another Snow engine

[Don1966]

Cool Achim, I Don't think the valve will stay close that long when running. Nice work.........

 
Don

[Kim]

Very cool, Achim!  I've heard people talk about checking their valves like this, but never really knew how it was done. That's fascinating! Thanks for sharing it.

Kim

[fumopuc]

Vince, Simon, Roger, Don and Kim, thanks for your input.
I will start to machine the valve seats into the inlet valve cages today.

[fumopuc]

Achim,
I noticed you were using a, I presume, 90 degree countersink for making the valve seat. How did that work and what was the resulting valve seat surface quality? did the surface require or will require additional treatment i.e. grinding / lapping to be acceptable?

Peter J.

Hi Peter, today I can answer your question after getting some experience with the inlet valves.
I have finished all inlet valve cages with soldered flanges and did the vacuum test. I have been supervised by myself, but all 4 inlet valves kept the vacuum for 20 seconds or more without any further treatment. So I am very happy with this result, hopefully I can repeat this with the outlet valves and valve cages.


Today I have done the threads at the inlet flanges for the inlet manifold also. M 1.6 mm, not my favourite job, because I always kept my breath during cutting and getting a read head. At the last picture we have a M 1.6 mm bolt and a M 3 mm stud very close together, the stud seams to be huge.

[Dave Otto]

Very nice Achim, I always enjoy seeing progress on this project.

Dave

[zeeprogrammer]

Love those last two pics. Spent some time on them.

Really really nice work. It's a show piece.

[fumopuc]

Dave, Carl thanks for checking in and the friendly comments.

[Kim]

Beautiful work, as always Achim!
Still following along and enjoying your build!   
Kim

[Roger B]

Coming along well    I also get a little nervous with anything less than M2 

[gbritnell]

Hi Achim,
Quite a masterpiece! The smallest fasteners I have used were 1.0x.25. When tapping I use a very small chuck to hold the taps. That way I can feel how much side pressure I'm putting on the tap.
gbritnell

[Captain Jerry]

Hi Achim,
Quite a masterpiece! The smallest fasteners I have used were 1.0x.25. When tapping I use a very small chuck to hold the taps. That way I can feel how much side pressure I'm putting on the tap.
gbritnell

That is good to know.  I have often used a small hand held chuck for tapping small thread but I was ashamed to say so for fear of ridicule.  It just seems like an amateurish method.  Now I can hold my head high.

Jerry

[fumopuc]

Kim, Roger, George, Jerry thanks for checking in and the friendly words, I appreciate it very much.


For any kind of thread cutting I am using this little stand, made from a normal drill stand.
Not real high tec but functional.

[Don1966]

Lovely work Achim enjoy following you........

Don

[V 45]

Looking VERY nice indeed !! I like the transformed drill press !!

[fumopuc]

Don, V45 thanks for checking in and the friendly words.


Some minor progress only today, the exhaust valve cages have got their drilling for the valve shafts and valve seats.
Some valves are matched and marked with numbers to each valve cage.
Next to do, making flanges for the exhaust manifold, some soldering and leakage test of the valves, followed by setting the holes for the rocker arm brackets.