I just got my 1922 Model 490 Chevrolet Touring running - but not for long. The crankshaft pulley which drives the fan belt/cooling fan does not have a bolt holding it onto the end of the crankshaft, and it simply spins off after starting the engine.
There does not seem to be any threads in the hole at the end of the crankshaft, how exactly is this pulley secured? A press fit? Glue?
The pulley is held on by friction not a screw or bolt. You may need a shim to have them fit tight enough. If you have accurate measuring devices (calipers) the gap can fairly quickly determined. Try a piece of aluminum beer can that wraps all the way around the crankshaft end. Or heavy duty aluminum foil or shim stock. It only takes a thousandth or two interference to hold the parts together. You can also knurl the end of the crankshaft if you know what you are doing. Loctite can work depending on the gap between the parts. Taking it back apart can be a challenge if you don't know that Loctite has been used. There are other means but those require more expertise or experience or machines.
Chipper: that's all I need to know, I will probably try your heavy duty aluminum foil trick first. I also have some pretty thin brass sheeting that could be Plan B. The beer can, I don't think I have that kind of gap, but you never know until Plan A and B both fail....
I understand the desire to bolt it in place. However that would either require a difficult process to accomplish without taking the crankshaft out of the engine. I was trying to propose solutions that didn't require machinist talent or removing the crankshaft. Might not be the best but might just work.
If the crank is the same diameter as a 216 or a 235 there are fixtures made to drill the crank,I just got done drilling the crank on the 235 that is going in my 37.
I just used Loctite 660 for this repair. It’s a product made exactly for this type of application. It can also be used to repair loose fitting woodruff pins. I bought the primer to add to the bonding strength.
