Why I hit seat with stones! 

Mannn I’ve been doing this for the past year at my shop, I’m glad to see someone else doing this honestly. I’m 22 & have been working at a machine shop for going on 4 years. I haven’t put a runout gauge on it like you did but I always noticed that it made the vacuum gauge reach max quicker. Sometimes my boss is like “wtf are you doing” haha but I do it whether I’m doing a valve job with stones or on the guide machine with a cutter. The way I look it especially when people say “oh well when the head is torqued or, when it gets heat in it” I think that’s all the more reason it should be done. It also saves a lot of money in stones because you’re only spinning it by hand and not putting much load rpm on it. I just use it to basically polish & true up the seat, it also gets rid of any chatter marks especially on nickle chrome seats or other harder seat alloys. I may not have dozens of years of experience doing this kind of stuff but I can see with my experience so far of machining/working on cylinder heads on almost every day in the past few years that there’s no reason not to do this.

Good Tech Chad. I always belived in grinding seats. Nice finish process for sure. The Sioux is the best, in my opinion. Thanks for sharing. Have a great day. 👍

Ground and lapped is the only way to go! I still have an old Black & Decker valve seat gringer.

great info,,,thanks

I use the Sioux stones and holders with water cooling, i get mirror finish on the seat and stones last longer. I worked as a teen in a factory that made engines, all their seats were finished with a grinding process.

Nice runout gauge, I have some of Ricardo's other tools, very high quality :)

Smart man, just because you don’t hear or see chatter doesn’t mean there aren’t little imperfections from the carbide cutter.

Awesome Chad! I've never seen one before. I'm shure my friend that owns a machine shop wil be watching this video. Thanks

Very nice demo. I wondered what your procedure was, turns out my first employer in this industry showed me the same procedure in the early 90's.

Thanks for sharing this video with us

Nothing cuts valve seats more accurately as A Sioux BB1702 Ball Bearing Holder and Stones. Argued with many but I know Likewise Chad.

So seems funny that many won't use a stone on seats because they think the abrasive embeds in the seat and ruins a valve job...but they're more than happy to use a stone hone in a valve guide....

Great video !!

Nice. In Stock and Super Stock (and other classes) you can tell by how far under the index you are, whether, or not, the engine makes power. If you are 1.00 under, that's good, if you are, .100 under, that's bad. LOL!

The valve will still seat but it bends the valve , wears the guide and possible valve head drop.

👍

Pull out the arbor and reinsert it, will your .0005" will be back?

nice!

Do they still make those runout gauges?

Yes it’s a Bunch of BS torque the head down the seats change shape and then flow water threw it at 160 deg 😳

👍🏻