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E9 head bolt threads in block


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Hi Guys,

Have two damaged head bolt threads in an E9 block. Just wondering if anyone has ever had to carry out a repair like this. Had our local engineer over yester day and tossing up wether to tap out threads to 11/16'' with the same pitch as the standard 5/8'' threads, or, is it possible to drill deeper into the block and extend the original size threads.



Mawscode Truck Repairs

Caboolture, Queensland


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We had thought of that too Doug but was a bit concerned about the block thickness between the edge of the hole and the edge of the liner flange. But after talking to a few different engine guys we think we should be ok. Thanks for your input mate.

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