[Oldsmaniac]

There should be a cover there for those 2 bolts but if no cover is there the short bolts wont hurt anything.....there is no oil passage there. The only danger would be if the holes are tapped all the way thru (dont remember if they are) and the bolt hit the cam. The piece you are missing is a baffle. The valley tray is built into the metal intake gasket if you get the whole correct one and not the cheapo ones I have seen with no valley. Some aftermarket gaskets are paper and there is no tray as well....the cause of your noise is not because of the bolts.