TwinTurbo.NET: Nissan 300ZX forum - It's supposed to be 1/8" BSPT
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Subject It's supposed to be 1/8" BSPT
     
Posted by LitlElvis on October 28, 2022 at 12:59 PM
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In Reply To Best way to fix this block oil line thead? Broke off posted by nonstopna on October 27, 2022 at 11:37 AM
     
Message If it was previously Helicoiled, then that sucks and if it was TimeSerted, then that really sucks. Neither are an optimum fix for tapered pipe threads IMO.

I would grind the boss down about 1/8" so that the damaged material on top is removed. Then up-size the hole to 1/4" NPT and install a brass pipe plug with female hex drive. Then drill and tap the newly installed 1/4" plug to 1/8" BSPT to finish the repair.

     
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