the clamp he is using is called a high pressure bolted clamp and they only have them at ace hardware, I went to lowes and home depot and no luck, they were $8.99
Not a bad idea. I freaking love when people repair their own stuff instead of just going out and buying a part. This is a hobby and I also repair my own stuff. May I ask you if the chrome cracked any from the crimping? When I had to fix a piston to sleeve fit I was worried about crimping the chrome and having the chrome crack, so I did mine a different way. But yeah very cool man!! Way back many moons ago, I had a K&B .67ci Marine engine the one with the Zimmerman Reed valve induction. Anyways, I got the engine brand new and the engine lost compression when it was at running temp. What I did was I removed the piston from the con rod and found a perfect size socket, and heated up the piston and used a slug hammer and the socket to enlarge the top of the piston. After I knew I good fit I had to sand the top outer diameter of piston to smooth down any harsh 90 degree angles around the OD. basically I had to lap the piston to fit precise. That engine still runs today and strong 20 years running.
those collar clamps are very convenient to get another couple of races out of an old worn out engine. In my experience with them the repinch doesn't last very long, but maybe I'm not doing it right lol
TRX3.3 engine. That's 3.3cc, which translates to something like a .19 engine when expressed in cubic inches. The older .19 engines such as the O.S. .19 or the K&B .19 RC used a piston ring on the piston instead of a lapped aluminum piston. Ringed engines can be restored to running compression by replacing the ring and lapping the sleeve a little. Cheaper than replacing the cylinder sleeve and piston on a Traxxas 3.3. lapped aluminum pistons running in a chromed brass sleeve (ABC) are cheap to manufacture but they don't seem to last as long as a ringed engine.
I got the tubing and have cut it to size and my clamp is supposed to come in around next week. Seeing how these clamps are pretty much exactly the same as the actual tools used for repinching (they’re a little bit thicker but that’s where the copper tube comes in so the pinch doesn’t go too far down), I don’t see how this won’t work. I’ll give an update after the process and probably make a video of the whole procedure since none of the known, trusted people who have a repinch service don’t show the process. It makes sense though. If they showed their method, they’d lose business because people know for a fact that that method works. Update: it works very very well. I’ll upload a video on my other channel on the whole process sometime
@@gotnitro4329 I’ve used it for several .21 race engines and used a 3/4” clamp for .12 engines. Works great. I recommend using a one piece clamp instead of the two piece like in the video. The one piece doesn’t pinch quite as tight, but it’s more even so the engine re-break in is easier and it runs more consistent
@@gotnitro4329 I have a video on a different channel called MoralesRC Designs thats a pretty in-depth tutorial on how to do it. Just follow the tutorial but with a 3/4” Bore/Inner Diameter clamp instead of 7/8”. If you need to resize a 3.3, then you’d use a 7/8”
Great video! I was wondering why is it back if the temps on the motor get high for instance if the motor reaches 350 why is it bad? WOULD the sleeve need a repinch if it happened? I brought motors over 350 and nothing ever happened so why does everyone check temps for? Is it a long time thing
Heat causes things to expand especially metal.. Which cause loss of compression. Over time it really wears out your engine running to hot. The fix is to re pinch the sleeve. You will notice your engine does not idle properly or loss of power or after a few minutes you have stalling issues. This is signs of worn sleeve. Some engines definitely don't have these issues as often as others. For instance my OS 18cvr I've never had to pinch. Its a amazing engine. Where as my HPI engines I've had issues with in the past.
Montreal Audio systems , old mate is right heat expands things. There's more however, too much heat 350 ect will cause things to expand so much that sometimes the metal loses plasticity from being both stretched beyond its plastic point where it would shrink back to normal and just being too hot even weakening the strength of the metals. heat like that tends to change the way the metal is structured all the way down to how the metals grains line up and or stick together, just like a blacksmith "hardening" knifes or "softening" metal to be worked by using different temps and cooling. Also there's a few different metals in an engine, eg piston vs sleeve. One of them will expand more than the other. . . 200 deg might be OK theres not much difference in expansion or at least not enough to matter, maybe even just enough to help( actually the case) but more heat will make this gap much wider to where your sleeve expands so much more than your piston that the piston can wobble its top and bottom within the sleeve as apposed to the sleeve keeping the piston snug and straight. Hope this helps, at the end of the day the hotter metal gets the closer it gets to "melted" so to speak, melted means soft. Good luck!
no the .15 is a smaller diameter. There are guys on ebay now selling piston pinchers. They've already done the research to figure out what size you'll need. Other wise you could try ace hardware.Just bring your sleeve with you so you can try to match something up.
Okay, thanks for the response. I thought I had seen those sleeve pinching tools for .15 engines on eBay not long ago, now I'm only able to find the clamps for the larger displacement engines. Guess I'll keep looking, or like you said, bring my piston/sleeve to the hardware store and try matching one up. My hopes aren't very high that the hardware store will have one in that size though(guessing they'll only have sizes in 1/4" Increments, maybe 5/8"?)' Anyways, great video man! I'd definitely be interested in an update video on this subject if you have any new information/tips/precautions' to add to the first video, that is if you'd be willing of course😉.
One of my suggestions would be don't crank it all the way down right away, due it in small increments and check how tight it is. It can get really tight and its very difficult to turn over if you over due it. You will have to heat the heat sink with a torch to bring up engine temps to expand the cylinder to turn it over and start it.
please respond you i really need all your feedback as this hobby should be for anyone not just people who can drop a hundred bucks every time you loose compression you know what i mean?
The video gives you a list of all the parts needed and where to get them. The heading of this video gives you a name. Piston sleeve Pincher. Hope this helps answer your question.
Thanks for the video man. One question please are you using the copper pipe piece because you couldn't find a smaller clamp? Or do you need it for the correct way to pinch?
@@subsonicreviews1835 Its great that your trying to advertise for that company but if you watch the video you will see I'm using standard sizes now. You need the copper piece to make up the size differences between what's available and the size of the piston sleeve.
If you do it properly with an ER collet you will get gallons and gallons. If you use this clamp and end up with an egg shape sleeve probably not very long
Ya, I've seen them. Have you used one before? They look to me like they'd be to wide and crush to much of the sleeve? But I've never owned one before so not sure of the actual dimensions.
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the clamp he is using is called a high pressure bolted clamp and they only have them at ace hardware, I went to lowes and home depot and no luck, they were $8.99
Thanks. My 3.3 runs again...perfect for me as I only run it like 5 times a year.
Not a bad idea. I freaking love when people repair their own stuff instead of just going out and buying a part. This is a hobby and I also repair my own stuff. May I ask you if the chrome cracked any from the crimping? When I had to fix a piston to sleeve fit I was worried about crimping the chrome and having the chrome crack, so I did mine a different way. But yeah very cool man!! Way back many moons ago, I had a K&B .67ci Marine engine the one with the Zimmerman Reed valve induction. Anyways, I got the engine brand new and the engine lost compression when it was at running temp. What I did was I removed the piston from the con rod and found a perfect size socket, and heated up the piston and used a slug hammer and the socket to enlarge the top of the piston. After I knew I good fit I had to sand the top outer diameter of piston to smooth down any harsh 90 degree angles around the OD. basically I had to lap the piston to fit precise. That engine still runs today and strong 20 years running.
those collar clamps are very convenient to get another couple of races out of an old worn out engine. In my experience with them the repinch doesn't last very long, but maybe I'm not doing it right lol
ill repinch mines right at TDC where it really needs that seal!
I bought the tool for $13 for my .21. Nice video
What tool. An where did you get it ace hardware. ?
TRX3.3 engine. That's 3.3cc, which translates to something like a .19 engine when expressed in cubic inches. The older .19 engines such as the O.S. .19 or the K&B .19 RC used a piston ring on the piston instead of a lapped aluminum piston. Ringed engines can be restored to running compression by replacing the ring and lapping the sleeve a little. Cheaper than replacing the cylinder sleeve and piston on a Traxxas 3.3. lapped aluminum pistons running in a chromed brass sleeve (ABC) are cheap to manufacture but they don't seem to last as long as a ringed engine.
Awesome educational video brother 🎉🎉 if a sleeve has been bent slightly can it be reworked?
very cool idea, dont know how ive never heard of this.
Good idea. What's the clamp called? Can we get this in the UK ?
I got the tubing and have cut it to size and my clamp is supposed to come in around next week. Seeing how these clamps are pretty much exactly the same as the actual tools used for repinching (they’re a little bit thicker but that’s where the copper tube comes in so the pinch doesn’t go too far down), I don’t see how this won’t work. I’ll give an update after the process and probably make a video of the whole procedure since none of the known, trusted people who have a repinch service don’t show the process. It makes sense though. If they showed their method, they’d lose business because people know for a fact that that method works.
Update: it works very very well. I’ll upload a video on my other channel on the whole process sometime
Did you do it on a 3.3 or 2.5?
@@gotnitro4329 I’ve used it for several .21 race engines and used a 3/4” clamp for .12 engines. Works great. I recommend using a one piece clamp instead of the two piece like in the video. The one piece doesn’t pinch quite as tight, but it’s more even so the engine re-break in is easier and it runs more consistent
@@ashermorales8276 I’m trying to do this on a Traxxas 2.5 any suggestions
@@gotnitro4329 I have a video on a different channel called MoralesRC Designs thats a pretty in-depth tutorial on how to do it. Just follow the tutorial but with a 3/4” Bore/Inner Diameter clamp instead of 7/8”. If you need to resize a 3.3, then you’d use a 7/8”
@@ashermorales8276 dude thanks a bunch I’m gunna go to ace hardware tomarrow
Can the same thing be done to big block nitro engine ??
What would you call that thing yoir using to pinch he sleve?
you guys maybe we can use this pipe criping tool as well i think we could very carefully?? no?
Interesting video.
Great video! I was wondering why is it back if the temps on the motor get high for instance if the motor reaches 350 why is it bad? WOULD the sleeve need a repinch if it happened? I brought motors over 350 and nothing ever happened so why does everyone check temps for? Is it a long time thing
Heat causes things to expand especially metal.. Which cause loss of compression. Over time it really wears out your engine running to hot. The fix is to re pinch the sleeve. You will notice your engine does not idle properly or loss of power or after a few minutes you have stalling issues. This is signs of worn sleeve. Some engines definitely don't have these issues as often as others. For instance my OS 18cvr I've never had to pinch. Its a amazing engine. Where as my HPI engines I've had issues with in the past.
Montreal Audio systems , old mate is right heat expands things. There's more however, too much heat 350 ect will cause things to expand so much that sometimes the metal loses plasticity from being both stretched beyond its plastic point where it would shrink back to normal and just being too hot even weakening the strength of the metals. heat like that tends to change the way the metal is structured all the way down to how the metals grains line up and or stick together, just like a blacksmith "hardening" knifes or "softening" metal to be worked by using different temps and cooling. Also there's a few different metals in an engine, eg piston vs sleeve. One of them will expand more than the other. . . 200 deg might be OK theres not much difference in expansion or at least not enough to matter, maybe even just enough to help( actually the case) but more heat will make this gap much wider to where your sleeve expands so much more than your piston that the piston can wobble its top and bottom within the sleeve as apposed to the sleeve keeping the piston snug and straight. Hope this helps, at the end of the day the hotter metal gets the closer it gets to "melted" so to speak, melted means soft. Good luck!
Yep my motor is finished I'll need to get one of those clamp tools. Whats it called any one got a link?
Cool. What size nitro engine is being pinched with a 3/4 ID?
I couldn't watch piston/sleeve much as I was concentrating on them short thumbnails. Are your fingernails the same?
What is the actual name of the tool used? I can't find it anywhere.
Maybe I missed it but why 5.5mm?
What would I need to do different to do this to a 2.5
hey mate great vid wher can i buy a piston sleeve pincher for 21 engine
I pinched it too tight. How do i open sleeve bigger? Heated it pushed in piston let coo lbut wont open up
hi mate what the name of the clamp, im in Australia and having trouble finding them, cheers Graham
Same here for NL
Collar clamp
@@djeagleman cheers I found them, but thx getting back to me
Did it work for you? Im thinking about trying it
@@djeagleman I have not try yet..I get around to it one-day
Have you got a link for that tool please
Great advice! I have a couple .15 engines I'de like to do this to. You happen to know if the 7/8" clamp would work with them by chance?
no the .15 is a smaller diameter. There are guys on ebay now selling piston pinchers. They've already done the research to figure out what size you'll need. Other wise you could try ace hardware.Just bring your sleeve with you so you can try to match something up.
Okay, thanks for the response. I thought I had seen those sleeve pinching tools for .15 engines on eBay not long ago, now I'm only able to find the clamps for the larger displacement engines. Guess I'll keep looking, or like you said, bring my piston/sleeve to the hardware store and try matching one up. My hopes aren't very high that the hardware store will have one in that size though(guessing they'll only have sizes in 1/4" Increments, maybe 5/8"?)'
Anyways, great video man! I'd definitely be interested in an update video on this subject if you have any new information/tips/precautions' to add to the first video, that is if you'd be willing of course😉.
One of my suggestions would be don't crank it all the way down right away, due it in small increments and check how tight it is. It can get really tight and its very difficult to turn over if you over due it. You will have to heat the heat sink with a torch to bring up engine temps to expand the cylinder to turn it over and start it.
What is the clamp tool called?
Good job but from where to get this clump
I bought everything at my local hardware store
please respond you i really need all your feedback as this hobby should be for anyone not just people who can drop a hundred bucks every time you loose compression you know what i mean?
Does the con rod stretch then as the pinch wears out
No. Conrod stretches under heat and rpm, nothing to do with engine wear
what is the actual name of the tool so we have an idea when looking for it?
The video gives you a list of all the parts needed and where to get them. The heading of this video gives you a name. Piston sleeve Pincher. Hope this helps answer your question.
Collar clamp
If you going to buy one get an ER collet
Thanks for the video man. One question please are you using the copper pipe piece because you couldn't find a smaller clamp? Or do you need it for the correct way to pinch?
Couldn't find a smaller clamp.
@@mogyver69 I can find from AliExpress . They sell 5/8, 1/2, 3/4, 7/8, 3/8, 1/4 and 1" but witch one is better in your opinion?
@@subsonicreviews1835 Its great that your trying to advertise for that company but if you watch the video you will see I'm using standard sizes now. You need the copper piece to make up the size differences between what's available and the size of the piston sleeve.
How much runtime do you actually get from a pinched liner versus a new virgin liner?
If you lucky one time, what a waste of time
If you do it properly with an ER collet you will get gallons and gallons. If you use this clamp and end up with an egg shape sleeve probably not very long
Haha. Snake oil, my friend.
@@michaelinzitari - um... yeah... NO.
Whats that clamp tool called?
nice thanks man 🤔🤔
What made you cut it to 5.5mm the copper ring?
Regular saw with metal blade
Is there any specific reason why u cut it to 5.5mm instead of say 6mm
@@vwbeetle5578 cause the pincher is so thick but you can make it as long as you want in theory
have you ever done a 2.5 engine like that
Yes, with ER collet, not this rubbish
Just saying eBay sells sleeve pitcher just check there sleeve size description 20$. I think took me 3 week delivery.
Ya, I've seen them. Have you used one before? They look to me like they'd be to wide and crush to much of the sleeve? But I've never owned one before so not sure of the actual dimensions.
Used one years ago... as long as you're careful.....no problems
just wondering if you have run this piston/sleeve after resizing?
Yes, Of course. I had to go thru the break in period as if it was new again. Worked great.
How long did it last before a re pinch
Smart!! Ty
Collar clamp
Great way to ruin a sleeve. The proper way to resize a sleeve "pinch" is to use a tapered die with heat.
What made you cut it to 5.5mm the copper ring?