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Originally Posted by JCL
Could be (1) or (2), but a porous block casting, while possible, doesn't seem likely to me. I have seen it, but it isn't common. Whatever it is, I would give them a chance to fix it. That is what your warranty is for.
I wouldn't call (1) a freeze plug, which is generally a plug in the casting that has antifreeze behind it, not oil. A core plug is part of the casting process, and in theory when the coolant freezes it can push out the core plug, but coolant plugs aren't the same as oil galley plugs.
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You are absolutely right. I should've known that. One of the downsides of only having assembly production experience and not casting/forging.
Aren't almost all the core plugs, freeze plugs though?
EDIT- *sigh* answer found on wiki: "Most of the plugs to be found on an engine are actually to plug the holes where sand cores have been held. Freeze plug is a misnomer for core plug or expansion plug.."
http://en.wikipedia.org/wiki/Freeze_plug