TwinTurbo.NET: Nissan 300ZX forum - Sometimes a hole like that will be drilled and tapped thru
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Subject Sometimes a hole like that will be drilled and tapped thru
     
Posted by Gordo 93TT Daytona on July 28, 2011 at 7:37 PM
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In Reply To I don't completely understand your terms, posted by RoidRage76 on July 28, 2011 at 04:19 PM
     
Message the engine block material and into a water cooling jacket. I assume that the entire hole for this bolt is encased by the aluminum of the block and that it does NOT penetrate into the engine's cooling system.

In a 'wet' bolt hole, the threads in the hole will seal in the coolant. My concern, if it were a hole tapped into the coolant jacket, is that a helicoil may not seal in the coolant and then there would be a leak there.

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