Author Topic: Now That's a Hemi! or how I cut apart a Guzzi motor (Read 23207 times)

Chuck in Indiana · « **Reply #30 on:** March 26, 2019, 01:24:40 PM »

I saw a car that had been sliced with a wire EDM..

canuck750 · « **Reply #31 on:** March 27, 2019, 09:39:14 AM »

Made another deep cut, maybe too much chopped out, oh well can't undo it... I am impressed by how tight the Guzzi castings fit, even where they are not a sealing surface and they sure didn't spare the alloy, the block walls are seriously thick! I am out of sawsall blades and my band saw blade is done.

Chopping through the flywheel and ring gear should prove interesting, cut off wheel or band saw??

Groover · « **Reply #32 on:** March 27, 2019, 10:45:10 AM »

It's looking really good!

canuck750 · « **Reply #33 on:** March 27, 2019, 10:58:50 PM »

Cut the rocker covers and the font covers

I think I like cutting engines apart more than rebuilding them and when its done I don't have to tune it up

canuck750 · « **Reply #34 on:** March 28, 2019, 08:04:17 PM »

cleaned up an old corroded distributor, the main shaft is badly pitted but it make a good static display

Slit it down the length to expose the sleeved body and mount and see the shaft, you have to really peek deep down to see the distributor gear mesh wit the cam gear

Muzz · « **Reply #35 on:** March 28, 2019, 09:41:11 PM »

For cutting crankshafts and clutches I personally would use a 1mm slitting disk for the first try at least.

Chuck in Indiana · « **Reply #36 on:** March 29, 2019, 06:48:02 AM »

Quote

Chopping through the flywheel and ring gear should prove interesting, cut off wheel or band saw??

I would think the ring gear would be hardened. Cut off wheel for that. Assuming

the flywheel is cast, a band saw should go through it like butter. A file will tell you what to do.

AZRider · « **Reply #37 on:** March 30, 2019, 02:42:32 AM »

I am loving this!

Chuck in Indiana · « **Reply #38 on:** March 30, 2019, 06:43:55 AM »

Quote from: AZRider on March 30, 2019, 02:42:32 AM

I am loving this!

Yeah, it's way cool..

keener · « **Reply #39 on:** March 30, 2019, 08:11:14 AM »

Very nice work , shows so well the beauty of the Guzzi engine

canuck750 · « **Reply #40 on:** March 30, 2019, 02:26:18 PM »

Glad to hear some of you guys find this as interesting as I do! I see it as art more than mechanics .... I am not that cultured

I used a cut off wheel in my 4" grinder to slice through the flywheel, ring gear and steel clutch plates, I need to find some old clutch discs to clean up and slice.

I sawed open a carb at various points, hard to see the needle but it is exposed on the inner side of the carb

The enricher circuit, pulling up the lever (not attached) and a passage is opened to the intake drawing fuel up through the small brass tube extending down to the float bowl

The float with the fuel valve attached

slide and velocity stack

RinkRat II · « **Reply #41 on:** March 30, 2019, 03:02:52 PM »

Real artistry like that old guy Michael DiAngelo and his sixteen chapels!!

The fun parts got to be figuring where to cut for maximum effect. Great work

Plans on doing a whole bike??

Paul B

Muzz · « **Reply #42 on:** March 30, 2019, 03:50:41 PM »

Quote from: Chuck in Indiana on March 30, 2019, 06:43:55 AM

Yeah, it's way cool..

My sentiments exactly.

Edit: So pleased you dropped that idea of "no winter projects this winter".

This one is unique and every bit as good (and different) as your previous ones. I take my hat off to you sir!

canuck750 · « **Reply #43 on:** March 30, 2019, 04:14:35 PM »

Quote from: RinkRat II on March 30, 2019, 03:02:52 PM

Plans on doing a whole bike??

Hopefully not!

but …… I do have a junker 5 speed so I think I will cut it open as well and join it up, then I do have a used Eldorado final drive, now if I only had a spare swing arm ……..

I want to cut apart the old generator and mount it with a fan belt then cut apart a starter motor as well, then take it all apart and paint out all the cut surfaces red, add gaskets and seals and put it all together, make a stand etc …. I am considering increasing the piston / ring clearances and shorten the valve springs so I could hand crank if off the transmission output, maybe add some LED lighting inside the crank case and transmission case. I think it would be cool if I could figure a way to create a flash in the cylinder when the distributor fires

PS - If anyone has a pair of old used clutch discs for cheap that I can fit to this project please send me a pm
Thanks
Jim

canuck750 · « **Reply #44 on:** March 31, 2019, 05:42:43 PM »

I cut open a little window in the block to view the base of the distributor gear

I replaced the one cylinder because it had three broken fins but this cylinder has an iron liner and the bore must have been for a bigger piston so this piston is loose

I sliced open a piston

I had a Tonti crank in the motor but the pulley did not fit right, swapped in a spare Eldo crank

Trial fit the generator, deciding where to cut it open

I wasn't happy with the clutch cuts I made so I redid the angles

Installed the oil pickup and oil tube

lucian · « **Reply #45 on:** March 31, 2019, 05:51:16 PM »

Awesome!

Groover · « **Reply #46 on:** March 31, 2019, 06:36:56 PM »

Very educational too!

lucian · « **Reply #47 on:** March 31, 2019, 06:48:41 PM »

Maybe a stupid question, but what is the advantage of the helical cut timing gears? I am amazed at the robust build of these motors after seeing this.

Antietam Classic Cycle · « **Reply #48 on:** March 31, 2019, 06:55:31 PM »

Those appear to be V700 timing gears, which have finer teeth than later ones.

Rick4003 · « **Reply #49 on:** April 01, 2019, 10:54:51 AM »

Completely missed this thread! Where is that like button when you need it!

Very cool! I agree more like a piece of art than mechanics.

Rick4003 · « **Reply #50 on:** April 01, 2019, 10:58:54 AM »

Quote from: lucian on March 31, 2019, 06:48:41 PM

Maybe a stupid question, but what is the advantage of the helical cut timing gears? I am amazed at the robust build of these motors after seeing this.

Helical gears run quietly compared to spur or straight cut gears which make a load whining noise when they are running.

Compared to the later chain drive it doesn't have as much slack as the chain got and it doesn't have a chain tensioner to fail. Downside is that they are probably more expensive to make. They also create an axial thrust due to the angle of the helical cut gears. Spur gears and chains don't produce any significant sideload on the parts.

Muzz · « **Reply #51 on:** April 01, 2019, 05:05:05 PM »

Quote from: lucian on March 31, 2019, 06:48:41 PM

Maybe a stupid question, but what is the advantage of the helical cut timing gears? I am amazed at the robust build of these motors after seeing this.

Also have an increased load rating over straight cut, some 30% I believe.

canuck750 · « **Reply #52 on:** April 01, 2019, 08:57:54 PM »

I scratched my head for a long time trying to figure out how to mount the guide to the head, I came up wit this, slit the guide down its length in the mill, drilled a hole and counter sunk it through the guide to take a M4 machine screw, flattened two side of the machine screw to fit the width of the slit

I marked the head with a centre punch and drilled and taped the head, screwed in the machine screw then filed down the head and staked the screw head to the brass guide

I shortened the springs to reduce the pressure on the guide

Then set the retainer collar and collets, done

Cut open the rust breather box, blasted it and painted it

I took the generator apart and cut away the body and front cover then put it all back together

I fitted a set of rings to the cutaway piston, looks like the rings of Saturn

I fitted some gaskets to see if I should cut them flush or leave then whole?

Thinking I may leave the whole gasket, I think it helps the mind fill in the missing parts and understand the form, what do you think??

I just realized I cut the distributor so its facing the wrong way, don't use this 'build' as a how to guide

e.cleven · « **Reply #53 on:** April 02, 2019, 07:34:47 AM »

I vote to leave the gaskets whole.
This one heck of a project. I tip my hat to you.

Ride Safe.
Earl

Frenchfrog · « **Reply #54 on:** April 02, 2019, 04:04:16 PM »

Me too...this one is up to your usual very high standard canuk750 !

Chuck in Indiana · « **Reply #55 on:** April 02, 2019, 04:33:46 PM »

I like the valve cover gasket, but would trim the unsupported ones. <shrug> Just the same, this is a wonderful piece of art.

Muzz · « **Reply #56 on:** April 02, 2019, 08:14:12 PM »

Quote from: canuck750 on April 01, 2019, 08:57:54 PM

I just realized I cut the distributor so its facing the wrong way, don't use this 'build' as a how to guide

That's just not good enough Jim. You will just have to scrap the whole project and start all over again.

Just kidding.

I am in awe of this project. If you hadn't said anything I wouldn't have known, being a smallblock only guy.

canuck750 · « **Reply #57 on:** April 04, 2019, 07:33:21 PM »

I figured out a way to pin the spark plug to the head, I drilled a hole through the side of the plug then braised a brass rod to the hole in the plug. Drilled a deep hole in the head, filled it with JB weld and tapped the plug / pin into the hole.

Its pretty solid, when the JB weld sets up it should be rigid

I bought some sign paint called 'One Shot' and started to paint out the cut faces to see how it will turn out

Now to take the whole thing apart and paint all the cut faces