Concentricity in Valves & Seats

Concentricity is essential in cylinder head work. Today's Tech Lab Tuesday episode concentrates on how to measure concentricity in valves and in seats.
View the Products used in this video at Goodson.com
Valve Concentricity Gauge (VCG-16) | goodson.com/pr...
Premium Valve Seat Run-Out Gauges (VSG-375, VSG-385) | goodson.com/pr...
Precision Valve Seat Run-Out Gauge (SCG-375) | goodson.com/pr...

[@cycletechperformance9581]

Thanks Dave!

[@mr.french4602]

Dave what runout tolerances do you allow for? for example .001" for every inch in valve diameter? Of course 0 would be ideal but I have found it hard to get that every time.

[@GoodsonShopSupplies]

Hi Mr. French,
Dave retired at the end of 2021 so he's not in the office every day, but he stops in from time to time. I'll get this question forwarded to him and encourage him to check our your question and get you a response.

[@GoodsonShopSupplies]

regardless of head diameter you need to be .001" or better on each and every valve you grind. Now that being said, you can open that spec according to whether it be a everyday driver or race engine. However I always state .001" or better.

[@khizerhusain5237]

Sir good evening
Sir how we measures valve seat angles such as 30,45,60 degree kindly tell me

[@Eglehalo4]

How is no one talking about the biggest valve I’ve ever seen

[@GoodsonShopSupplies]

Thought you'd like to know that this valve came to us from a sea ferry out in Washington state.

[@TheDriveByGuys]

@@GoodsonShopSupplies I'm running those same valves in my civic, just had tip 2.2 feet off the valves to stem height them correct