TwinTurbo.NET: Nissan 300ZX forum - I drill them, tap them and screw a bolt in to slide-hammer
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Subject I drill them, tap them and screw a bolt in to slide-hammer
     
Posted by Doug71zt(CAN) on August 07, 2020 at 9:12 AM
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In Reply To Re: How to change block oil galley & brass plugs? posted by DanielThomas on August 06, 2020 at 10:40 AM
     
Message them out.
Don't pull the brass ones, there is no point. Just the supply gallery plugs to rifle-brush the passages after the machine work.
For the coolant gallery, I use an extended nose die grinder and 6" carbide bits, that way you can reach the center of the gallery from the front and back. You should be able to get a roughly consistent triangle all the way to the back of the gallery.

     
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