Valve angles

I am looking to comfirm some angles on the valves, valve seats and heads on a V6 225. Valve seat angles, I am getting 45 degrees, Valve shaft angle inside the is head is 10 degrees.

Can anyone confirm these angles, thanks a bunch.

 

I used to do valve jobs for a living (20 yrs ago).
The seat in the head should have 3 basic angles. Basically the 3 angles are 60 degree, 45 degree (for the valve to seat on), and 30 degree. The 30 and 60 degree angles are used to get the 45 degree seat (in the head) in the proper position on the valve face. The valve face itself usually has a 44 degree surface.
Sometimes just looking at the valve seat in the head, it is hard to make out the 45 degree angle.
For a long lasting valve job, you don't want full pattern on the valve face itself. You want just about a .010 wide pattern around the face, in the center, because as the seat wears down, the patten on the valve face will get larger over time. I hope this makes sense.

 

A good way to tell what condition your valves are in (with the head off) is to put some valve lapping compound on the valve face (where it touches the seat) and put some oil on the shaft put the valve in the head. next put the valve in an electric drill turn the valve slowly (barely turning) and lightly touch the valve to the seat. Pull the valve out of the head and wipe the lapping compound off. If you see a nice thin ring around the valve face they are probably good. If it is wide they probably need ground. If the ring is wide on one side and thin on the other it is bent slightly. The ring should be near the center of the face.

I probably didn't describe this well enough.
Me and my dad have been checking heads this way for years.

 

Thanks
I think I have it. 44 degrees on the valves ... 45 on the head ... check the seat with lapping compound and a drill.
I have rust pitting in 4 valves. The others look OK.
Any grit level prefered on the lapping compound 280, 320 or there abouts?

 

You'll want to have the rust pitted valves refaced. A good way to check the seal of the valves (installed with springs) is to put solvent into the ports, and look for signs of seepage on the combustion chamber side.

 

I use permatex valve lapping compound. I don't have a clue what grit it has.
The contact area on the valve face should be no wider than a Quarter (.25 Cents) is thick. The exhaust side is more critical than the intake.

 

Thanks for the help all, head machining and valve grinding done, elbow grease is all thats left.