Looking to tap egr

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Mar 21, 2019
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#1
Im looking to tap the egr hole in the back of the head, I've seen people do this instead of using a block off plate. Just wondering what size thread /pitch do you use and what sealant for the threads?

Thanks!

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Enraged

A HG job took HOW long??
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#2
My machine shop just put a press in plug in mine, no issues with it. If you are going to thread something in, I'd suggest an aluminum NPT plug, that way you don't have to worry about different rates of expansion between the plug and the head.