While driving last year the large molded hose loosened at the air flow meter, rendering me temporarily unable to get out of my own way. One minute later I tightened it up and off we went. Spent last year checking and rechecking to make sure it did not happen again. So today, after what seems like two months of rain we took our 87 Graduate (Red) out for a ride and I forgot to check. This time it loosened at the plastic manifold on the intake side of the engine. Naturally I had taken the tools out of the trunk so I tightened it with my finger nail and a piece of plastic and drove home very gingerly. Got home and tightened it down, but I am worried about that plastic manifold on the intake side. Do I have to worry about damaging it when tightening?