. I've checked the water pump, all seems fine there, I'd replace that too but it appears to be a "challenge" to remove and replace, we don't think it's coming from there. The alternator has 100K on it, replaced three years ago. Like I say, it's intermittent, but when it happens it sounds BAD. When I rev the motor there's a "whoosh" noise and it goes away. It's really hard to pinpoint a scenario that makes it happen. Motor itself is in good shape, no sludge, plenty of power. 300K freeway kms. Any ideas?
