Just when you get the oil leaks under control (my engine bay looks pristine finally), I fired up the old girl to hear the slightest of rattle noise from the engine bay. Kinda sounds like marbles in a can but at a low pitch, also goes with the rpm when you rev the engine. The car is at 104,000km rounded up and has basically been stock besides the PPK around 60,000km and MHD stage 1 91oct map now recently. It still has stock serp belt and the pulleys. My guess is one of the pulleys might be on it's way out but being in Canada, we don't get the nice ECS kit otherwise it will be a fortune shipping it here. Just wondering if anyone has any other suggestions. I'm going to replace the belt and pulleys shortly just to eliminate that as the noise and it should be done anyways. I hope it won't require an engine rebuild. N55 platform just as a FYI.