 Removing oil galley plugs, drilling and tapping |
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| 930cabman |
 Dec 9 2023, 05:55 PM
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#1
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Advanced Member  Group: Members Posts: 4,074 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States 
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I have looked and looked and have not found any information.
Please enlighten us with this process. I have a pile of 3/8" aluminum pipe thread plugs TIA |
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| Geezer914 |
Dec 9 2023, 06:19 PM
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#2
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Geezer914 Group: Members Posts: 1,923 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States
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Are you rebuilding the engine or just replacing the plugs? If rebuilding, just remove the original plug and tap the holes. If just replacing the plugs grease the pipe tap so the shavings stick to the tap. I used short pipe plugs so they sat flush to the block. I used ARP thread sealer on the plugs.
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| 930cabman |
Dec 10 2023, 07:14 AM
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#3
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Advanced Member Group: Members Posts: 4,074 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
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QUOTE(Geezer914 @ Dec 9 2023, 07:19 PM)  Are you rebuilding the engine or just replacing the plugs? If rebuilding, just remove the original plug and tap the holes. If just replacing the plugs grease the pipe tap so the shavings stick to the tap. I used short pipe plugs so they sat flush to the block. I used ARP thread sealer on the plugs. Rebuilding the engine. Are the factory plugs "easily" removeable with a slide hammer? Also, will the holes need to be opened up to a 3/8" plug drill with a flat bottom drill? |
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| Superhawk996 |
Dec 10 2023, 08:18 AM
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#4
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914 Guru Group: Members Posts: 7,044 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(930cabman @ Dec 10 2023, 09:14 AM) QUOTE(Geezer914 @ Dec 9 2023, 07:19 PM) Are you rebuilding the engine or just replacing the plugs? If rebuilding, just remove the original plug and tap the holes. If just replacing the plugs grease the pipe tap so the shavings stick to the tap. I used short pipe plugs so they sat flush to the block. I used ARP thread sealer on the plugs. Rebuilding the engine. Are the factory plugs "easily" removeable with a slide hammer? Also, will the holes need to be opened up to a 3/8" plug drill with a flat bottom drill? Yes - slide hammer and screw will pull old plugs Yes - holes will need to be drilled for appropriate size plugs. The other option I’d like to do someday is to simply machine up new plugs like OEM and shrink fit them. I honestly could have machined plugs in the same or less time than it took to prep all the holes for NPT plugs. |
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| 930cabman |
Dec 10 2023, 10:21 AM
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#5
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Advanced Member Group: Members Posts: 4,074 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
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QUOTE(Superhawk996 @ Dec 10 2023, 09:18 AM) QUOTE(930cabman @ Dec 10 2023, 09:14 AM) QUOTE(Geezer914 @ Dec 9 2023, 07:19 PM) Are you rebuilding the engine or just replacing the plugs? If rebuilding, just remove the original plug and tap the holes. If just replacing the plugs grease the pipe tap so the shavings stick to the tap. I used short pipe plugs so they sat flush to the block. I used ARP thread sealer on the plugs. Rebuilding the engine. Are the factory plugs "easily" removeable with a slide hammer? Also, will the holes need to be opened up to a 3/8" plug drill with a flat bottom drill? Yes - slide hammer and screw will pull old plugs Yes - holes will need to be drilled for appropriate size plugs. The other option I’d like to do someday is to simply machine up new plugs like OEM and shrink fit them. I honestly could have machined plugs in the same or less time than it took to prep all the holes for NPT plugs. Great idea, I can have my friendly machinist make them up and shrink fit them, will they need to be hollow backed or can they be solid How does one "heat" the case, locally or in an oven to xxx degrees? |
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Posts in this topic
930cabman Removing oil galley plugs Dec 9 2023, 05:55 PM
Superhawk996 Now you did it by mentioning aluminum plugs which ... Dec 9 2023, 06:14 PM
bkrantz And make sure the openings (and plugs) are CLEAN b... Dec 9 2023, 10:35 PM MikeK It's been a while since I did this, but I reca... Dec 10 2023, 10:19 AM 930cabman Had a couple minutes and was able to pull 4 plugs ... Dec 10 2023, 02:14 PM
Superhawk996 If you do machined plugs like OEM there would be n... Dec 10 2023, 05:59 PM 930cabman
If you do machined plugs like OEM there would be ... Dec 11 2023, 06:01 AM |
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