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Author Topic: Thread pitch of oil galley plugs?  (Read 2027 times)
Jeff351w
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« on: May 29, 2016, 10:42:30 pm »

I have two oil galleys that still have press in plugs.  I'm going to tap them before I clean the block for assembly.  I'm assuming a 1/2" NPT tap is used, but what is the pitch 13 (coarse) or 20 (fine)?  I have the threaded plugs already, but I'm not sure of the pitch.

Thanks guys.
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« Reply #1 on: May 29, 2016, 10:49:03 pm »

1/4" NPT, not 1/2" UNC or UNF.
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Doing more with less, or something like that.
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liljoe07
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« Reply #2 on: May 29, 2016, 10:49:56 pm »

1/4-18
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Jeff351w
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« Reply #3 on: May 29, 2016, 11:03:22 pm »

Thanks guys.  I'll exchange the tap I bought for a 1/4-18 NPT tap.
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Quote from: mighty mouse

I often have tires with just too much tread or a fuel tank that is just too full. Accept no substitutes!
347HO
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« Reply #4 on: May 29, 2016, 11:24:54 pm »

A little bit at a time...  Don't go too deep... Keep checking your plug depth of this is your first time...
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Jeff351w
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« Reply #5 on: May 30, 2016, 02:20:01 pm »

Thanks for the tip.  Yeah, it's my first time for an oil plug.
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Quote from: mighty mouse

I often have tires with just too much tread or a fuel tank that is just too full. Accept no substitutes!
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