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LogicaL Chaos
Ascension Energy & Alien UFOs




Registered: 05/12/07
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Repairing a Piston Head
#25979119 - 05/08/19 03:24 AM (4 years, 8 months ago) |
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So i want to repair a piston head for a 2-stroke engine. It has a "crater" on the top.
My idea was to by JB ExtremeHeat Epoxy on it: https://m.ebay.com/itm/Part-37901-J-B-Weld-Co-JB-Weld-3-OZ-Extreme-Heat-Hi-Temp-Resistant-Paste-Epox-/153080472563?_mwBanner=1&_rdt=1
Will it work? Will it last? Should i just plan on replacing the piston head (a complex task)?
-------------------- "What you must understand is that your physical dimension affects everyone in the higher dimensions as well. All things are interconnected. All things are One. Therefore, if one dimension is broken or out of balance, then all other dimensions will experience repercussions." - Pleiadian Prophecy 2020 The New Golden Age by James Carwin PROJECT BLUE BOOK ANALYSIS! (312 pages!) | Psychedelics & UFOs | Ready to Contact UFOs? | The Source on Mushrooms | Trippy Gematrix | Dj TeknoLogical | Fentanyl Test Kits R.I.P. Big Worm || The Start of the Ascension Process was 2020. Welcome to the Next Great Era of Earth 🌎🌍🌏
  Oregon Eclipse Festival 2017 :: Aug 19th - 21st :: Pure Paradise   Very Effective LSA Extraction Tek | 💧 Advanced Cold Water LSA Extraction Method 💧 |  Mescajuana - Mescaline with Marijuana | DMT Dab Bongs | UFO Technology! Shpongle
     
Edited by LogicaL Chaos (05/24/20 05:17 PM)
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Jokeshopbeard
Humble Student

Registered: 11/30/11
Posts: 26,088
Loc: Deep in the system
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Yes, replace the piston. You don't want that gunk rattling round in a cylinder unless you want to damage the whole head.
-------------------- Let it be seen that you are nothing. And in knowing that you are nothing... there is nothing to lose, there is nothing to gain. What can happen to you? Something can happen to the body, but it will either heal or it won't. What's the big deal? Let life knock you to bits. Let life take you apart. Let life destroy you. It will only destroy what you are not. --Jac O'keeffe
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LogicaL Chaos
Ascension Energy & Alien UFOs




Registered: 05/12/07
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Just wanted to update. I made the repair and it works! No idea how long it will last, but its working
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Tulipslave
Homo sapiens sapiens, lol

Registered: 07/25/17
Posts: 11,109
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Quote:
LogicaL Chaos said: Just wanted to update. I made the repair and it works! No idea how long it will last, but its working 
it won't
replace the piston before you fuck up the cylinder and/or the rod.
even moments can do damage.
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LogicaL Chaos
Ascension Energy & Alien UFOs




Registered: 05/12/07
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Re: Repairing a Piston [Re: Tulipslave] 1
#26293157 - 11/01/19 11:45 PM (4 years, 2 months ago) |
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Luckily I have a spare cylinder on hand
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alaskappalachian
Entitiologist


Registered: 10/22/19
Posts: 1,674
Loc: The 49th Dimension
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Post deleted by alaskappalachian
Reason for deletion: old post im a retard
-------------------- "First we build the tools, then they build us." THE 49th MYCOJOURNAL: Exotics, Auroras, and Entities
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LogicaL Chaos
Ascension Energy & Alien UFOs




Registered: 05/12/07
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Definitely.
Im ordering a new piston next spring season. They seem to be the one part that wears out fast on jetskis, at least the one I own.
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alaskappalachian
Entitiologist


Registered: 10/22/19
Posts: 1,674
Loc: The 49th Dimension
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oooohh gotcha. Super common problem. People like to get on them an GO, so that creates problems. They sieze and break free, which can chip off material. Scoring and damage to rings are both very common. Material might land in the crankcase or be expelled. Likely expelled if the damage is where I think you're saying it was. While you're in there, get you a couple things like a rebuild kit for your carb (cheap), inspect crank, lines, etc...
-------------------- "First we build the tools, then they build us." THE 49th MYCOJOURNAL: Exotics, Auroras, and Entities
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LogicaL Chaos
Ascension Energy & Alien UFOs




Registered: 05/12/07
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Yeah, I think I have to tune the carb. Its a condition called "piston burndown". Something about being too lean I believe? I gotta learn to tune that carb.
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alaskappalachian
Entitiologist


Registered: 10/22/19
Posts: 1,674
Loc: The 49th Dimension
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Yup- running lean is gonna damage the crown, for sure. It's just turning a couple screws. Wonder how your plugs look.
-------------------- "First we build the tools, then they build us." THE 49th MYCOJOURNAL: Exotics, Auroras, and Entities
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LogicaL Chaos
Ascension Energy & Alien UFOs




Registered: 05/12/07
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Could the plugs timing also contribute to the burn-down effect?
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alaskappalachian
Entitiologist


Registered: 10/22/19
Posts: 1,674
Loc: The 49th Dimension
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Quote:
LogicaL Chaos said: Could the plugs timing also contribute to the burn-down effect?
Well... only if your plugs weren't seated correctly and air entered the cylinder and leaned out the mix. Sometimes they loosen up while you ride, and it's worth checking the torque periodically to make sure one hasn't loosened up after some riding. I would say that in your case, it was likely lean carb jetting which caused overheating. Especially if you've never adjusted your carb. Again this is the most likely casue, although there are a couple other things that (especially on older engine- think seals/gaskets) that can cause overheating of the piston/failure.
Edit: I need to learn how to read before I post. While the above is true (I just saw the word "timing" for some reason. This is what I get for posting before coffee...). Ignition timng can definately contribute to failure (too high & pressure created during combustion too high and causes damage). I doubt that's your key problem though. A complete teardown will be an awesome learning experience for you and will enable you to eliminate all present and future (controllable) problems. Thank God for the internet age and cheap(ish) parts/kits!! Woohoo!
-------------------- "First we build the tools, then they build us." THE 49th MYCOJOURNAL: Exotics, Auroras, and Entities
Edited by alaskappalachian (11/02/19 01:17 PM)
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LogicaL Chaos
Ascension Energy & Alien UFOs




Registered: 05/12/07
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Update. Im getting my jet ski ready for tomorrow (Memorial Day!) for the lake and I checked out the piston head I repaired.
The Bad news is the repair is gone (burned away). You can still see some of the remnants in the center-left of the piston head:

The Good news is theres no damage to the cylinder:

So this repair does work but it doesnt last very long. I think I rode my ski like 3 times last year or something.
Its great for a temporarily fix but definitely not a long term fix at all. Looks like Im going to have to replace the piston as Jokeshop mentioned. Damn.
-------------------- "What you must understand is that your physical dimension affects everyone in the higher dimensions as well. All things are interconnected. All things are One. Therefore, if one dimension is broken or out of balance, then all other dimensions will experience repercussions." - Pleiadian Prophecy 2020 The New Golden Age by James Carwin PROJECT BLUE BOOK ANALYSIS! (312 pages!) | Psychedelics & UFOs | Ready to Contact UFOs? | The Source on Mushrooms | Trippy Gematrix | Dj TeknoLogical | Fentanyl Test Kits R.I.P. Big Worm || The Start of the Ascension Process was 2020. Welcome to the Next Great Era of Earth 🌎🌍🌏
  Oregon Eclipse Festival 2017 :: Aug 19th - 21st :: Pure Paradise   Very Effective LSA Extraction Tek | 💧 Advanced Cold Water LSA Extraction Method 💧 |  Mescajuana - Mescaline with Marijuana | DMT Dab Bongs | UFO Technology! Shpongle
     
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BattyKoda
WCA President



Registered: 09/11/17
Posts: 8,021
Loc: Boof Hard Or Go Home
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Go ahead and get used to rebuilding the moter. Two strokes are notorious for blowing up. Good luck lodge.
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  A Man Must Learn To Sail In All Winds. RIP ModestMouse & Big Worm
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LogicaL Chaos
Ascension Energy & Alien UFOs




Registered: 05/12/07
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Re: Repairing a Piston [Re: BattyKoda]
#26693327 - 05/24/20 06:10 PM (3 years, 8 months ago) |
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blowing up 
Yeah, Ive already replaced one piston. It sucks, but part of owning a 2-Storke with carbs that are not tuned right, aimirite?
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BattyKoda
WCA President



Registered: 09/11/17
Posts: 8,021
Loc: Boof Hard Or Go Home
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Idk what it's called. Ive always called it blowing the moter.
I had two blaster 200s. One was bored out to a 240. Im not very mechanically inclined but i paid to have it rebuilt quite a few times. Never go cheap. Never cut corners. It cost more in the long run.
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  A Man Must Learn To Sail In All Winds. RIP ModestMouse & Big Worm
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LogicaL Chaos
Ascension Energy & Alien UFOs




Registered: 05/12/07
Posts: 69,323
Loc: The Inexpressible...
Last seen: 25 minutes, 7 seconds
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Cancelling my piston repair, my SteelStick High-Temp Repair Epoxy hardened up in the container. It is useless. I guess its one-time use only. Still going to the Lake tomorrow thou.
Also my phone isnt working right so no pics of my awesome cleaning job.
Looking for my trailer hitch.....I cant seem to find it.....
Blowing up a motor usually means total destruction of the motor, like a piston rod goes thru the engine itself, at least thats my definition. What my engine is doing is called Piston Burn Down.
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BattyKoda
WCA President



Registered: 09/11/17
Posts: 8,021
Loc: Boof Hard Or Go Home
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Im sorry lodge. You'll get it right. Good luck bud. Be safe.
--------------------
  A Man Must Learn To Sail In All Winds. RIP ModestMouse & Big Worm
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LogicaL Chaos
Ascension Energy & Alien UFOs




Registered: 05/12/07
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Re: Repairing a Piston [Re: BattyKoda]
#26693546 - 05/24/20 07:41 PM (3 years, 8 months ago) |
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Thanks mang. I will be safe. Dont want to crash into any boaters or swimmers out there!
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bodhisatta 
Smurf real estate agent


Registered: 04/30/13
Posts: 61,889
Loc: Milky way
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Think about the job the piston does in a combustion engine. NASA's JB weld isn't going to work either.
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