Barry S. wrote :
>Actually, the term 'freeze plug' is misnomer. While they may pop out when
>or if the block water freezes, (although usually the block just cracks)
>that's not what they are there for. They are more accurately termed core
>plugs and are use when the block is cast to hold and allow for the removal
>of the inner sand core during and after the casting operation. They are
>then plugged with 'core plugs' to seal up the block. Some are also there
>to provide access for machining certain areas like the cam bearings.
>Just thought you might like to know :-)
^^^^^^^^^^^^^^^^^^^^^^
>
>Barry Schwartz in San Diego, CA
>
>Bschwartz@encad.com
>72-V6/5sp Spitfire ( daily driver )
>70 GT6+ ( when I don't drive the Spitfire )
>70 (sorta) Spitfire ( project )
>73 Ford Courier ( parts hauler )
Thanks for setting the record straight. If they were truly there for
freeze-crack protection, they would have to considered failures at that,
in most cases.
If the core plugs are rusting through, it's probably time for a complete
reverse-flush of the cooling system , and it is likely that the old
coolant had gone acid.
BUT keep in mind that the coolant leak in the original post had not
yet been located, and it's possible that the heater hose at the rear
of the head / manifold area or the water return pipe could have leaks
that are dripping from the same general area...and would not necessitate
pulling the engine to get at !!
Good luck,
Tom Tweed
SW Ohio
Inquiring minds ALWAYS wanna know ! 8-)
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