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"When I wanted to make certain the engine wasn't blocked by turning the crank-shaft manually with a tool without plugs, after have made one and a half tour, the engine has blocked."

Kajyk77, Bonjour et bienvenue aussi du Canada ! Je me demande si vous avez une valve coinc?e dans le moteur puisqu'il tourne un peu. Les meilleurs conseils que je peux donner sont d'enlever la culasse et les couvertures lat?rales et le soak de valve ils en carburant diesel ou p?trole penetrating. Bonne chance

Eric , My French is pretty lousy but I hope my message is understandable. In the first posting I interpreted his posting to say that he has removed the plugs and was able to turn the engine 1 1/2 revolutions before it was stuck. I am wondering if it isn't a stuck valve not opening that would cause this. I suggested he remove the head and valve covers and use penetrating oil or diesel fuel as a solvent as it would possibly be more readily available than PB Blaster etc.
That is a curious foot pedal? I see the hand brake lever is still in place so I am curious to know what that extra lever does.

was able to turn the engine 1 1/2 revolutions before it was stuck

Big clue that I missed! That would suggest a frozen valve, just as Clipper47 has suggested.

Regarding the mystery pedal... my '50 has an aftermarket foot operated pump for a windshield washer, this may be something similar.

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That would be my guess. I owned a few cars in the 50's which had that type of windshield washer mechanism.

Dave, I missed it too! Yes, it's probably just a stuck valve. The best way to do that is to remove the head, get some PB Blaster or the like, and a rubber mallet. Turn the engine the other way and give it a sharp "whack", but not too hard as to bend the valve. I've done this several times with good luck and not bending the valve.

As for the w/w pump, never seen one of those, but now I will remember it!

Can't see a windshield washer bottle in Pierre's pic of the engine compartment, however that's not to say it's not there somewhere but out of sight.

The after market washer in my Packard didn't use anything as elegant as a washer bottle. It used a blue plastic/vinyl bag that was hung somewhere on the inner fender. I found the bag all petrified and covered with crud in the trunk. I'll be removing the foot pump thing when I re-carpet.

Regarding the foot pedal, maybe someone retrofitted one of these: Pedal

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