sleeve pincher

[flandersander]

Do you think I could make one? I was thinking a ring of steel with a bunch of holes with long screws running through it. Then a whole bunch of part circles that once tightened would tightly secure around the sleeve. The part circles would be inside the steel ring and tightening the screws a tiny bit at a time would pinch the sleeve very slowly. What do you think?

 

[ohmygahitscoby]

Here's a diagram.

What I mean by threaded and not threaded: You know how when you look down a screw hole, there are those side things around the hole (The one that guide the screw down the hole), one of them will have those (Threaded side) and one of them will not. If you look at it as a stripped screw hole, the stripped screw hole in the No Thread one.

 

[flandersander]

Thats kind of what I was thinking. Except instead of bending the steel i was thinking of something more like this.

 

[flandersander]

That is what I was talking about. But no colors.

 

[ohmygahitscoby]

Wait, can you explain to me which part is which, like the little dots and the black lines please? Thanks.

 

[abadk9420]

Here's a diagram.

What I mean by threaded and not threaded: You know how when you look down a screw hole, there are those side things around the hole (The one that guide the screw down the hole), one of them will have those (Threaded side) and one of them will not. If you look at it as a stripped screw hole, the stripped screw hole in the No Thread one.

you can buy like this for $12.99 on ebay http://cgi.ebay.com/Piston-Sleeve-E...VQQcmdZViewItemQQ_trksidZp1638Q2em118Q2el1247

or you could just have it pinched the right way for $25.00 at http://www.rayaracing.com/ either way it would probly be cheaper then building one, but if you want to try building one go for it and let us all know how it works out...

 

[flandersander]

Ok well the outside circle is a ring of steel, the black lines are screws and the inside circle is the part that will contact the sleeve. They are attatched to the screws. They are small parts of a circle, and once tightened, they will fit perfectly around the sleeve. Then I can tighten them in small incraments and pinch the sleeve. Do you understand? Think it would work?

 

[ohmygahitscoby]

Actually, that won't work. What will happen is that when you do that, the screws don't push in the ring of steel, the ring of steel will stay in the same position but the screws will dig into the sleeve.

 

[flandersander]

But the screws aren't even close to the sleeve. They are attatched To parts of a seperate inner ring that would push on the sleeve the screws just apply the force. The screws would never touch the sleeve.

 

[ohmygahitscoby]

But the ring wouldn't shrink or the size wouldn't get smaller. If you use your diagram, you will end up with something like a flower.

You would need to add WAY more screws to fix that.


I think it would be best to buy one or just send one to be pinched by a professional.

 

[flandersander]

Thats not what it will be though. There will be spaces so its not a full circle. it wouldn't flower. It wouldn't be an inner circle. It would be a few circle segments that would be attatched to screws. Then each piece would put pressure on the sleeve.

 

[Cupooterluvr]

I think he's saying that you won't have exactly even pressure on all the screws. With the extremely tight tolerances these engines run at, that's a very bad thing.

 

[flandersander]

So you both realize what I am saying? Where its not directly a screw to the sleeve. its a piece of steel on every screw to even the load. Even if I used 2 screws on every piece of inner ring piece?

 

[ohmygahitscoby]

Oh okay. So each screw will be attached to a piece of steel. I guess it'll work. You basically just want to squeeze the sleeve so that the top of the sleeve is tight when the piston comes up.

Just to let you know, even though you successfully make one, you will still need to know how tight it should be.

 

[flandersander]

Well doesn't it just have to be tighter than it was before? just tighten it a bit and test it with the piston to see if it makes descent pinch. Is that how you would do it? Or what should I do?

 

[ohmygahitscoby]

Sometimes it can be pinched too much that it's almost impossible for the piston to pass.

 

[flandersander]

So just pinch it until its tight, then a tiny bit more? Or should I get a bran new set and see what the pinch in that is and try to replicate it?

 

[ohmygahitscoby]

Hmm, I'm not sure. If you buy the already pre-made ones, they already have the right pinch.

 

[flandersander]

Yeah but if I try to replicate that pinch on the worn out set, that would give me close to perfect pinch every time wouldn't it?

 

[Mattyfats420]

But the ring wouldn't shrink or the size wouldn't get smaller. If you use your diagram, you will end up with something like a flower.

You would need to add WAY more screws to fix that.


I think it would be best to buy one or just send one to be pinched by a professional.

yep thats the way i see that happening. there wouldnt be "professionals" doing this if any joe shmoe could make one on the weekend. or just buy the right tool for the job and make it easy on yourself.

i agree wit coby 100% on this one. save yourself the hard ache of ruining a sleeve that could be fixed professionally or with the right tool