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#1
05-21-2015, 09:06 AM
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Re: Block Coolant Leak Repair???
The best answer would be to pull the head, IMO. If this isn't an option then I too would use the GM tablets. Also have heard that Irontite works very well, but have no personal experience with it.
Good luck with whatever method you choose.
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Remember the days of carburetors,chrome,and leaded gasoline? 1969 Nova SS L78 4-speed 
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#2
05-21-2015, 02:11 PM
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Re: Block Coolant Leak Repair???
Did you tap the threads out at all? Pipe thread is tapered.
Jason
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#3
05-21-2015, 06:16 PM
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Re: Block Coolant Leak Repair???
I am thinking I will get some of the tablets and that will get through me through the summer. The car won't be driven much, but then next winter when I can take my time, I will carefully pull the head and have a machine shop weld and retap the hole. Thanks
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Paul '62 Bel Air 409/409 '63 Impala SS 409/340 convertible '68 L72 Biscayne '69 L78 Nova '17 Denali 3500HD
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