For xmas I received a coolant leak at the head on the left side of my
'86  2.1 Westie.  I took the lower tin that hides the push rod tubes
down to take a close look for the source of the leak. The leak appears
almost immediately {hot or cold}when running the engine at  the gasket
in the center of the engine where the head joins the engine  However, I
think but unsure that the leak is migrating either from 1} further back
 along the gasket at  the site of the fourth piston or 2} an expansion
plug ? (wishful thinking} between the two rearmost  push rod tubes,again
at the fourth piston.
Any information on how to resolve this puzzle and solutions to repairing
the leak would be gratefully appreciated.
Thanking you in advance.
Alex