leggy206

My 2002 GT has developed a noise from I think the passenger side. It's a vibrating noise from the engine, most noticeable around 1500 - 2000rpm when the accelerator is pressed. I'm only noticing it when I'm in drive and don't hear it when I'm in park/neutral. I don't think it's related to drivetrain or anything like that as I'm only hearing it when I accelerate. I have an odd feeling it may be the primary turbo as i dont think they engage until 1500rpm and when im in drive but I could be wrong. I've got no check engine light or noticeable drops in power. I've had a look around that area (and under the intercooler) and it appears like there has definitely been a leak in there at some point and likely recently. I've also noticed my coolant levels in reservoir have dropped 2x in the last few weeks to below minimum. I'm not noticing any in the oil, puddles under the car or white smoke. Maybe that could be related the leak near intercooler? Any suggestions as to what to look for?