Hit me - Miss me?

[gjn]

Never thought of a head job like that before - must be my debauched upbringing. Still it looks good and it's most likely the only type we'll get these days.

 

[Maryak]

Gavin,

Thanks for your input. :bow:

Today saw the underside of the head completed.

Drilling for the head bolts and cooling water passages.

Drilling the intake and exhaust passages.

Machined to thickness and the rim radius.

Some time ago a friend of mine who is a vintage car and motorbike collector/restorer gave me a 6V coil. Last week I asked him did he have a spare condenser.

This is the result.

Now all I have to do is build an engine to drive the magneto.

Have a great weekend

Best Regards
Bob

 

[steamer]

The cam cutting chart looks similar to one I used....you still have to watch out an not make an indexing error.....Nice job!

Dave

 

[gjn]

Bob

The exhaust & intake runners that you are drilling in from the side appear to go through a couple of your previously drilled vertical holes, is that an optical illusion on the photos or are they plugged in some way after the drilling?

Rgds - Gavin

 

[Maryak]

Dave,

Thanks for your continued support. :bow:

Gavin,

They what you get when you don't pay attention.

They are water cooling passages drilled in the wrong place. They will be blocked by not drilling the matching holes through the water tank and not putting holes in the head gasket. As you can see they don't come right through. So only those who read this will know of the mistake. : I sure as hell don't intend to start again when it's a recoverable error.

Thanks too for your continued support. :bow:

Best Regards
Bob

 

[Deanofid]

The head finished off nicely, Bob. I'd put a big blue arrow pointing to the spark plug hole. That's just me,
'cause I know I'd tap the wrong one if I didn't!
Mum's the word about the extra holes in the ports, then.. Got it! ; )

Thanks for the update.

Dean

 

[Maryak]

Dean,

Thanks for your continued support. :bow:

Not a lot to show again.

I hacked up a cast iron offcut from the cylinder to provide 2 pieces for the valve guides.

Here is a picture of 1 piece machined to the guide major diameter - 5/16"

As accuracy is a necessity with the guides, my next job is to make a collet holder for the lathe. Having hunted around and found a suitable piece of steel I will start a thread on making this item.

Best Regards
Bob

 

[gjn]

Bob

I look forward to the collet holder build, I want to use 5C collets but the cost of the holder from H&F has put me off, not to mention the cost of a D1-4 collet chuck :-X

 

[Philjoe5]

Thanks for the update Bob. As they say "dead men tells no tales" :big:

You know someday, 1,000 years from now, somebody's gonna dig up one of our engine models from the primal ooze, take it apart and wonder what the heck that hole/groove/blind threaded port that we've hidden so well is for?

Cheers,
Phil

 

[Maryak]

Gavin,

Thanks again for hanging in there. :bow:

Thanks for the update Bob. As they say "dead men tells no tales" :big:

You know someday, 1,000 years from now, somebody's gonna dig up one of our engine models from the primal ooze, take it apart and wonder what the heck that hole/groove/blind threaded port that we've hidden so well is for?

Cheers,
Phil

Phil,

Thanks for your continued support. :bow:

Yes and after a masters thesis on it, they may and I stress, just may, decide it was a mistake.

Best Regards
Bob

 

[Captain Jerry]

You know someday, 1,000 years from now, somebody's gonna dig up one of our engine models from the primal ooze, take it apart and wonder what the heck that hole/groove/blind threaded port that we've hidden so well is for?

If it takes 2000 years, they may put it in a shrine.

As accuracy is a necessity with the guides, my next job is to make a collet holder for the lathe. Having hunted around and found a suitable piece of steel I will start a thread on making this item.

That will be worth watching for sure. I'm beginning to appreciate the art of toolmaking and I'm looking forward to this one.

Jerry

 

[Maryak]

Jerry,

Thanks for stopping by. :bow:

My collets are ER 16 so no draw bar is required and this is handy if you have a long piece of stock.

Best Regards
Bob

 

[zeeprogrammer]

Looking forward to the lathe collet holder thread.

I just took a quick scan (every two pages) of your thread...looks like a lot of parts!
Any chance of a "here's where we're at" pic?

 

[Maryak]

Zee,

Thanks for stopping by. :bow: Your wish is my command, I will arrange a photo of where I am. ;D

Best Regards
Bob

 

[ozzie46]

Bob, I'll be watching the collet chuck build as well. I have some ER type collets as well but they use an MT3 shank with draw bar. Got them from CDCO here in the States. I already have the nut so I just need to make the chuck for the headstock spindle so I can do away with the draw bar

So many roun toits! So little time! ;D ;D

Ron

 

[Maryak]

Bob, I'll be watching the collet chuck build as well. I have some ER type collets as well but they use an MT3 shank with draw bar. Got them from CDCO here in the States. I already have the nut so I just need to make the chuck for the headstock spindle so I can do away with the draw bar
Ron

Ron,

I am in the exact same position and the valves and valve guides have given me the necessary push to mount the collets in the lathe as well as on the mill

Best Regards
Bob

 

[Deanofid]

I'll bet you like having a 'through' chuck for those collets, Bob. You may remember, after you bought
your collet set from the Hong Kong outfit, I bought some directly afterward. Made a chuck/closer for
them to fit the Atlas spindle a few months back, and man, they're handy!

Dean

 

[Maryak]

Dean,

Thanks for the support. :bow:

Now that you mention it, I DO remember your buying collets from CTC shortly after me.

Great minds think alike, (even greater minds look on in disgust). :big:

Best Regards
Bob

 

[Maryak]

Hi Guys,

Finally made a couple of parts for the engine - The Valve Guides and I just have to say the collet chuck for the lathe worked a treat.

Holding the valve guide prior to drilling

Reaming the valve guide

Two completed valve guides ready for pressing into the cylinder head.

Best Regards
Bob

 

[arnoldb]

Good going Bob.

Glad you like the collet chuck!

And a neat example of a home-made D-bit reamer as well ;D

Regards, Arnold