Pull oil galley plugs, Y/N |
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Pull oil galley plugs, Y/N |
930cabman |
Jun 26 2021, 05:41 PM
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#1
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Advanced Member Group: Members Posts: 3,064 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
We are doing a complete rebuild of 2.0/4 motor, pistons were stuck in the cylinders. I have stripped it down to the bare case and curious as to how many "engine rebuilders" open up all the oil passage ways and do a good scrub of the galleys. As far as I can tell there was no catastrophic failure, bearing failure, broken rod, etc.
As always, thank you |
Mark Henry |
Jun 26 2021, 06:08 PM
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#2
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
I always do the main 5 with 3/8" NPT plugs, not so much for the nasty, but because these are the ones that can fail.
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Superhawk996 |
Jun 26 2021, 06:35 PM
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#3
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914 Guru Group: Members Posts: 5,824 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
Pull em’.
There is no telling what is piled up in there just waiting for some old piece of swarf to come loose into your freshly built motor. Same reason not to reuse an old oil cooler! No telling what’s in there. Cleaning the galleys is cheap insurance unless you know the history of the motor which is not your situation. |
930cabman |
Jun 27 2021, 05:45 AM
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#4
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Advanced Member Group: Members Posts: 3,064 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
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Mark Henry |
Jun 27 2021, 09:44 AM
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#5
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
I always do the main 5 with 3/8" NPT plugs, ot so much for the nasty, but because these are the ones that can fail. Stainless steel hex plugs with teflon tape? No, I use steel plugs with the micro-encapsulated sealant or red loctite. You can also use liquid teflon pipe dope, but never the tape. |
930cabman |
Jun 27 2021, 11:37 AM
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#6
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Advanced Member Group: Members Posts: 3,064 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
I always do the main 5 with 3/8" NPT plugs, ot so much for the nasty, but because these are the ones that can fail. Stainless steel hex plugs with teflon tape? No, I use steel plugs with the micro-encapsulated sealant or red loctite. You can also use liquid teflon pipe dope, but never the tape. Thanks Mark, why no 316 stainless? |
Mark Henry |
Jun 27 2021, 12:33 PM
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#7
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
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Shivers |
Jun 27 2021, 01:30 PM
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#8
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Senior Member Group: Members Posts: 2,378 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
Thanks Mark, why no 316 stainless? I guess you could but why? Stainless isn't the best in aluminum. I won't use stainless studs in the heads. The only thing I do in stainless is cheese head screws, valves and exhaust systems. "When aluminum and stainless steel are used in an assembly together, the electrons from the aluminum will begin to transfer into the stainless steel. This results in the aluminum weakening. This weakened aluminum causes it to deteriorate at a much faster rate." https://www.albanycountyfasteners.com/blog/...l-and-aluminum/ |
930cabman |
Jun 27 2021, 02:28 PM
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#9
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Advanced Member Group: Members Posts: 3,064 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
Thanks Mark, why no 316 stainless? I guess you could but why? Stainless isn't the best in aluminum. I won't use stainless studs in the heads. The only thing I do in stainless is cheese head screws, valves and exhaust systems. "When aluminum and stainless steel are used in an assembly together, the electrons from the aluminum will begin to transfer into the stainless steel. This results in the aluminum weakening. This weakened aluminum causes it to deteriorate at a much faster rate." https://www.albanycountyfasteners.com/blog/...l-and-aluminum/ Thanks guys, I have used aluminum and stainless for years and never knew of galvanic between the two. Steel it is Gun cleaning brushes for the oil galleys? |
Dave_Darling |
Jun 28 2021, 12:32 AM
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#10
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
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davep |
Jun 28 2021, 12:11 PM
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#11
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914 Historian Group: Benefactors Posts: 5,143 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada |
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jd74914 |
Jun 28 2021, 01:32 PM
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#12
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Its alive Group: Members Posts: 4,780 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
Thanks guys, I have used aluminum and stainless for years and never knew of galvanic between the two. There is always galvanic action between two dissimilar metals. The degree of action (voltage) depends on the actual metals. 18-8 to Al/Mg alloys is pretty bad...much worse than mild steel (something like 8x higher galvanic potential difference IIRC). |
930cabman |
Jun 28 2021, 01:53 PM
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#13
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Advanced Member Group: Members Posts: 3,064 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
Thanks guys, I have used aluminum and stainless for years and never knew of galvanic between the two. There is always galvanic action between two dissimilar metals. The degree of action (voltage) depends on the actual metals. 18-8 to Al/Mg alloys is pretty bad...much worse than mild steel (something like 8x higher galvanic potential difference IIRC). Possible aluminum plugs are the way to go? If not, why? No expansion/contraction issues, no galvanic activity, .... I am not sure who has them, but I'm sure they are available |
Shivers |
Jun 28 2021, 02:31 PM
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#14
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Senior Member Group: Members Posts: 2,378 Joined: 19-October 20 From: La Quinta, CA Member No.: 24,781 Region Association: Southern California |
Thanks guys, I have used aluminum and stainless for years and never knew of galvanic between the two. There is always galvanic action between two dissimilar metals. The degree of action (voltage) depends on the actual metals. 18-8 to Al/Mg alloys is pretty bad...much worse than mild steel (something like 8x higher galvanic potential difference IIRC). Possible aluminum plugs are the way to go? If not, why? No expansion/contraction issues, no galvanic activity, .... I am not sure who has them, but I'm sure they are available Since it is not s shear situation, that would be the best. No reaction between like materials. Heating and cooling should be the same |
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