tb 3 ic engine

[chuck foster]

i got to working on the valves tonight, i have set up to make 30 of them. so far i have 10 of the valve heads cut to size and shape only 20 more to go

i also got the drill rod to make the stems, hope to have them all done by the week end.

chuck

 

[Powder keg]

Damn! I haven't even ordered the material for my bits Chuck;o) I hope you are taking pictures?

Wes

 

[chuck foster]

well the 30 heads for the valves are now done..........what a neat little part to do.
the first pic shows the valve seat being cut with a lathe tool ground to (roughly) 45 degres.

center drilling for the valve stem hole

drilling for the valve stem hole

reaming valve stem hole to 3/32"

parting off

cutting groove in valve stem for the valve spring retainer clip. note the groove is .020" wide

this next pic shows a valve almost completed ......it just has to have the valve stem silver soldered to the head.

the last pic shows what 30 valve heads look like..............not much to show for 1 1/2 hours worth of work

the valve heads are made out of cold rolled steel and the stems are made out of drill rod, they should be all done by the week end and then it is on to the valve keepers and then the cylinder heads.

i have built several engines over the years but never one from bar stock or a team build, so far i'm really stoked about this whole project ;D i can't wait to see all the other bits and pieces for this project!!!!

chuck

hav'in waaayyy too much fun :big: :big:

 

[Powder keg]

Don't sneeze Chuck, or you'll be turning 5 more of those ;D ;D ;D

Wes

 

[kvom]

Two newb questions:

a) Why couldn't the head and stem be one part?

b) Did you use the chuck for the stem because you didn't have a collet that size?

Makes me happy I'm doing the tb2 flywheels as my first part. At least I can probably see what I'm doing ;D Hopefully by the time I need to cut the pushrod nuts my eyesight will improve.

Those things are tiny! Very impressive.

 

[kustomkb]

nice work, nice photo's too.

 

[chuck foster]

hey wes it is funny you mention not to sneeze..............i dropped 2 or 3 on the floor of my shop when i coughed and they were never to be seen again : :big:

kvom: you can make the valves all one piece but it is a very slow process, as you turn the valve stem smaller you have to take lighter cuts. if you don't the valve stem will try to climb up on top of the tool bit and then it will bend.

i used the chuck to do the stems because my 3/32" collet it worn out, i have an old set of collets and some need to be replaced!

if you think these valves are tiny look at this one. this valve has a .032" stem and a .098"dia head (the bolt is 0-80 ).......and it is made out of one piece.
it is for a small engine i have been working on for about a year or so : ........1/4" bore and 1/4" stroke

chuck

kustomkb: thanks for the compliments......the work was easy but the pics are another story,digital cameras and computers and all this electronic stuff just don't work well with me

 

[chuck foster]

well i got some more time in on the cylinder heads and the valves are all done except for the final lapping.

the heads started out looking like this

then i cut them to length

faced them off

put them in a jig i made so they would go on my rotary table

spotted all the holes (135 holes)

drilled them all

now i just have to finish the valve guides and press them into the heads.

this is one of the valve guides showing the hole for the valve and the valve seat, these should all be done in the next day or so...........i hope :

i hope i'm not boring anyone with these long posts

chuck

 

[Brass_Machine]

Umm bored with your long posts?? I think not.

Nice work. Keep it up!

Eric