Thread: 55.2-59 Oil Pressure line hole
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Old 11-02-2023, 10:20 AM   #4
dsraven
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Join Date: Nov 2010
Location: calgary alberta
Posts: 7,839
Re: Oil Pressure line hole

threaded holes in the engine block will simply be a national pipe thread like nvrdone says. you could just pick up a few different sizes and try them or you could take the old line fitting with you and match up a fitting. should be 1/8 npt I think. I gave my old gauge set away to a fella who needed one or I would check the line fitting for you.
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