Start with removing the intake manifold. If it still not found you will have to drop the oil pan. If it made it's way to the bottom of the oil pan it would be harmless, but you will not know.
It would likely fall all the way to the bottom of the oil pan and remain there. It's too big to fit through the oil pump pickup, so there is no way it could cause a problem.
When a washer is heated, the hole will expand in size due to thermal expansion. This means that the diameter of the hole will increase as the washer absorbs heat. Cooling the washer will cause the hole to contract back to its original size.
There is a tapped hole next to the distributor hole in the intake manifold.
The dristibutor
Replace to inlet washer this normally happens when the washer develops a hole
The Donut Hole was created in 1968.
The camshaft sensor is located in the distributor. I believe you have to replace the hole distributor.
As you face the engine the first spark plug wire on your left is connected tot he first cylinder. Trace it back to the distributor and you will have the proper hole. If you have no wires connected then it is usually positioned at about 1 oclock as you face the distributor. (assuming the distributor is properly positioned)
Maybe the coil pack don't know what hole you are talking about
To calculate the bearing stress between the timber and the steel washer, you need to know the applied force or load. Once you have the force, divide it by the contact area between the timber and washer, which is the area around the hole. The contact area can be calculated as the outer diameter of the washer minus the diameter of the hole, multiplied by the thickness of the washer. Finally, divide the force by the contact area to find the bearing stress.
It's a WASHER, possibly a torque washer.
There is a tapped hole on the rear rail near the distributor hole.