Remove the belt, start it, and find out. Or you could just pull the intake on a hunch...
When do they "allllll" start to leak? I'm a little concerned since my truck is only 20 years old and barely has 196,000 miles. If it's going to start leaking like "allllll" off them do before a half-million miles, I should start planning.this is a huge problem we all have yet to solve because they nearly allllll leak right there too.