Straight 6 Cylinder Engine

[rdean]

I spent most of today drilling, taping, sawing, and reaming the rod ends.
I was rewarded with this.


And everything fit !!

Thanks for looking
Ray

 

[Boswell]

That looks fantastic

 

[rdean]

Thanks Boswell it's coming along.

Turned out 6 pistons but forgot to get a picture.
This is the setup I used for the rod end slot 0.750 deep.


I installed brass bushings in the rod ends for the wrist pins.
All six done and ready for the wrist pin holes but not today.


Thanks for looking
Ray

 

[BGHansen]

I love seeing your work; holy carp do you make progress in a hurry! I'm curious what software you are using for your CNC mill? FreeCAD, Fusion, etc. I have a Tormach that is WAY underutilized mainly because I'm just doing conversational programming and/or manual G-coding.

Thanks for taking me along for the ride!

Bruce

 

[rdean]

Glad to have you Bruce and thank you
I use Aspire software from Vectric in the UK.

Very hot in the shop so a short day.
Drilled the holes for the wrist pins.


They all fit nicely

Thanks for looking
Ray

 

[rdean]

Since things are fitting properly so far I thought it would be a good time to spot drill the block for the head bolts.



Then over to the drill press to finish drilling the holes to depth.


Then tap 24 holes 6-32 and glad to report all went well.
I was sweating that last hole as that's when the tap usually breaks off but not this time.

Thanks for looking
Ray

 

[Chris Hamel]

I understand your fear of breaking a tap. We've all had that oh sh.... moment.

 

[rdean]

I am kind of straying off course but I thought this would be a good time to see if i could make a cylinder head from the piece cut off earlier. If you remember I stood the 12" long piece straight up in the band saw and it cut straight and true. So why not try it again and cut a 5/16 thick piece. That should leave me just over 1" thick by 2.5" part 11.5" long for the cylinder head.


It worked out great with a 0.045 difference in thickness from top to bottom.
I trued that up on the mill and then cut another 1/2" off the width the same way to get to 2" wide. Sorry no pictures.

These are the two finished pieces.


Over to the CNC to spot the twenty four holes for the head bolts and the intake, exhaust valves, and the spark plugs.


Back to the drill press to finish drilling the head bolt holes.

Now for the real test I have 24 holes drilled and taped in the cylinder block 11.5" long. I have 24 holes drilled in the cylinder head and all the holes were drilled on a bench top drill press. A couple of thousands off on each hole times 48 and the bolts won't fit.

I was very pleaded that all the holes matched and the bolts went in without interference.
That is a mile stone for this project.


Thanks for looking
Ray

 

[Chris Hamel]

It's always nice when things work out

 

[tq60]

You should use 8-32, my favorite...

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