I discovered a weeping oil leak on the air intake manifold on my 06 Scion tc. I know the 2az-fe engine has the head bolt issue, but that doesn't look like the issue here. It's only one bolt (furthest right side) that's wet with oil towards the throttle body (driver's side of the car).. I didn't try snugging that bolt down because I could see a bit of the gasket sticking out.. which I don't think is normal at all.. Is it a common issue or known issue with the intake manifold gasket going bad? Thought I'd ask.. yes I know I'll have to get in there and take things apart, but wanted to ask..