'92 4.3LX Block Drain

Marada92

Petty Officer 1st Class
Joined
Jan 14, 2011
Messages
223
Ok guys so I'm needing to find the size of the drain hole in the block to clean it out with a tap. I know these come with an adapter with either the blue plastic plugs or a brass plug. I have the insert with the brass plug on one side, and upon pulling the engine to begin my restoration I come across this handy work. The previous owner was a moron. My best guess is the broke the plug... Tried to go at it with an ease out and then said screw it and piled it full of silicone. I tackled it and realized they had it cleaned out they just needed to knock the leftover metal off. Moving along... I got what i believe all the silicone out and am left with the original threads just rusted up so I'm going to try and clean them up and get a new plug. So any help on the size would be greatly appreciated... I have found where some are saying 9/16 which looks about right but I don't know the thread size.
 

Marada92

Petty Officer 1st Class
Joined
Jan 14, 2011
Messages
223
Thanks Bondo! I was getting confused on the pipe thread. I had found that answer before but I thought it was the size for the plastic plug. Never realized pipe thread was listed differently. Learn something new everyday. Thanks again!
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,079
Thanks Bondo! I was getting confused on the pipe thread. I had found that answer before but I thought it was the size for the plastic plug. Never realized pipe thread was listed differently. Learn something new everyday. Thanks again!

Ayuh,... Don't run it in too far,.... It's tapered, 'n the hole gets Bigger, the deeper ya go,....
'n,... it ain't that far to the back wall of the jacket,..... it's Oil beyond the wall,.....
 
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