3208 block heater

[webdarn]

Last week we made a 600 mile round trip in the Bird and had no
problems except paying for the fuel! Yesterday, I noticed a hissing
sound and found my wife had hit the block heater switch with her foot
and the thing had been on for six days. I noticed an antifreeze drip
from the motor. As soon as I turned off the heater, the drip stopped,
but I had lost a gallon or so of coolant. I can't see where the
heater is mounted without removing the big tow hook mount.

The motor was really warm, over 185 degrees. Does this thing have a
relief valve or anything? Is this a leak that will reappear while
driving?

Andy Clayton
'82 35 FC (3208 NA)