This cylinder is toast, right?

[bama]

Here are the pics. The nikasil is starting to go on the bottom. Am I correct in my assessment? This is still pretty new to me. Sorry for the large size. I have to learn how to do that, someday.

http://www.arboristsite.com/attachment.php?attachmentid=41246&stc=1&d=1165536110

http://www.arboristsite.com/attachment.php?attachmentid=41247&stc=1&d=1165536110

 

[PES+]

Definite

Toast
The pieces that are missing there are what most likely left the marks in the top band if you reuse it more will flake off until nasty failure

 

[p38lightning]

I'm afraid that one is done bro.

 

[PES+]

Did you by chance use acid to remove some melted aluminum from the bore?

I never would use acid on a plated or plasma sprayed bore because it will do just this.
I do not even use it in cast iron sleeves due to it's speed of penetration into aluminum. I only use acid on cranks but not in saws

 

[p38lightning]

Did you by chance use acid to remove some melted aluminum from the bore?

I never would use acid on a plated or plasma sprayed bore because it will do just this.
I do not even use it in cast iron sleeves due to it's speed of penetration into aluminum. I only use acid on cranks but not in saws

That is a good point PEST. I used acid on a old jug just to see how it worked and it eat the plating off. I never have used it on anything else.

 

[PES+]

I saw others posting about using muriatic

And I just waited for the inevitable. If you can keep the even diluted acid away for all the aluminum you might have a chance but there is no way I can see how you would be able to do that. Muriatic acid etch in aluminum is instant and ruins the bond between the nikasil and aluminum

crunch .......flake .........screech

 

[bama]

Did you by chance use acid to remove some melted aluminum from the bore?

I never would use acid on a plated or plasma sprayed bore because it will do just this.
I do not even use it in cast iron sleeves due to it's speed of penetration into aluminum. I only use acid on cranks but not in saws

Yes, I used acid, but the plating was gone on the bottom portion. There may have been some penetration on the higher portion of the sides, but I guess I never really figured that the cylinder would be usable.

I haven't had a problem on the cylinders I have cleaned up with acid, but I have only done a dozen or so. I try to use just enough to get the aluminum and then wash it out right away with soap and water. I prefer to find cylinders in good working order to making them work.

The piston was pretty bad, but I was surprised it was by the transfers and not by the exhaust. Is that because of the open vs. closed transfers?

Any luck on that cylinder, PEST?

 

[PES+]

Which cylinder? Was it you needing the Partner cylinder?

I am a bit flu-ish and not up to par so if you could refresh my memory

 

[windthrown]

Groovy man...

Groovy cylinder = toast.

Looks like an Echo blower that I smoked once.

 

[Lakeside53]

I've never had any problem with acid.. and I just use the same strength available at HD - for concrete cleaning).

It's just a few drops put on with a q-tip, rubbed with a fine scotchbrite, thoughly washed off and then I put the entire cylinder in Purple cleaner (diluted) to neutralize any residual acid.

What I do like about acid is that it immediately shows (after honing) if you have a cut in the nikersil/chrome - the aluminum will show up as dark.

 

[bama]

I've never had any problem with acid.. and I just use the same strength available at HD - for concrete cleaning).

It's just a few drops put on with a q-tip, rubbed with a fine scotchbrite, thoughly washed off and then I put the entire cylinder in Purple cleaner (diluted) to neutralize any residual acid.

What I do like about acid is that it immediately shows (after honing) if you have a cut in the nikersil/chrome - the aluminum will show up as dark.

Lakeside, what is Purple cleaner? Where do I get it? Will it take the grime off the outside of a cylinder. I can't get that junk off even with gasoline. I don't have access to many "hi tech" solutions, so I am always in search of the "magic" cleaning solution.

 

[Lakeside53]

Lakeside, what is Purple cleaner? Where do I get it? Will it take the grime off the outside of a cylinder. I can't get that junk off even with gasoline. I don't have access to many "hi tech" solutions, so I am always in search of the "magic" cleaning solution.

It's the same as Castrol Super Clean - most autoparts stores carry it.. Purple cleaner - one of the many generics with similar names. Dilute it 4:1, and never let it dry on alumiunum... and Wash thoughly...

 

[bama]

Thanks, Lakeside. I will give it a try.

 

[p38lightning]

It's the same as Castrol Super Clean - most autoparts stores carry it.. Purple cleaner - one of the many generics with similar names. Dilute it 4:1, and never let it dry on alumiunum... and Wash thoughly...

Boy you got that dry on aluminum part right. I left an old cylinder to soak in it for a day or two just to see how it worked and it came out about the size of a softball. I usually just soak my stuff in carb cleaner (dip style) or just sit it in the parts cleaner for a day or two.

 

[belgian]

can it be saved ?

thought this was the right thread to ask : have a look at the pic and please let me know if this cylinder can be salvaged ? It has the same marks on the inlet as outlet side. Pic of the piston is for info only.

 

[Hard Knocks]

Looks pretty bad! If those grooves are as deep as they look, I doubt that it will clean up.

 

[Tree Sling'r]

The purple cleaner is called "Purple Power", can't get Castrol Super Clean in Calif. so I tried this stuff. Used a 40oz. spray bottle then bought another full gallon at Wal-Mart. I was able to get carbon off of the tops of cylinders be letting it soak.
Good stuff and very affordable.

 

[Lakeside53]

They don't look deep... You really won't know unless you hone it. The piston is obviously toast.


A new piston/cylinder from Tecomec is about a $100 over here...

 

[oldsaw]

They don't look deep... You really won't know unless you hone it. The piston is obviously toast.


A new piston/cylinder from Tecomec is about a $100 over here...

Yeah, the cylinder looks amazingly clean for that piston...that is one nasty slug-o-scrap metal.

Mark

 

[buck futter]

bama, thats not pretty but there is a chance depending on your resources and handyness. what saw does this go on?
If the squish band is pitted you coult cut it with a lathe. you could relieve the bad part of the transfers equally on each side and knife edge the divider. you could probably pick up a little power too.

the easy way is to buy new. something came apart in the bottom end I assume and is probably toast.



Belgian, hone it I think you will be ok. that piston is only good for a paper weight.


Buck