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help with a piston (solved)
Page 1 of 1
help with a piston (solved)
i have a super tigre s2000 25cc glow engine that i purchased used for $60 a few months ago, and i took the cylinder head off last night to look inside, and it appears some one drilled a small whole (1/64-1/32'') in the head of the piston : @#!*% : i think i might turn a new piston on a lathe in my cnc class if i can stay after class ends.
does anyone have suggestions on how to go about this repair? i still need to find out if the piston is aluminum or steel, should i make a new sleeve to fit inside the cylinder also?
and how would i remove a prop drive plate that is held on by a collet?
how should i go about making a new piston ring, as this is a ringed engine
thanks, for putting up with all my questions, you guys have been a great help for me and i look forward to learning more for this awesome forum![Smile](https://2img.net/i/fa/i/smiles/icon_smile.gif)
MitchG95
does anyone have suggestions on how to go about this repair? i still need to find out if the piston is aluminum or steel, should i make a new sleeve to fit inside the cylinder also?
and how would i remove a prop drive plate that is held on by a collet?
how should i go about making a new piston ring, as this is a ringed engine
thanks, for putting up with all my questions, you guys have been a great help for me and i look forward to learning more for this awesome forum
![Smile](https://2img.net/i/fa/i/smiles/icon_smile.gif)
MitchG95
Last edited by mitchg95 on Sat Aug 25, 2012 5:08 pm; edited 1 time in total
mitchg95- Diamond Member
- Posts : 2103
Join date : 2011-12-19
Age : 29
Location : Geneva, mn, USA
Re: help with a piston (solved)
i search "why does my piston have a whole in the top" and found a snow mobile forum where some one posted that they have a whole in the top of the piston that just "appeared" and they have not messed with the engine in any way, well, from what i read is that they ran the engine to lean and it caused a whole to be burned in the top of the piston
Do you think this is what could have happened to my piston, the previous owner ran it to lean?
some one else with a whole burnt into there piston http://www.greenhulk.net/forums/showthread.php?t=59223
how ever the pictures he shows of the whole are different than what my whole in the piston looks like, again mine looks like it was drilled into?
i have pics ready of the whole in the piston, i just have to figure out why i cant get into my servimg account
Do you think this is what could have happened to my piston, the previous owner ran it to lean?
some one else with a whole burnt into there piston http://www.greenhulk.net/forums/showthread.php?t=59223
how ever the pictures he shows of the whole are different than what my whole in the piston looks like, again mine looks like it was drilled into?
i have pics ready of the whole in the piston, i just have to figure out why i cant get into my servimg account
mitchg95- Diamond Member
- Posts : 2103
Join date : 2011-12-19
Age : 29
Location : Geneva, mn, USA
Re: help with a piston (solved)
I used to do something similar with my Suzuki X7 production
Racer every 2 races or so back when Noah was building his boat
Mitch. Very expensive forged pistons were the answer.
Racer every 2 races or so back when Noah was building his boat
Mitch. Very expensive forged pistons were the answer.
![Shocked](https://2img.net/i/fa/i/smiles/icon_eek.gif)
John Goddard- Diamond Member
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Re: help with a piston (solved)
John Goddard wrote:I used to do something similar with my Suzuki X7 production
Racer every 2 races or so back when Noah was building his boat
Mitch. Very expensive forged pistons were the answer.
![]()
? were would i get a forged piston for this engine?
mitchg95- Diamond Member
- Posts : 2103
Join date : 2011-12-19
Age : 29
Location : Geneva, mn, USA
Re: help with a piston (solved)
mitchg95 wrote:John Goddard wrote:I used to do something similar with my Suzuki X7 production
Racer every 2 races or so back when Noah was building his boat
Mitch. Very expensive forged pistons were the answer.
![]()
? were would i get a forged piston for this engine?
Mitch, if you have a hole in your piston something ain't right and should be addressed along with replacement of the piston. Holing usually occurs when ignition timing is off as well as lean burning. Your cheapest and safest route would be to find a stock piston for it and figure out what holed the piston in the first place. A good cleaning is adviseable to find out if any metal went through the engine.
Ron
Cribbs74- Moderator
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Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
Re: help with a piston (solved)
cribbs74 wrote:mitchg95 wrote:John Goddard wrote:I used to do something similar with my Suzuki X7 production
Racer every 2 races or so back when Noah was building his boat
Mitch. Very expensive forged pistons were the answer.
![]()
? were would i get a forged piston for this engine?
Mitch, if you have a hole in your piston something ain't right and should be addressed along with replacement of the piston. Holing usually occurs when ignition timing is off as well as lean burning. Your cheapest and safest route would be to find a stock piston for it and figure out what holed the piston in the first place. A good cleaning is adviseable to find out if any metal went through the engine.
Ron
i hope metal did not go through, i looked for parts for this engine and i could not find any, the search will continue
mitchg95- Diamond Member
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Re: help with a piston (solved)
![Hosted by imgur.com help with a piston (solved) 4lvOk](https://i.imgur.com/4lvOk.jpg)
mitchg95- Diamond Member
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Join date : 2011-12-19
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Re: help with a piston (solved)
Well there's your problem right there - somebody stuck an ink pen in your piston.
But seriously man, you gotta do something about the size of your pics. On my screen, your avatar is bigger than your pictures. And oh yeah, that hole is from a hot spot formed during preignition, I think.
![help with a piston (solved) Pichel10](https://i.servimg.com/u/f32/17/62/19/08/pichel10.jpg)
![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
![help with a piston (solved) Pichel10](https://i.servimg.com/u/f32/17/62/19/08/pichel10.jpg)
lousyflyer- Gold Member
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Age : 64
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Re: help with a piston (solved)
lousyflyer wrote:Well there's your problem right there - somebody stuck an ink pen in your piston.But seriously man, you gotta do something about the size of your pics. On my screen, your avatar is bigger than your pictures. And oh yeah, that hole is from a hot spot formed during preignition, I think.
That makes good sense. Most of the bigger Super Tiger engines are made to run on 5% and lower nitro yet most people treat them like a .40 size sport engine. Too much nitro could easily cause early detonation/pre-ignition and problems with the connecting rod.
Bob
fit90- Diamond Member
- Posts : 1337
Join date : 2011-08-11
Location : Naples, Florida
Re: help with a piston (solved)
lousyflyer wrote:Well there's your problem right there - somebody stuck an ink pen in your piston.But seriously man, you gotta do something about the size of your pics. On my screen, your avatar is bigger than your pictures. And oh yeah, that hole is from a hot spot formed during preignition, I think.
lol, my thats the best i can do with my imagur account, the next size larger would have only showed my hand, i was pointing out where the whole is with the pen lol
mitchg95- Diamond Member
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Join date : 2011-12-19
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Re: help with a piston (solved)
Taking a stab here, since I can't see anything in your picture, maybe just a hole for a piston ring retaining pin? Common practice on larger two stroke engines to keep rings from rotating so ring end doesn't snag in the exhaust port. Usually pin is pressed in radially (from the side...), but I have seen pins pressed in from the crown.
ahrma_581- Gold Member
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Re: help with a piston (solved)
Regardless, that piston's got to come out for closer inspection.
lousyflyer- Gold Member
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Age : 64
Location : Garden City Ga
Re: help with a piston (solved)
Well, the picture doesn't really show anything. But if the hole is at the outer rim right next to the piston-ring then it is bound to be a hole for the ring alignment pin. It cannot be related to pre-ignition, that would give you a distorted piston around the center. And certainly not something that looks drilled.
If the engine runs, then just leave it as it is, don't fix something that isn't broken.
If the engine runs, then just leave it as it is, don't fix something that isn't broken.
Surfer_kris- Diamond Member
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Location : Sweden
Re: help with a piston (solved)
Surfer_kris wrote:Well, the picture doesn't really show anything. But if the hole is at the outer rim right next to the piston-ring then it is bound to be a hole for the ring alignment pin. It cannot be related to pre-ignition, that would give you a distorted piston around the center. And certainly not something that looks drilled.
If the engine runs, then just leave it as it is, don't fix something that isn't broken.
that is probably it, it is near the outer rim
thanks for all the help guys
![Smile](https://2img.net/i/fa/i/smiles/icon_smile.gif)
i just need a muffler now...
mitchg95- Diamond Member
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Re: help with a piston (solved)
And an image host.mitchg95 wrote:...thanks for all the help guys
i just need a muffler now...
![Smile](https://2img.net/i/fa/i/smiles/icon_smile.gif)
_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
RknRusty- Rest In Peace
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Re: help with a piston (solved)
RknRusty wrote:And an image host.mitchg95 wrote:...thanks for all the help guys
i just need a muffler now...Photobucket works well for me.
ill look into photobucket
![Smile](https://2img.net/i/fa/i/smiles/icon_smile.gif)
mitchg95- Diamond Member
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Re: help with a piston (solved)
![help with a piston (solved) 3543b953](https://2img.net/h/i1077.photobucket.com/albums/w473/mitchg95/3543b953.jpg)
haza it worked
![Smile](https://2img.net/i/fa/i/smiles/icon_smile.gif)
mitchg95- Diamond Member
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Re: help with a piston (solved)
Yes, that is for the pin that keeps the ring form rotating.
Surfer_kris- Diamond Member
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Join date : 2010-11-20
Location : Sweden
Re: help with a piston (solved)
Well that has to be a huge relief. Not many times a hole in a piston isn't a bad thing.
_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
RknRusty- Rest In Peace
- Posts : 10869
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Age : 68
Location : South Carolina, USA
Re: help with a piston (solved)
RknRusty wrote:Well that has to be a huge relief. Not many times a hole in a piston isn't a bad thing.
it is, im sure glad that it is meant to be there
mitchg95- Diamond Member
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