How do to loosen cam drive sprocket nut?

[MrMike55]

Hi, I have a f115 top crank seal leak. I removed the flywheel but the crank keeps turning when I try to remove cam sprocket nut . How do I stop the shaft from spinning? Do I use a cam sprocket tool and hope the timing belt does not slip or break? Mike

[Keithbaja]

Oh my !........

[boscoe99]

What are you using to turn the bolt? Impact gun works for me.

Normally the cam shaft drive belt is removed before removing the cam shafts.

But you must not let the cam shaft turn when it is not connected to the crank shaft via the drive belt. A tool is used to prevent the cam shaft from rotating.