Lifeboat Conversion Ep47: Discovering a very unhealthy exhaust pipe hidden beneath heat lagging [4K]
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- čas přidán 10. 09. 2024
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EPISODE 47
Alan's engine has, from the start of my ownership, run sweetly and without undue vibrations or other drama. The exhaust appeared healthy, with no dirty output. That is, until recent inspection after a period of prolonged engine running. Clearly, all is suddenly not well with the exhaust, and it needs fixing.
Products mentioned:
Former Royal Navy Mechanical Engineer Officer and master-raconteur
Bukh DV48 turbo diesel 3-cyl engine
Mild steel Bukh exhaust pipe
Glassfibre lagging cloth
Glassfibre lagging rope
Model: NME A/S (Husnes, Norway) 7.5m TELB
Engine: Bukh DV48 turbo diesel
Feel free to ask any questions in the comments!
___
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Thanks to vanguardstorag... for warehousing facilities.
![Lifeboat Conversion Ep48: Rusty exhaust removal, turbo inspection...& more searchlight housing [4K]](http://i.ytimg.com/vi/bEkHKrxZBPE/mqdefault.jpg)
![Lifeboat Conversion Ep48: Rusty exhaust removal, turbo inspection...& more searchlight housing [4K]](/img/tr.png)
![Lifeboat Conversion Ep49: Electric? An engine backup plan, if Alan's Bukh diesel fails at sea. [4K]](http://i.ytimg.com/vi/zD4cF3oIG5E/mqdefault.jpg)
An enormous HAPPY BIRTHDAY to my ever-patient consultant, star of this episode.
Happy Birthday!
🎂
Do an interview with your dad on Arguably. I don't think I have ever met an ex-military person without at least a handful of entertaining stories. (In this case, entertaining covers a multitude of sins!)
... and many, many! Happy Returns !
. . . managed, just, not envie your boat . . .
Your Dad, ...
i wish i could've been there, invisible, silent, ...
for one more story ... 😉
Thank You, Sir, for ... know-how that's still worth something . . .
🙏🏼❤️🖖🏼
happy birthday! everything is easier an more fun when your dad is helping you. the other day i had a blast while baking a cake. granted we burned the cake so bad it looked like charcoal but it was fun nonetheless
The skill of an egyptologist unwrapping a mummy combined with finesse of a cardiovascular surgeon. Alan it's good to see you in such safe pairs of hands.
With a pair of Kevlar shears.
That punch line killed me: "Thanks dad"
Marvelous
I would recommend you put a camera ( car back up camera ) in your engine bay
And a small led light
That way you can keep a eye on the engine with out pulling everything a part
Also they come in 12 and 24 volt or both
Internal CCTV - oui!
24 hour streaming of alan's engine! nice
I may had that most car back up camera you can buy come with fairly powerful LED mounted next to the lens !
"We shouldn't expect too much from flappy things" - Alex Hibbert - Words to live by! Had I only known this at 20. lol
"Weldy people", yeah they're going to love that..
Well, they call sailors "ropey people". 😃
I worked for a ferry service which shall remain unnamed, and there was a story rolling around about taking one of the ships down to louisiana for overhaul. They'd shorted themselves on fuel for the next days trip by their standard math because, hey, boats empty, we should be good. As they were lining up at the pier for the night, just as the guy on the bow got a line to the pier, one engine cut out. They literally docked with the fuel in the lines.
The context of the story was a huge (contained and extinguished) boiler room fire, but yes, needing everyone to be at the top of their game.
@@AlexHibbertOriginals A large boiler room fire is kind of terrifying all on its own.
Wonderful help from a true Expert.
Ever-reliably so.
Truly a very fitting expert consultant you were able to get there :D Alan in this lineup clearly being the commander's choice ;) Weldy ... my youngest son just signed an apprenticeship contract to become an all-metal precision welder. Unfortunately, he might be ready way too late for the exhaust pipe. Shame really O.o
Precision is what we need.
Is there potential for an interview with said expert..?
True legends remain part-enigma!
@@AlexHibbertOriginals Fair play. I know my place.
And I thought it was a slipping belt. Good job you have an expert.
Memory card nightmares will haunt you now 🤣🤣 great update 2x👍
Cheers
. . . WHAAAT ? 😳
ALAN's on top of the list, clearly .. ??
🙏🏼😉🖖🏼
All the lists that matter
On getting a pipe made, best off just letting the weldy-person get the pipes, they know what is good and what they can get for a decent value
True
@@AlexHibbertOriginals not neccessarily as a shipbuilder I would suggest 316 ss for the whole thing. No fancy coatings required but ensure they are familiar with ss many are not and will cheap out and the arctic is the LAST place you need a broken exhaust ! Been there
Hi Alex, I was really inspired by your talk the other day and the CZcams channel is really interesting and cool, thanks very much!
Cheers Doug!
I believe that exhaust pipe heat will keep the lagging dry. It may be much cheaper to replace the exhaust pipe with more mild steel and just use the engine more. However stainless would be better, just more expensive.
Yes I think you're right. It was run only sporadically for years. Most use has been over the last year or two, and then, only about 3 days of solid running.
Alex, As a past life lifeboat servicing engineer I would suggest you don't use stainless for your exhaust it would have to be 316 and with the galvanic reaction and the brittleness with vibration from fixed ends not so good. If you buy a heavier wall mild steel pipe and several cans of VHT Flame Proof ceramic paint and spray some into a tin and pour inside, spray the outside then use thin sheet silicone taped over the pipe before the heat wrap. You can buy or make spring loaded "flappy things" to help reduce trailing sea wash. Good Luck
Thanks Bruce. The quotes I have for 316 throughout, with flexi sections to reduce vibrations, aren't too bad compared to cheaper stainless or even mild. I think by the time I've used specialist treatments for mild steel, silicone wraps etc, the finances would be similar. It's a dry exhaust, so I'm not so concerned about galvanic corrosion. It'll be isolated from other metals.
Dear alex they have double wall exhaust pipe so no need to wrap it and it would be safe to touch and add heat!
Bonus video content at the end! Woohoo!
Always, always giving you more.
Lol, I have a slappy thing on my face, I don’t expect much from it either 😂
Make sure you use decent stainless, cheaper stuff will end up rusting
Indeed - 304 at least
The engineer I employed has a long list of great Royal Navy Warships; HMS London, destroyer, HMS Blake, cruiser, HMS Bristol, destroyer, HMS Fearless, LPD, HMS Nottingham, destroyer. 2022? he now works on *Alan,* a watercraft that looks like an orange colored "Minion" from the movies doing the backstroke.
how the mighty have fallen
Take proper advice before using stainless steel for marine exhausts. I am not an expert, but have had problems with stainless exhausts on yachts, admittedly with water cooled exhausts not dry exhausts like Alan.
My understanding is that Stainless Steel is only stainless in the presence of oxygen, and very much dislikes chloride ions and sulphide ions, which lead to crevice corrosion, especially around welds.
In the exhaust of a hard working diesel engine there is not much oxygen and quite a few sulphide ions. Plenty of chloride ions in salt water also..
There may be a grade of stainless that will work well, coupled with proper pickling after welding, but do check, not just assume that stainless will be better..
Yes I encountered the various SS grades early on in the project. The data I saw suggested that 316 may lose 0.1mm/yr if immersed in water with these ions present, and with oxygen absent. 304 loses 0.2-1mm/yr, which would be a problem for a wet exhaust. A dry exhaust won't be immersed in ion rich water, and will have exposure to oxygen.
Rather like galvanic corrosion, stainless steel bolts in mild steel plate will cause a major reaction when immersed, but very little drama if mostly dry.
Bad news about this exhaust, but hey, so much the better that it gets there, well, just one piece of advice, all in stainless steel, they make this siphon for the... land prepared, if not for the rest of the piping, well, go see some guys who do tuning, they will surely have cheap addresses, you will surely be able to do the collector in ceramic treatment, courage, good luck!!!
06:18 Wait I thought you were planning to go on expedition in the north pole with this boat but not to be the one to save the guys of the red tent from the Italia airship, what do you need a flux capacitor for?
I'm pretty much sure that you've already jocked about it but I don't have the will to rewatch past video just to find the moment, so I hope I'll be excused
Back To The Future jokes always welcome.
The fickle CZcams gods have rendered their judgment and I am back.
Welcome back
Go with at least 304 stainless pipes not 409, which could be tempting due to the price. If I were around your area I would gladly weld it up for you for free, but alas I’m not there often. Then think about coating the exhaust before wrapping, like the equivalent of POR15 high temp coating. Coating the internals would be good but cumbersome.
For the price difference get 316 and never worry. Just make sure your welder only uses 316 rods. Spend the couple of extra bucks and get/ make 316 flanges.
Those wraps will wreck a Jeep exhaust too.
I need a serious research session to find a better lagging.
@@AlexHibbertOriginals
I'd recommend a high temperature exhaust enamel header paint as a base layer but it outgasses with a lethal smelling smoke as it cures. Not safe for a boat's cabin.
Exhaust wrap is staggeringly hydrophilic. It could end sea level rise.
Period Triumph and BSA motorbikes had the same problem with wrapped exhausts. Looks nice but hides a plethora of issues !
I haven't had any problems with wrapping stainless. I installed standard glass fibre exhaust wrap on my trials car about 15 years ago. The headers get covered in mud and water and I have see no evidence of corrosion. The steel O2 sensor bung in the exhaust is completely rusted away. Admittedly this is not salt water.
Glad you were able to find the issue. Do you think that the cowling is a little to complex if you need to access the engine in a hurry in extreme conditions? I also never really got a good perspective of just how much space was inside of Alan, it was an interesting angle from the stern there. Do you plan on changing the exhaust outlet or will that flappy thing be ok?
I will probably send you an email this week, please keep an eye out for it!
The panels come off in seconds - so there's access. 15mins was for the entire disassembly.
I plan to keep the flappy thing - it works nicely.
What was the name of your expert him - I may be a contemporary? BTW I would replace the exhaust with mild steel, well painted and the snazzy lagging - much cheaper and likely to last for your ownership/10 years.
SS isn't too pricey. If it were 10x the cost I'd be tempted to agree.
yep, not a lot of exhaust pipe shops in the Arctic. Any thought of double walled? Being a land lubber I was just curious.
Can't see many double wall ones on the market. I think a well considered lagging will suffice.
can I live on that sometimes, keep an eye on it for you, shame not to use it all the time and just when you want to use it.
I will buy the fuel, have you fitted a shower in it, very handy as people get smelly quick inside airtight vessels :-(
arctic expedition when?
Scheduling to head north next summer.
black mess of the dusty variety has ruined my weekend
For the love of God please put a carbon monoxide/co2 detector.. Or 3. O and stainless steel bellow style flex joints are way better and don't leak, allso pack a few packs of Holts gun gum or similar to repair any leaks on your travels... Even the best stainless steel can randomly break because the universe is harsh... Mount the detectors low down btw
Already installed, and with no need for any god to get involved!
@@AlexHibbertOriginals I'm deeply pleased to hear you did... A month ago someone I know died of carbon monoxide poisoning its real
My goodness.. to think if only you had not lost that footage. you would surely be giving mr beast a run for his money at this point.
Well, yes exactly. I have only myself to blame. And I had to google Mr Beast.
@@AlexHibbertOriginals I do not watch his content... as you can see I only watch the most riveting and daring content CZcams has to offer, Such as adding drain holes to your hatch door and insulation to the extreme. Who has time for his childish act's of tomfoolery? But yes you surely would have toppled his ratings and brought the "beast man" to his CZcams career ending knees. But there is always next time.