Degreeing the cam


http://209.208.111.198/Topic13459.aspx 		Print Topic | Close Window

By Sanman - 17 Years Ago
Hi, does anybody make a crank socket for a degree wheel that fits the 292 Y-block or just a regular crank turning tool, nut or socket type.

Thanks

By Hoosier Hurricane - 17 Years Ago
Sanman:

Small block chevvies have the same crank snout diameter as a Y Block, so the tool should fit.  I just use a short 9/16 fine thread bolt and a flat washer, but with that sometimes I can't back up, the bolt loosens.

John in Selma, IN

By charliemccraney - 17 Years Ago
I think the sbc has a smaller keyway.  Probably won't be hard to make one work.

Minutes later...

I just measured one of my cranks.  There is about 1 3/16 between the end of the crank and the beginning of the key.  The sbc socket may not be deep enough to engage the key.  I seem to remember trying an sbc socket on the crank while it was at my friends shop for balancing.  I don't think it worked.  I'm sure I  would have bought or borrowed one if it did.  Who here has an SBC crank socket?

By Ted - 17 Years Ago
The Y-Block crankshaft snout is roughly 0.0025” larger in diameter than the snout on the SBC which is essentially the same size.  I do use a the crankshaft tool that’s designed for the SBC for the Y but I had to lightly hone the inside of it and added a ¼” slot to accommodate the larger Y key.  After modifications, it still works on the scrub engines.  Here’s a pic.
By pegleg - 17 Years Ago
how did you cut the Y block slot?
By Ted - 17 Years Ago
I used a broaching tool with an arbor press.  Here’s a pic of a crank gear that I’m installing a new timing slot in.  Same methodology.
By MoonShadow - 17 Years Ago
I just had some keyways cut and was amazed at how simple it is. Most machine shops have broaching tools so it shouldnt be too hard. Also, if anyone has taken apart an Interceptor boat motor they have a spacer behind the crank pulley that is already the right size and has a slot for the keyway. I just ground some flat sides on it for a wrench. Could weld a socket to the end eaisly too. I think these spacers are usually just thrown away. Chuck in NH
By Hoosier Hurricane - 17 Years Ago
Another method is to install the key and get a large enough adjustable wrench to fit the shaft diameter, and when you turn the wrench against the key, the shaft will turn easily.

John

By Sanman - 17 Years Ago
Hi, Thanks for the info, I was being lazy, I wanted to buy something rather than make it, I will make something tonight, Thanks for your help.