Dropped an extension into the thermostat housing... :(... how do I get this out?

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Nov 22, 2021
Cleveland, OH
I was changing the thermostat on my 88 FJ62 with a 3fe. While I was drilling out the upper housing bolts that snapped,
I managed to drop a 2" 3/8 extension down in the thermostat housing.
Any advice on getting this out? I've tried fishing this out with a magnet and so far no luck.

How screwed am I?
I found a hand tap lodged inside the water jacket of my cylinder head. I have no idea how it got there. It wasn’t mine. Someone at some time (at the factory in Japan) dropped it in there & couldn’t fish it out - so they left it.

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