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Sid · 08-05-2019, 02:10 PM

1/8" holes are probably okay. I usually do about 1/2 that size. To help eliminate any air pockets. Generally about 1/16". The larger holes will probably just take a little longer to get to the 180 deg.

08-05-2019, 02:10 PM	#2
Sid Senior Member Join Date: May 2010 Location: Rathdrum Idaho Posts: 737	Re: Problem with My Aluminum Radiator 1/8" holes are probably okay. I usually do about 1/2 that size. To help eliminate any air pockets. Generally about 1/16". The larger holes will probably just take a little longer to get to the 180 deg.