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I measured the ID of the harmonic balancer/pully that I took off of my 292. I get 1.248 using a mic and a telescope gage.The shaft should be no more than .0005 smaller than the balancer, I think. I don't know what I did with the cam but if you want a more accurate OD, I can hunt it down.
Les.
I have a 239 CI motor with the front of the crank easily accessible. The nose of that crank measures 1.250. They should have the same nose diameter. I re-measured the damper and am getting 1.249 (I'm a little out of practice). The damper is from a 64 292 I can't imagine a reason for changing the nose diameter. Seems like a lot more press fit than would be required but I'm sticking to those two numbers. Your machinist will have good advice on that. It's a lot easier to take more off than to put some back on. Hope this helps.
Last edited by ManFordman2; May 9, 2024 at 01:15 PM.
Reason: Correction
I really appreciate you measuring your crank. I'm reasonably sure all the Y block crank pulled will interchange. Mine is a 64 292 but I'm not sure what I got the damper from. It's the one with narrow grooves not 1/2" ones.
BJ, you probably already know this, but Ted has a 3 part article on his website on how to degree in a camshaft. After I told him the trouble I had, he wrote the article.
Ted has a 3 part article on his website on how to degree in a camshaft.
Yes Dennis, I got ahold of him after reading the articles over some confusion I had. He's gave me several pointers and suggestions. Glad there are folks like him, very few, that know these ole Y Blocks.
If you don't mind me asking how did you attach your degree wheel to your crank? With the key way set back so far you can't use one of the regular degree wheel mounting hubs. Like this.
I printed a degree wheel off the internet and glued it to cardboard. I used the bolt and washer from the crank and tightened it up. The 239’s don’t have a dampener. Fastened a wire to a bolt.
