The light tapping noise on starting the engine been going on for a while, but
this time it just keep tapping very loud, and no sign of quiting. I have try
the MMO trick, did not work. Because of the different tapping pattern this
time, I am hesitate to drive it on the highway for 10 - 20 minutes, afraid
that too much heat might burn the head gasket. I have therefore decide to fix
the source by replacing the possible collapsed lifter. It doesn't seems to be
too difficult to do. I have the Bentley manual to refer to and have obtained
lots of information from the Archieve. However, there are several simple
things just cannot be found in the book.

1. When I turn the cranshaft to set cylinders 1, 2,3, and 4 to TDC, how do I
know which valves/lifters belong to which cylinders?
2. My vanagon has auto trans, do I turn the center large pulley bolt to
rotate the cranshaft with the transmission in neutral? This bolt is really
big.
3. The manual says rotate cranshaft 180 degree, and adjust the next cylinder.
Does it mean clockwise direction? Can I judge my watching the distributor
rotor?

Any suggestion will be really appreciated.

Albert