Is it a common problem to have the coolant elbow o-ring fail but the intake gaskets still be good? I pressured the coolant system up and found one of the elbows was not holding pressure. I have no coolant in my exhaust or oil. It seems like i need to replace the coolant elbows, but it seems too simple. I have an 05 which from my reading is hit or miss on getting the plastic intake gaskets.