posted April 14, 2002 06:44 PM
I've always blocked off that hole with a small freeze plug(1/8 or 1/4?). Engine builder told me years ago it would reduce engine temp by 30 degrees because that hole shoots water on the #2 cylinder causing steam to build. Don't know the dynamics behind it, but it does work for me!!
posted April 15, 2002 01:37 PM
Forgot to mention I block off the hole in the pump, not the block.
posted April 15, 2002 01:57 PM
The aftermarket aluminum waterpump that I run, came from the factory with that hole plugged. So I say, yes that hole can safely be plugged.
[This message has been edited by istock59 (edited April 15, 2002).]