VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1912-1928 Flywheel for a 28

Hello,
As some of you may know, I purchased my National completely disassembled and I’m working on getting it back together. There was a flywheel in the pile of parts that I assumed was originally on the car. However, now that it is time to put the flywheel back on the crank I have been looking closer at it. The part number that is cast into it reads 344100. This is the same part number given in the Schools in Session post found in Tech Talk. But the date in the casting reads F56. Correct me if I’m wrong, but I think this means the part was made in early July of 1926.
My question is, will this flywheel work in my 28? The bolt holes line up and the crank fits perfectly.
Also, if it will work, what is the proper mounting position? It does not have the same UIE marks as on the flywheel that was made in 1928.
Thanks for any help or advice you can give.
Jim

Hi Jim,

Part number 34100 is not in my four cylinder parts books, but the books do say that the correct flywheel has 110 teeth, so that's a clue.

As for the U|C mark, you can make your own. ;-)

When I was resurrecting my '28 Canopy Express, I found that the previous owner put the flywheel on incorrectly, so the U|C mark did NOT appear in the little window with the pointer (on the flywheel cover) when cylinder number 1 was at top dead center (TDC) at the end of the compression stroke. I did not want to pull the engine just to unbolt and re-bolt the flywheel on correctly, so I set cylinder number 1 at top dead center (TDC) at the end of the compression stroke (I had the oil pan off so I could see that the crank offset was pointing directly upward and I used a wood dowel through the spark plug hole to 'feel' that the piston reached it's top position) and then I painted a fluorescent pink line on the flywheel that lined up with the pointer in the window.

That was nine years ago and I still use the pink line to time the engine. Here's where I describe how I time and start my trucks: Timing and starting a 1928 Chevy engine

After you get the flywheel on with your timing line ;-), I do suggest that you mark that position of the flywheel with a couple of punch marks on the flywheel and the crank, and have the crankshaft balanced with the flywheel in that position.

Cheers, Dean

Yes it will work on a 28 motor.

Thanks for the help, guys.
Dean, my flywheel does indeed have 110 teeth. I’m proceeding, following your instructions. Huge help. Thanks again.
Jim

I had the same experience as Dean with an improperly located flywheel, yes they will run but it was out of balance and gave the motor an odd uhhnn uhhnn uhhnn sound , So just check when you run motor that it feels and sounds smooth or if you have the notion and are using new pistons get it balanced, Ray