Quote:
Originally Posted by Bjjfitr
There's one more plug behind the turbo on the block in place of a freeze plug what does that do?
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That one sounds like an engine block heater. Maybe a rarely seen device in AZ! Your engine might have spent some time living somewhere further north in its earlier days if it has this. The engines start easily in all but the most frigid weather without plugging in, assuming everything else is healthy with the motor and fuel/glow systems, so I imagine block heaters are not often installed down in the SW states.
You don't need to connect anything to it now, but you may as well keep it in the engine if you already have it, since there is always a chance it could be useful some day. E.g. starting on a very cold morning at high altitude if you have a dead glow plug or two, it might make the difference to get it going. I guess Flagstaff does get some cold mountain weather sometimes, no?
While you have easy access and no coolant in the motor, you may want to R&R its O-ring since they can get brittle and seep after long time. Otherwise there is not much to worry about with them.
If you ever do want to use it, it should accept a generic block heater cord available at any auto parts store. Phillips/Temro brand or similar.