A friend with Henneys called one of his Hennietta. I’ve never named my own cars.

Many years ago I made a very foolish mistake with a Packard flathead 8 engine, I removed the spark plugs without first blowing any debris out of the plug wells, or at the least carefully inspecting them before removing the plugs. The result - a small pebble, no doubt just road debris, had landed in a plug well and fell into the cylinder when I removed the spark plug. I decided to bring that piston up to near TDC in hopes I would be able to see and remove the pebble.

And the result of that was a blown piston followed by some very expensive engine repairs. I learned my lesson the hard way.

Thanks MJG - should I find that something was in fact dropped in I will definitely be dropping the pan and at least 2 oil changes will follow after a bit of engine time. I don’t feel you’re Monday morning quarterbacking at all and appreciate you taking the time, this is obviously a lesson I needed to learn and even if I find that nothing was dropped in the engine consider this learned!

If "the steering mechanism is located on the right", then the pic isn't mirror-inverted.

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If you can determine the thread size, maybe a thread-chaser will fix it. Whatever you do, though, do not use a die-nut as it will definitely ruin it for good! A thread chaser straigntens bad threads while a die-nut re-cuts them.

Forgive me for calling this imperial emperor car -> again on stage. Meanwhile I learned that the brand name of this end 1920s car is "Park".



image source: bbs.tiexue.net

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Took my micrometer out, measuring 16.995 mm or .6688 ", so a metric shaft on an autolite generator?

Really buggered up the shaft on my generator, fell off bench ad clipped the metal cross member on my bench as I was doing final assembly after repainting it. Tried needle file to clean up the thread but they are pretty messed up and subsequently buggered up the nut as well

I am measuring it using a spark plug/pipe gauge as 3/8" pipe with a 1.25 mm pitch. Originally thought it was 5/8 - 18

Anyone know what the pitch is? Not going to be simple to replace, car has the rare tachometer takeoff off the back of the generator

Thanks in advance

John

The other thing I would be concerned with is, how much metal has ricocheted off and circulated somewhere you don't want it? If my car and found the piston and head not obliterated I may drop the pan in conjunction with some oil changes in short intervals. I've never experienced this, but wouldn't want to.. I feel for you! Hate jumping on the Monday morning quarterback band wagon but plugs don't leave my engines one second longer than needed.

Thanks Steve, I appreciate it...

Lesson learned!