Do Your Own 3-Angle Valve Seats!

Ffs, just send it to a good machine shop and have the seat width, depth & angles finished properly. Honestly, we don't mind doing these jobs and it'll cost you MORE if you proceed to fuck it up and then ask us to fix it. Sheesh...

Great video bery well explained 👍

Excellent video on how to use the Neway cutter system..They're right down the road from me in Corunna Michigan..If you've got a problem, they are always willing to help..Great bunch of people..

Do I see a possible crack in that head?

When your done cutting, don"t forget to measure the seat to be within tolerance!

Usually a 3 angle valve job is done for performance, a single cut or 2 if seat is too wide is used in stock applications. You forgot to mention about seat width. The whole reason for a 3 angle valve job is to make the seat as small as possible and the other cuts is to make that width correct and to increase flow for performance. You had your valves reground, did you also have multiple angles cut on them to maximize airflow ? If spending that much to do seats I didn't see any porting done to the heads. I'd port them before doing seats as porting may damage seats and you would have to repeat doing them over again.

I thought the 30 and the 60 are used to move the contact area so you land in the middle of the 45 angle on the valve itself, you don't want the contact area too wide or too narrow and you don't want the contact area too high or too low on the valve face . The 30 and 60 let you move the contact area around and also let you adjust the width. I try for 2mm wide and the middle of the face

Dude! For the price of those carbide cutters to seat the valves, I can buy some pretty nice heads for $2,000.

Holy balls, are the combustion chambers rough on those heads. My ocd would have kicked in and I would have put in some junk valves and removed some of that before doing the valve job. I also use Neway cutters and they work great. I got a different handle to turn them as well as a cutter that cuts 90* to the combustion chamber to flatten the lip or burr caused by the oem valve cut.

A really cool process

Where do i find those toold

No spring under the cutter

On a Cast iron... 2 valve ...Briggs 'n Stratton engine ??

Thank you sir

well done video

wow thank you sir for your totorial, yes I can see with old school V8 heads your 3 angle valve job method would be no drama, like you said go slow and do it right.

Good tool but ghe seat is way too wide. A piece of carbon can get under it and hold the valve open causing it to burn up the valve. A narrow seat about 1/16th" will cut the carbon and send it out the exhaust.

have used those cutters & dont like them,if a machinist has good pilots & stone holder you will get a much mare accurate & better job.some say even better than using a serti machine

How did you decide on the 3 bit cutter vs the 5, was it just cost?

ShOcK & AWE... I haven't been this impressed since I stepped out of the shower dripping wet (sorry for that visual). Very COoL. I had not idea these tools exsisted. You RoCk! Cheers from So.CA.USA 3rd House On the Left

One word...editing

You have not checked your work. There is a tool called a valve seat concentricity tool that allows the machinist to check his work. the manafacturer has in the engine specs the maximum runout for any valve seat and that measurment is 2.5 thou. You also did not turn the pilot 90 degrees , in fact what condition are the valve guides in. What clearance are you running on the valve guide to valve stem as intake is different to exhaust. Best of luck tuning that engine.

Very good video and you did the valve job just right.

looks like harden exhaust seats were install before.

When I ran my shop i used to charge 5 bucks a port for a 3angle seat. I recently paid nearly 40. Times have changed!

Black magic marker works just as well

Just valve lapping would have worked. No need to cut seats

A Neway cutter kit is over $1000. A shop might cost $300. This is not a solution for any DIY

Excellent video thanks so much for posting. And I can't believe I am saying this, but, excellent comments from viewers too! No BS just actual valid discussion about valve cutting. Cheers from Canada!

Nice video!

Sounds like Bob Ross doing a valve😂 job

Excellent Video. Yes you can pay others to do it, but there's something to enjoy about doing these things yourself

Nicely done, thanks for sharing! Those look like some good tools!
I recognize a slant 6 head anywhere, lol

I have had valve jobs done by two different shops and after both cut the valves and seats the contact area was not acceptable. I also purchased these cutters and it does take time to properly cut the seats. I use new valves as they are cheep. I use an old valve to carefully lap the seat with fine compound just to clean up the seat of any very minor imperfections. I typically do not use the new replacement valve for lapping the seat (and yes its not really lapping) as if you over lap the valve it just screws up the valve face and if they are coated it can ruin the surface. Then I use the new valve with Dyekem to check the contact width. If I do lap with the new valve I use very fine compound. Its time consuming but I get it exactly what is specified.

HAHA DRILL GO BRRR

Awesome explanation ! I have the same set I’ve been using for many years, I love them…

Couldn't u use a new valve as a guide for the cutter. Would think it would line up perfectly with the guide. As long as the guides arent bad

Excellent

cutting 30° and 60° is for air transition but also to give the seat the just contact width with de valve. To large => valve pressure on the seat is reduce, leaks can appear. To low => pressure to high. I think !

wow, now i understand, thankyou

How much for 3 angle

Thank you!

I do SEVEN angle valve cuts on my motorcycle valves and seats. I learned from the late "Pops" Yoshimura. The 30% open flow is 50% GREATER, which is VERY important on my 1964 305 Honda SuperHawk twin two-valve engine. Yes, the flycutter cost nearly a thousand dollars and there is only one man in town I let use it-he also does the cylinder honing for me. He is an artist with the Sunnin honing machine. When he decides to retire, the lady that runs the machine shop says she'll probably close-up, because she can't get any young guys that will learn to do race engines and drag boat engines. REAL machinists are a dying breed, sadly. If you can install new bronze valve guides and ream them to fit the valve stems, you might have the makings of a machinist. Now when like my late Daddy, you can cut the taper for the pins that hold on the wings of a B-47 bomber (by hand!) you ARE a machinist! He also built the first and second stages of the Saturn V rocket booster for Rocketdyne. We ALL knew the astronauts PERSONALLY, so it wasn't "Just a job". I'm a klutz.

Great video ! While porting my DOVE heads for my 460 I slipped on the second to last port. I put a nice little nick on an exhaust valve seat. Hopefully I can clean the seat up with the cutter and save a ton of money. Its worth a try. All the machine shops in south central Texas are backed up for months. I been calling every where and seems to be 2-4 month wait to get the seat fixed. My 460 block has been at the engine shop for five months. I sent it to get bored .060 over, align honed, decked, new pistons and the whole thing balanced and short block assembled. Owner told me 8 to 10 months at least !

This is a great video! Thank you so much for making it. This will help immensely in the work on my old boat engine.

I have been reconditioning heads for almost fifty years using Rose cutters, stones and newway cutters although the set I used had 46 degree cutters and RVR machines. I would note that with some hardened seats it is a good idea to use some fine emery paper initially to remove the hardening as it can dull the cutters very quickly.

Why didn't you broach the gasket face yourself. Been doing my own at home for 40 years and I'm an auto machinest. Cnc machines ain't cheap

👏🏼👏🏼👏🏼👏🏼👏🏼👏🏼👏🏼👏🏼👏🏼

Hi my teacher I want ask if this valve seats cutter hard and give much work

innformativ ! Slowly and at all no stressing education ! Nice ! :-)