Cam degreeing help me understand!

RustyRatRod said

Also, what are you using to turn the crankshaft? What type of device and how is the degree wheel mounted? Unless you spent a good bit on a crank socket, I can almost guarantee you that your crank socket is moving on the crank. There aren't but one or two on the market worth a crap.

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I have shimmed the wheel in between cardboard disks I cut out and its bolted on with he crank bolt. Its wedged I between the crank and the washer on the bolt. Once again tho if that was the issue how could it be right at tdc every time both ways? I can go Clockwise to TDC and its zero! Go Counter CW to TDC and its still zero. So I don't understand how it could be moving. That was my first thought also! I will try the positive piston stop and set it to TDC that way. I don't think I'm 20 degrees off TDC but I will try it.