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Discussion Starter · #1 ·
There's a 1/2" NPT hole in the top center of every water pump. I've never seen one connected to anything, they're always plugged. What is that hole for?
 

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DC PIT CREW BOSS
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Most SBC water pumps are geneic in that they will fit anthing, with the only distinction being either a short (older) or long ( newer). A lot of the older cars used it for a heater hose connection.
 

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Discussion Starter · #3 ·
Torch Red 2K said:
A lot of the older cars used it for a heater hose connection.
Makes sense, thanks.:cheers:
 
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