LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

What size is the plug above the oil cooler?

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Old Mar 30, 2003 | 03:48 PM
  #1  
Bryan 94 Z28's Avatar
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What size is the plug above the oil cooler?

It looks like a 1/4" pipe plug should fit in there, but I can't get the damn thing to fit!

I even just went out and bought a 1/4" NPT tap to try and clean up the threads a bit (the block was painted), but that thing won't fit either!

What size could it be?
Old Mar 30, 2003 | 04:58 PM
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Bryan 94 Z28's Avatar
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Old Mar 30, 2003 | 05:10 PM
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Should be a 1/4-18 pipe thread as far as I can tell.
Old Mar 30, 2003 | 11:15 PM
  #4  
Bryan 94 Z28's Avatar
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Well fruck......that's the same size plug and tap I'm trying to use in it and they aren't f'ing working.

I wish the damn machine shop hadn't taken these plugs out.....or that they would have at least put them back in!!
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