Resurrection of a Deutz MAH 914, 1952? Lets see!

[cobbadog]

You are getting closer to the finish and it is looking great.

[sirpedrosa]

Cobba, Gentes

One more bit. Governor lever spring - ONE of 2.

One was lost, and the other came at gold price.

Take a look at date of order and my patience to let them search for other spring.

After all its not only the engine that is tricky, some suppliers too! 

2 pics for the show.

Cheers
VP

[cobbadog]

Well you cannot call that service nor cheap. In cases like a simple coil spring I measure the thickness of the wire and how many turns per inch and go to the local hardware store and buy one as close to size    as possible. Then I cut them to length. So far they have all worked well.

[sirpedrosa]

Gentles

Pushing the German some more steps... but before reassembling Im making the trolley, and a temporary skid to hold it.

The trolley will be reinforced with 2 steel corner beams.

3 pics for the show.

Cheers
VP

[cobbadog]

I know if I do something as a temprary measure it ends up staying that way.

[sirpedrosa]

Gentles

The German is going up!

Today put crank on place and measure the play 43/100 mm.

the 2 threaded rod studs help to align ball bearing boss to crankcase.

A few pics for enthusiasts.

Cheers
VP

[sirpedrosa]

Gentles

Liner is in, and oil pump too.

Rod and piston next. Piston needs heat to put pin.

A few pics to the show.

Cheers
VP

[cobbadog]

Hi VP, still making good progress. Why does the piston need heat? Is it to fit the gudgeon pin? If so I would have thought that to be too tight a fit.

[sirpedrosa]

Gentles, Cobba

Cobba, yes is a tight fit, and is a good sign!

Put flys on crank to see how they fit. Gorgeous don't they?

1 pic to the show.

Cheers
VP

[sirpedrosa]

Gentles

After a work day nothing else better than some yoga by the German.

Give some heat to piston with hot air gun... and voilá pin slipped like butter. well not quite! 

I put all piston rings aligned at 180º from each (with gap by OD of pin), and oil ring by the pin to avoid any force on the ring tips. (Please tell if this is the right way).

Snug large end and give a few rotation and take cap out to see if everything was ok. put back cap.

Made a small oil sump (brake spray cap) and fill with oil, and give several rotation to crank, to put pressure at oil pump. As you can see it drips nicely.

Piston course at honed liner looks sweet!

Things look to come together.

A few pics for the audience.

Cheers
VP

[cobbadog]

I dont know what is the absolute correct positioning for rings gaps are but fitting them at 180' to each other to me gives the most chance of a better seal. Some fit them with an offset gaps around the piston. All seem to work.

[sirpedrosa]

Gentles

Today got head from VEICOMER (https://veicomer.com/en/);

New bronze valve guides, milled surface, and top valve stems.

Now prepare all to put the German snoring.

A special thanks to Mr. Pedro, the VEICOMER's owner - as you can see he's also a man with hands on job, on top of running all the show at shop.

A few pics to the show.

Cheers
VP

[sirpedrosa]

Gentles.

Because head got slight skim, now I got to do some math to confirm travel of valve stems.

Pay some atention do this pic: https://listerengine.com/smf/index.php?action=dlattach;topic=9555.0;attach=7412;image;

As you can see Cam lobe has 8mm profile, therefore got to extend measure to rocker arm, to get max travel of valve stem, and math says it will be max 13mm.

See pic!

Cheers
VP

PS: Late night putting things together, to avoid breaking bits one against others.

[cobbadog]

I had a similar but different problem to fix when I did my McDonald. I had to pack the connecting rod with spacers to increase compression ration but did not know how many. So with piston at TDC and on the highest lobe of the cam (long story on that comment) I started pushing the valve open until I felt it touch the piston and measured that then took out some clearance for heat expansion and problem solved.
Highest lobe on the cam is funny. The cam has 2 lobes one to give a little drop in compression for starting cold then once running it passes over that small lobe so fast it does not notice it.

[sirpedrosa]

Gentles,

A few more bits and tweaks.

1 - Big end torqued at 140NM; And oil pump by eyeball!

2 - IP tappet got also serial number;

3 - tin prove to get TDC bump clearence;

4 - tin smashed by piston at TDC;

5 - measuring clearance;

6 - Torque head nuts at 170NM... by now! [it has 3,6mm of clearance, therefore low compression, and I think this is why it need zundfix starting cigarettes]