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offgrid 
Senior Member 
Joined: 23 Jul 2018 Online Status: Offline Posts: 5290 |
 Topic: Replacing Rusted anode rod?Posted: 23 May 2021 at 8:39am |
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Agree on the tank contamination. I said the Navy has probably done work in thus area, didn't look for it. But a quick Google search came up with this NACE publication. It I'm sure would have done useful guidance. Got $79?
NACE Pub |
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1994 Chinook Concourse
1995 RV6A Experimental Aircraft 2015 Rpod 179 - sold |
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lostagain
Senior Member
Joined: 06 Sep 2016 Location: Quaker Hill, CT Online Status: Offline Posts: 2595 |
Posted: 23 May 2021 at 7:59am |
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No matter what penetrating oil one uses, keep in mind that if you drink or wash dishes useing "tank water" you need to be careful not to get oil inside the tank and into the water. It's not likely that any of it is very good for you to ingest and it probably doesn't taste very good either. As for the brand, obviously, use what works for you or makes you happy.
As for the US Navy's testing of penetrating oil, please share with us their data or tell us what they use.
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Never leave footprints behind.
Fred & Maria Kearney Sonoma 167RB Our Pod 172 2019 Ford F-150 4x4 2.7 EcoBoost |
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jato
Senior Member
Joined: 23 Feb 2012 Location: Kewadin, MI Online Status: Offline Posts: 3255 |
Posted: 22 May 2021 at 10:56pm |
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PB Blaster works well for us, and yes PU it does have an unforgettable 'odor.'
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God's pod
'11 model 177 '17 Ford F-150 4WD 3.5 Ecoboost Jim and Diane by beautiful Torch Lake "...and you will know the Truth and the Truth will set you free." |
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offgrid
Senior Member
Joined: 23 Jul 2018 Online Status: Offline Posts: 5290 |
Posted: 22 May 2021 at 6:08pm |
Unless someone happened to have a bunch of equally exposed heavily corroded bolts laying around it would take too long to replicate a real world test. The Navy has probably done it, they do lots of long term corrosion testing in various climates. So I understand why he did it the way he did, he's trying to do an accelerated test. The problem is unless there is actual long term data to support the accelerated testing protocol it's just guesswork. In this case if we were trying to remove slightly corroded bolts with slightly more torque than was used to install them this would probably be a good test. But we're not, if we were doing that we would just take em off right off and not need penetrants, or heat, or impact drivers. I'll keep using my PB Blaster, it smells worse than the other ones so it has to be better, right? |
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1994 Chinook Concourse
1995 RV6A Experimental Aircraft 2015 Rpod 179 - sold |
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Tars Tarkas
Senior Member
Joined: 14 Jan 2013 Location: Near Nashville Online Status: Offline Posts: 1447 |
Posted: 22 May 2021 at 2:32pm |
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The video was kind of interesting, but even he admitted it wasn't very scientific. I came away with the impression that for practical purposes it doesn't matter all that much which product you use. Ever since I got a 60v impact wrench, I don't care too much about this kind of stuff anymore. Now, maybe on something relatively flimsy, like a water heater, I don['t know. I'm not sure, but it seems like careful use of an impact wrench shouldn't be more likely to cause damage than using a cheater bar. It is certainly much easier! Of course it's not a tool everyone has. TT
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2010 176
FJ Cruiser |
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lostagain
Senior Member
Joined: 06 Sep 2016 Location: Quaker Hill, CT Online Status: Offline Posts: 2595 |
Posted: 22 May 2021 at 10:20am |
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Why don't you do your own experiment with various penetrating oils and tell us which is best. Maybe you could make a video and post it to YouTube.
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Never leave footprints behind.
Fred & Maria Kearney Sonoma 167RB Our Pod 172 2019 Ford F-150 4x4 2.7 EcoBoost |
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offgrid
Senior Member
Joined: 23 Jul 2018 Online Status: Offline Posts: 5290 |
Posted: 22 May 2021 at 9:18am |
I don't buy this evaluation at all. First he torqued the nuts to 100 ftlbs. Then he corroded them with some type if oxidizing agent, after which the torque to remove them only went up a few 10s of ftlbs. Then some of the penetrants brought removal torque down below the original tightening torque. Obviously, the threads didn't get very much corrosion on them. We all know that removal torque on very rusted bolts is much much much higher than the tightening torque was. He also didn't leave the penetrants on long enough, my experience is that it significantly helps to allow them to remain on there for a day or two. I've used liquid wrench a lot in the past but PB blaster has if beat by far in my experience in the real world. WD40 is pretty much useless One result does agree with my experience. The flame wrench works great. And verbal threats are good too. 
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1994 Chinook Concourse
1995 RV6A Experimental Aircraft 2015 Rpod 179 - sold |
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offgrid
Senior Member
Joined: 23 Jul 2018 Online Status: Offline Posts: 5290 |
Posted: 22 May 2021 at 8:52am |
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If there is any magnesium left on the rod at all its still doing its job. Check it annually. Usually you'll see some rod at the base of the anode before the magnesium toward the tip is consumed. If it looks like that it's still working.
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1994 Chinook Concourse
1995 RV6A Experimental Aircraft 2015 Rpod 179 - sold |
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Ctvmotors
Newbie 
Joined: 29 Oct 2020 Location: Florida Online Status: Offline Posts: 4 |
Posted: 22 May 2021 at 7:55am |
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Thanks for the advice. I went w cheater on the breaker bar, with liquid wrench, not wd40, and it broke loose. Replaced the rod using Teflon tape, all back together now. The one that came out was gone just to the size of a welding rod! Definitely time for a new one! Again, thanks… love this forum!
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Donald Curtis, CTVMotors Garage, just down from the Mars Hotel
2016 RP 179; 2015 3.7 V6 F150; 2015 HD Road Glide Four wheels move the body; two wheels move the soul... |
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lostagain
Senior Member
Joined: 06 Sep 2016 Location: Quaker Hill, CT Online Status: Offline Posts: 2595 |
Posted: 21 May 2021 at 9:59pm |
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According to the "Project Farm" Liquid Wrench seems to be one of the best penetrating oil.
Here's the comparison of different penetrating oils: https://www.youtube.com/watch?v=xUEob2oAKVs |
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Never leave footprints behind.
Fred & Maria Kearney Sonoma 167RB Our Pod 172 2019 Ford F-150 4x4 2.7 EcoBoost |
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Replacing Rusted anode rod?