Świetny pokaz naprawy głowicy. Szczegółowo, nie ukrywając szczegółów. Ogromnie przydatny. Przekazano wiedzę, której trudno znaleźć w książkach. Ten film to rodzynek !!! Nie spotkałem takich nigdy. Podziwiam, pozdrawiam i dziękuję.
The precision tool for measuring valve seat counter bore diameters is excellent. Never realized such a tool existed and figured you'd just use verniers.
Nice video, thank you. Your tools make me envious. I have a flow bench and you were in a great place to improve the flow simply by boring the valve insert seat to .9 diamanté's of the valve and then do a back cut on the valve seat. That would give you a bigger flow gain than porting the head. cheers and nice tools.
@@muushkin Most people when porting a 4 stroke head focus on the port and narrowing the boss around the guide. but the biggest flow improvement comes from the valve seat area. Measure the valve OD diameter then bore in past the insert about 5mm exactly 0.9 of that valve diameter OD and blend into the port with grinder. Then cut the 45 degree seats and use the 30 deg top cut to position the head valve seat where you want on the valve. Then a very important step is to back cut or grind the inlet valve to 30 deg from the 45 deg seat edge towards the stem so that the valve ends up with 3 angles and the inlet seat seat ends up with 3 angles. Clear as mud I bet😁. Flows like a stream train 👍
@@mikerieck306 Small world Mike lol. I linked into your dyno Vid, impressive stuff, it sounds really quick in the higher RPM, kept the dyno operator reflexes on the ball.
I enjoyed the video and the presentation it was excellent. Not sure how accurate the machine can hold a concentric tolerance. The most important critical thing is valve seat to valve guide concentricity. What tolerance are you able to get the seat and guide to? Otherwise known as valve seat run out. Do you measure it after cutting the valve seat? There is a measuring tool that fits into the valve guide and places a finger clock DTI on valve seat and you rotate it to measure if the valve guide is concentric to the valve seat.
Valve seat concentricity can never be better than the concentricity between the valve guide and the cutter arbour. If the guide hole is worn oval, then it is better to replace the guide, and start afresh. Expensive head machines use compressed air to create a self centering effect between the tool arbour and the valve guide. When cutting starts, the tool and the work "define their own centres", and the concentricity is produced automatically. (Allowing for clearances) It isn't overwhelmingly critical, unless the parts are grossly miss-aligned, because the two working faces are conical, and tend to self align, at the expense of a little extra friction and possible valve stem and guide wear. If the oil seal on the guide is good, then you wouldn't even notice, especially on a generator.
Hi Paul excellent work as usual but could you show us in a future video how the boring head machines the counterbore at the bottom of the hole your boring. Cheers
Хорошо бы перед таким серьезным ремонтом заменить направляющую втулку клапана, что бы базирование пилоты было более точным, и полностью восстановить ресурс сопряженных пар трения.
Just love your videos! Clear to see the damage due to heat. Any background information on the rest of the engine? I guess honda did not intend something like that to happen. Is it sure it won't happen again after the repair? What was done wrong for that to happen?
I have done hundreds n hundreds of these trx heads guides also shift get loose A easier way of removing seat is to shrink it with weld basically falls out i use to use kerzan valve inserts kz3819 they are extra thinker than the average seat insert the valve height out the back is 37-37.5mm from spring bass to valve tip i also make oversized guides
It's not about saving the head, is about the skills, the dedication, the passion of creativity, now here in America you can buy new for a cheaper price than the labor, but theres many countries that relies on fixing it because the ability of finding the part as fast as possible, lots of money could be lost in 3 days because of a engine broke down in a mass production line against a few hours on a local machine shop, FANTASTIC JOB
great pro work mister your video is very educational, i did replace valve seats on a honda xr 250 work done by a local workshop is a few weeks the seats were deformaτed by the valve stroke on them,,,, where are you located? many thanks in advance peter
I use PC air duster to freeze parts. Costs less than half of those "freeze sprays" and does the same thing. Just hold the can upside down so the liquid comes out.
Talent work. Spary cooling liquid before insert seat is a very good idea. Can we use this for " brake cleaner " contact cleaner " or petrol?? What is ur idea??
What did you use for Valve Seat Material? Last time I did this it was mild steel. But I think commercial ones are cast iron. The one difference in making the seat was I ran a file over the od. to cause a slight taper, larger at the base. I then put the seat in the freezer or used dry ice and the head in the oven at 300 degrees for an hour.
@@PaulXchannel good to know it doesn’t necessarily mean it’s not right. Thanks for the reply. I just discovered your channel and love it, binge watching right now!
Nice video a lot of hard work involved for sure, besides the thermo locking of the valve seat to the cylinder head, did it also require any form of liquid sealing to ensure 100% valve seat seal? thank you
OLÁ. 26/12/23. Completando... a ferramenta utilizada é ÓTIMA mas faltou o acabamento final que indica a área de vedação que se tiver invertida poderá em muitos motores provocar a "flutuação de válvulas" que as vezes é confundida por "corte devido a rotação excessiva. ABRAÇOS...Roberto Udo Krapf
Świetny pokaz naprawy głowicy. Szczegółowo, nie ukrywając szczegółów. Ogromnie przydatny. Przekazano wiedzę, której trudno znaleźć w książkach. Ten film to rodzynek !!! Nie spotkałem takich nigdy. Podziwiam, pozdrawiam i dziękuję.
Great video no worthless chit chat just a good job being done in an expert manner . Great tools and equipment .
th-cam.com/video/uOk5L8Q__as/w-d-xo.html valve seat ring removers
man.., I love this kind of stuff. that was awesome.., instead of buying a new head, you totally fixed the old one like a Road Warrior.
you have a tool for everything. that's heaven for me.
Wish we had someone as talented as you and your machines around here. I need valves cut right now lol
A great demonstration clip with profound wisdom that really pays off. Thanks Paul !
The precision tool for measuring valve seat counter bore diameters is excellent. Never realized such a tool existed and figured you'd just use verniers.
Nice video, thank you. Your tools make me envious. I have a flow bench and you were in a great place to improve the flow simply by boring the valve insert seat to .9 diamanté's of the valve and then do a back cut on the valve seat. That would give you a bigger flow gain than porting the head.
cheers and nice tools.
Do you mean a thinner valve seat? (Smaller inside diameter?) and then adding chamfer on backside of seat towards valve guide?
@@muushkin Most people when porting a 4 stroke head focus on the port and narrowing the boss around the guide. but the biggest flow improvement comes from the valve seat area. Measure the valve OD diameter then bore in past the insert about 5mm exactly 0.9 of that valve diameter OD and blend into the port with grinder. Then cut the 45 degree seats and use the 30 deg top cut to position the head valve seat where you want on the valve. Then a very important step is to back cut or grind the inlet valve to 30 deg from the 45 deg seat edge towards the stem so that the valve ends up with 3 angles and the inlet seat seat ends up with 3 angles. Clear as mud I bet😁. Flows like a stream train 👍
@@markjohnson6130 I go .9 on the intake seat and .85 on the exhaust.
@@mikerieck306 Small world Mike lol. I linked into your dyno Vid, impressive stuff, it sounds really quick in the higher RPM, kept the dyno operator reflexes on the ball.
Attention to detail , same principal as a custom Chevy cylinder head . Nice job .
Really admire your professionalism in the equipment and tools you are doing the job.
Wish I had those equipment,
All those amazing, high end, expensive, precision tools... 😍
Инструмент и исполнение на высшем уровне ! Похожее имею. Одинаковый у нас с Вами только маркер !
I have never seen such a good work before
Greetings from Argentina. U are amazing.
Что скажешь, приятно смотреть,и есть к чему стремиться и учиться.
Как приятно смотреть когда работает мастер! Золотые руки! Best!
You are the type of people I don't mind paying to get work done for me
Great demo , cool Tools and a lotta Work ! thanks I felt like I just did a day in the shop:)
The best!!!!
I from Brazil
Love your work
I could watch this chit all day! Give me more please.
th-cam.com/video/CaVDrFYXqKs/w-d-xo.html
Tutorial yg sempurna hasil yg maksimal .ful support from indonesia 👍👍
Good and clean job.Try to pour some alcohol when you cutting the seat pocket at the head.you will have better wall surfaces.
I enjoyed the video and the presentation it was excellent. Not sure how accurate the machine can hold a concentric tolerance. The most important critical thing is valve seat to valve guide concentricity. What tolerance are you able to get the seat and guide to? Otherwise known as valve seat run out. Do you measure it after cutting the valve seat? There is a measuring tool that fits into the valve guide and places a finger clock DTI on valve seat and you rotate it to measure if the valve guide is concentric to the valve seat.
Valve seat concentricity can never be better than the concentricity between the valve guide and the cutter arbour. If the guide hole is worn oval, then it is better to replace the guide, and start afresh. Expensive head machines use compressed air to create a self centering effect between the tool arbour and the valve guide. When cutting starts, the tool and the work "define their own centres", and the concentricity is produced automatically. (Allowing for clearances)
It isn't overwhelmingly critical, unless the parts are grossly miss-aligned, because the two working faces are conical, and tend to self align, at the expense of a little extra friction and possible valve stem and guide wear. If the oil seal on the guide is good, then you wouldn't even notice, especially on a generator.
That was some outstanding filming. Thanks
Hi Paul excellent work as usual but could you show us in a future video how the boring head machines the counterbore at the bottom of the hole your boring. Cheers
great technique, and great tools công😄👍
Very precise repair with the use of perfect tools. Another congratulations 👌.
Thank you 😀.
Хорошо бы перед таким серьезным ремонтом заменить направляющую втулку клапана, что бы базирование пилоты было более точным, и полностью восстановить ресурс сопряженных пар трения.
Wow, so much tools and time to repair one damaged valve seat.
Could you please indicate at wich temperature you need to heat the head and what is the (very impressive) refrigerant spray ?
Como siempre da gusto verte trabajar, buen video.
O cara é muito profissional.
beautiful work hug from portugal
What grade steel did you use for the new seat? Great video.
42crmo4+qt
Very ASMR and funny edit. You might want to tag that in the vid to get more views. 👌
How much this item cost brother?
Fantastic vídeo!
A big hug from Brasil.
Showed a great work with the hardest things
watched the video thoroughly and enjoy it thought you deserved a comment, just out of curiosity how do you perform leak test ?
Just love your videos!
Clear to see the damage due to heat. Any background information on the rest of the engine?
I guess honda did not intend something like that to happen. Is it sure it won't happen again after the repair? What was done wrong for that to happen?
Thanks.
Excessive engine overheating in the field - logging.
@@PaulXchannel Makes sense, thank you 🤓
Outstanding work man well done
Very precise work, skilled person with precision tools
I have done hundreds n hundreds of these trx heads guides also shift get loose
A easier way of removing seat is to shrink it with weld basically falls out i use to use kerzan valve inserts kz3819 they are extra thinker than the average seat insert the valve height out the back is 37-37.5mm from spring bass to valve tip i also make oversized guides
👍
It's not about saving the head, is about the skills, the dedication, the passion of creativity, now here in America you can buy new for a cheaper price than the labor, but theres many countries that relies on fixing it because the ability of finding the part as fast as possible, lots of money could be lost in 3 days because of a engine broke down in a mass production line against a few hours on a local machine shop, FANTASTIC JOB
Finally someone not using center drill in the lathe, because they are not putting in a center.
Excellent demo, fully explained.Procedure is cute .Keep on.
Awesome work! So relaxing to watch...
I keep listening to how you work on a machine.
Well done.👍🏼
Nice video paul👍. Just suggestion for next video how to change big valve for cylinder head. Thx
I bet I coudn't find a machine shop in my country that could do this job.. thanks for sharing. Now I know that job is possible
Excellent work! What temperature do you heat the cylinder head to when fitting the seat insert?
Thank you.
a drop of water on a hot cylinder head must evaporate immediately
@@PaulXchannel Thank you
Complimenti per l'attrezzeria a tua disposizione 👍
great pro work mister your video is very educational, i did replace valve seats on a honda xr 250 work done by a local workshop is a few weeks the seats were deformaτed by the valve stroke on them,,,, where are you located?
many thanks in advance peter
Good replacement and precision tools and carefull measurement but i see some sharp edges above the seats carbon deposit might build up there
Waww amazing very very précision work very nice thanks 😊
this was the coolest ish ive ever seen - how does one even learn this :D
th-cam.com/video/VsLaRlDAMF8/w-d-xo.html
I use PC air duster to freeze parts. Costs less than half of those "freeze sprays" and does the same thing. Just hold the can upside down so the liquid comes out.
Talent work. Spary cooling liquid before insert seat is a very good idea. Can we use this for " brake cleaner " contact cleaner " or petrol?? What is ur idea??
Amazing machining skills, but I'd like to know the cost difference of you repairing the cylinder head versus just buying a new cylinder head? :-)
Wow simple tools
No huge milling machines
What material is used for the seat , you have some lovely tools. I still lap by hand too get a perfect seal
excellent work ethic to detail,marvelous,done right is everything
really superb.welldone.greating from india.
What kind of press fit do you use on your seats in a 4 valve head (TRX450)?
very relaxing to watch, informative too
What did you use for Valve Seat Material? Last time I did this it was mild steel. But I think commercial ones are cast iron. The one difference in making the seat was I ran a file over the od. to cause a slight taper, larger at the base. I then put the seat in the freezer or used dry ice and the head in the oven at 300 degrees for an hour.
In description
Отличный ремонт!
WOW..... Pure Art again... i love your videos !!!!!!!!!!
Damn, those valve cutters are far better than the India ones you tried out...
Amazing stuff, and what a clean job. Best whishes.
This will be useful for my next build!
Is that a hair line crack between the seats? The oversize seat will make the crack larger.
Time ?
You have some mad skills in the machine shop!!! Very nice work and can't wait to see some more! :)
Isn’t the intake valve bouncing (at the end) a sign of it not seating perfect? Nice job by the way and love the video.
the pressure test showed that it was okay
@@PaulXchannel good to know it doesn’t necessarily mean it’s not right. Thanks for the reply. I just discovered your channel and love it, binge watching right now!
Nice video, a pleasure to watch.
Super vidéo avec quel matière les sièges de soupapes sont refaits ?
These are tools of my dreams!! 🤤
back in day i did in my mopeds-moto cross bikes & cars, in old 80''s hand tool a bigger valve seat.
Profissional de mão cheia. Parabéns muito bom seu conteúdo. 👏👏👏👏
Genuine work very nice 👍
I wasn't confused until he mentioned an overlap of 0.1 mm. I watched that far in the video and finally noticed he was using metric.
Do these bikes still not use hardened seats? I know cars do because of the unleaded gas and other modern fuel tech.
What is the valve seat material?
Cast iron
А стружка как у стали
Don't the valve seat inserts have to be hardened? As far as I know, this is the case with engines that run on unleaded petrol. Still great repair.
The material for the valve seat is hardened in advance.
@@PaulXchannel OK ;-)
Nice work!
I have not seen any reference anywhere for the use of 42CrMo4+QT as a valve seat material. Can anyone add to this? @Paul x ?
Интересно, металл имеет нужную термообработку. А то кажется сделано из сырого куска металла.
why was the old seat look magnetize when machining it
😳master, teach me thine way😳
I wish I had a small shop & all the toys to do rebuilds. Where are you located, do you fix other dirt bikers nightmares?
Well thank you.
I do not provide this service publicly.
13:41 left side down... split?
Can you tell us where to buy some of those tools like the center tool with bubble?
th-cam.com/video/zY06Wsq1-Y8/w-d-xo.html
th-cam.com/video/Y_RHNBqIByw/w-d-xo.html
Nice video a lot of hard work involved for sure, besides the thermo locking of the valve seat to the cylinder head, did it also require any form of liquid sealing to ensure 100% valve seat seal? thank you
Thanks .
Just fire and ice :)
Super high precision instruments.
Nice presentation thanks 🙏 👍
Is the tool in 3:56 minutes called valve checking pressure? Anyone knows?
Good job ,cool diy mashine :)
Наверное дешевле головку купить....чем за такую работу мастеру платить....
Beautiful work.
OLÁ. 26/12/23. Completando... a ferramenta utilizada é ÓTIMA mas faltou o acabamento final que indica a área de vedação que se tiver invertida poderá em muitos motores provocar a "flutuação de válvulas" que as vezes é confundida por "corte devido a rotação excessiva. ABRAÇOS...Roberto Udo Krapf
Profesionální práce, nádhera.
What a patience consuming process
Perfetto come sempre, bravo Paul x
What kind of tool post is that on your lathe?