[Vwdiesel] block heater in freeze plug

[James Hansen]

  IIRC, you can run a pipe into the drain plug on the bottom of the cylinder
head with an elbow and a hose barb on it pointing forward, then take a pipe
thread plug out of the block of the starting engine to accept another hose
barb, 3/8" or 1/2" NPT IIRC.  Use a circulating style heater- one with an
element in a can that has a hose fitting on the bottom, and one on the top,
warm coolant leaves via the top one etc... Nice thing is the starting engine
gets the warmest coolant, and if the starting engine runs, the rest will, as
they share coolant, and was designed to warm the incoming air to the big
engine, and preheat the coolant. Plug in time is around an hour to start
with this setup.
   You should also use a magnetic oil heater, as near to the oil pump pickup
as possible.  In 2 cyl JD's the oil pump can VERY readily get any speck of
condensation moisture that is around, then the square oil pump drive coupler
snaps off with obvious results of no oil pressure.  You want the oil pump to
be above freezing point of water. For sure, as cheap insurance if nothing
else.  JD 70 diesel... nice tractor.
-James
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