The OEM parts are made by; extruding rubber compond to form the inner tube at a smaller internal diameter than finished, then a loose braid reinforcement is woven over that, and then an outer tube layer is extruded over the inner/mesh. This is uncured rubber compound. This raw tube can be made in km lengths in a co-extrusion production run. It's stinkin ch!t to work with. The straight raw tube is cut to length to suit the component. It is closed into a metal clam shell mold form of the exact size. The tube is plugged and pressure inflated to form the unkinked inner and outer shape form. The inflated tube mold is then heat cured in an autoclave some time, cooled, then the clam shell mold opened. The rubber compound is thermosetting. Once heat cured it cannot be remolded or reshaped. Because the inner tube is smaller and the textile reo is loose and can slip between the outer there is NO tension in the reinforcement trying to resist the hard set bends, the finished product will always retain the shape... in fact resist deformation, just like the straight tube. Thats the problem with this method - the reinforcement mesh embedded in the tube resist tension loading, bending and pressure deformation. The rubber resists stretch and compression when bending, so it fights to retain the shape it was when cured - straight. The better choice of tube would be reinforced PVC because it is a thermo-forming compound, rather than a thermo-setting compound... and so, heated enough, inflated and molded then cooled there will be more chance of having the reo textile comfortably shift within the easily formed plastic. Remember, you can put the bending spring around the outside of the tube when forming plastic, but air pressure is needed to inflate for no kinks.

Thank you so much. Great job. This is what you tube is all about. Not the ad's .

This is one of the best tips I have seen in a long time. Tumbs up!

Just a point to make those pipe bending springs are used to bend copper pipe and fit on the outside of the pipe… that ones that go inside the pipe have a loop that that’s attached to a cord to be able to pull back out after bending 👍🏼good video buddy

I recognize your accent. My grandfather in Poland use to feel pipes, hoses e.t.c. with fine sand. With both ends plugged he could bend stuff in any shape without kinks or diameter reduction on corners.

You can also put the rubber hose in boiling water with springs inside and bent to your shape with zip ties holding it in place, then put under cold water to set it. no need to wait for 2 hours.

Really good vid! Thanks for the wonderful video, and a huge thanks for not ruining it with crappy background music. I don't know why some people feel compelled to add annoying background music throughout their videos.

Great video. If you cannot find the correct spring size, I have used fine sand packed in

I am an auto technician and I have considered this a couple times, wasn't sure of the best method. My grandmother had a car that had a small bypass hose that costed an inordinate amount of money for what is essentially a tube... So at the time I just made an enormous loop to avoid a kink. It worked perfectly and truly ironically I bought several feet of hose for less than the cost of the molded hose.

This is a great tip for making obsolete or hard to find hoses.

Somebody buy this man some new gloves! Great video

Hey! In industrial hose making you make a metal form to the exact shape you want and then put a flexible hose over the form and stick the whole thing in an oven to bake.

That video is exactly why I watch KZfaq excellent. subbed on this video

Ok. I don't know the "butter" temperature one would need, but I have conjured up some tweaks for your mousetrap that may result in a smoother more uniform part using the same materials. -make a jig on the bench -stuff hose full of sand and tamp it down -bury hose in a box of sand -heat in oven at (magic) temp for (enough) minutes -pluck hose place in jig (leaving sand inside) -maybe dump hot sand on it -let it cool overnight There! I just wrote your next script! (btw, thank you BTW, for explaining how the real thing is done. Love to learn.) Thanks, mans!

I have used these springs for bending brass mainly, it never occurred to me to try this. 👍👍

Sir. You are the type of person that should be making a comfortable living from making KZfaq content. Original. Helpful. Well done video. Thank you

Thanks for that little spring and applied heat demon station to the rubber hoses. I have found that if you just apply a little heat to where the inside of the bend will be for you bend it. Then continue applying heat after the hose is bent the heat will be more consistent around the rubber making the hose except the bend better. Thanks again.

This is a great video about something useful. So much better than so many things on KZfaq. I’ll subscribe! Good fortune on your channel!

Brilliant video brother. Greetings from New Zealand.

I am impressed. You sir are an example to be followed. Thank you very much.

Kudos to you Sir !

Rubber cuts clean and very easy when you wet the material and knife with water.

I prefer boiling water , but its really only good for fresh builds as its a slow process, but works BEAUTIFULLY! Another tip, even if not benfding forming, use the heat gun to heat ends brfore slipping over pipe nipple. then clamp when warm, NOT hot or it will sqweeze out the hose too much. Best wishes,I built diesel power units for awhile, and did this all day long. You get tough hands doing this, those big 3" inch suction hoses are a beast to form!

I've done this for subtle changes without the mandrel. It's a great idea. Heat also helps with tight hose to nipple fit.

I like this tip. Very useful. Thanks brother!

Plug one end of the hose. Fill hose with sand. Plug remaining end of hose. Heat and bend and secure the shape until it is cool. Open the ends and remove the sand. WASH THE HOSE OUT. Let dry and you are good to go.

Thank you. I always wondered how to create the custom bends for certain hoses. Great video.

This is certainly something I may try in the future if I am unable to find a replacement formed hose for one of my older vehicles. Thanks for sharing.

Great information and thank you for being honest about what went wrong and how to correct it.

Necessity is the mother of invention…. Great idea🤠👍

Great video man! Thank you I learned a lot from this video 👍🏼

Very good video. Boiling water also works wonders with rubber and plastic types of hosing.

Good idea. Especially the over bending to compensate for kinking when hot water in pipe. Gaz UK

Very good idea! Never would have thought of it. Thanks!

Great video, this will come in very handy in the future. Wished I knew this a few months ago when I replaced the PVC hose on our Lexus.

Excellent tip, im glad i watched

For the hose not to get kinky you can bend it to a wider angle and play with the length, most times placement allows you to do that so it solves the problem by not strictly following the factory curve. For example a U hose can be make it a little longer so it doesn't kink, for an L shape you can cut it shorter so to stretch the 90 degree angle and so on. I need to find those springs, there were a lot of times i needed this to build my hoses from straight ones cause i ended up modifying old ones or connect them with L joints etc.

Very cool video man. Saving this to my how-to playlist. Subscribed 👍🙏

Perfectly explained and illestrated.

Looks good.

Great work!

Awesome! Thanks! Great tutorial! 😊

Great video. I'd like to add my 2 cents. You can fill the hose with dry sand instead of using a spring. Sand works just as well.

Great info! Thank you😊

Great video my brother! I really learned from you - gonna use this method when I need a custom hose when none are available 😊

Another option is to use armored aircraft hoses. You can bend them most any which way without compromising strength, and they look cool too. I also needed a fuel filler hose for an old Jeep Cherokee that went from the filler assembly to the tank, and I couldn't find one until I went to the local Aircraft Fixed Base Operator, who had the size I needed in bulk. It wasn't armored, but it was rated for Avgas, and solved the problem. It came with supporting ridges for bending up to 160 degrees without collapsing, but my application was a straight shot, so that was overkill. Most any aircraft hydraulic shop can put the fittings on for you while you wait, if you need that as well. Not cheap, but it cost less than the driving around I did looking for a solution.

Awesome, and so simple. Great video.

Awesome video you've been a great help great job thanks 👍

Great tip. 👍👍

Excellent content. Applies to other disciplines as well. Thank you!

This is a great tip. You just earned another subscriber! 😉

Great tips!

Great technique to save money. Nice job. 😎

Excellent !

Парень точно с головой! Я получил отличный опыт.

excellent tip and great presentation. thanks man!

Thanks for the video. It is very informative!

Thanks for sharing your technique for shaping off the shelf hose to match OEM parts. I just need to purchase the K&S Engineering tools.

Thanks for the video!

I didn't know this. Thanks man.

You can possibly use the metal spring on the outside of hose, which will keep it from kinking, just cut spring to length, and buffer the cut end to prevent sharp cut from damaging hose

Brilliant! thanks for sharing

VERY COOL Thank you

Very cool!

I think you got your money's worth out of those gloves a long time ago. 😂

Very helpful, thank you

Great job! Salute from Cary

Excellent tip thank you.

Excellent, thanks

Great info, thanks for instructions, I wouldn't risk such on a new engine or rebuild, BUT a quick fix is OK

Great video!

good job

Great tip

Very interesting technique!

Great Idea

I like this!

I hope you enjoy your Rheem Water Heater as much as I do mine!

Tubing bender spring. This was intended for bending copper tubing to shape but this is another use.

Nice work

Thanks for the video, excellent guide and very useful. Another tip is to smear some washing up liquid on the rubber pipe before you cut it with your knife, slices like butter.😀

Cool video, learned some stuff for sure. I was using the same technique recently to flare a hose end so it could fit two different diameters. Had to oversize the object inside to what I needed so when removed it was correct. Similar to you saying it might need over bent. Used basically the same technique but cooled under water and it worked great.

Nice idea bro..frm philippines

Thanks COOP ...

hi, very slick!

*Thank you!*

handy tip. The best tip is at the end, to "overbend" the hose so it will settle to where you want

👍👍👍. Thank you

Good video, might need to try that. I just looped the hose like you did @ 10:39 to get the 90 degree angle, but had plenty of clearance for the loop.No heat needed if you have room.

Great video👍👍. Just subscribed. Thank you sir..

i like it!

I did something similar except I formed it then baked it in a cheap countertop oven I keep in the shop for heating non-food stuff. You can often find them in thrift shops. Give it a chance to become thoroughly heat soaked. The temperature I used was about 325 degrees for 20 or so minutes then let it cool gradually The hose has been holding up just fine without changing shape in use.

Thanks

amazing

I think a cable tie might be a good way to hold it rather than a hose clamp?

I always wondered why my old school radiator hoses have coiled wire in them, Now I know why thank you

Wow Imtiaz Ali also fixes cars! ❤

Great video. I knew about springs and I have a heat gun but these demos were helpful esp for an older car that needs new hoses. I would recommend shortening the video to 5 min or a little less. Lay out all the hoses, springs, heat gun etc on a brown piece of paper and name + price next to each one and video and say something like: "today I'm going to uses these tools to make straight hoses to look like this - bent hoses"....

Thks

Great idea, but more suitable for gradual curves rather than tight curves, thank you

Good tips , never seen those little spring-kits before . The tube would have less 'kink' if had been a little-shorter and able to straighten-out slightly once it heated-up . Dave nz