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EGR injection holes on the back of heads

165 Views 0 Replies 1 Participant Last post by  jyro
I figured out what thread they are from the factory
They are pre-threaded for 1/2" helicoil, my helicoil tap fit the threads great, I put helicoils in both and tomorrow I'll get a couple of short 1/2"x13 set screws and plug them off with locktite
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