Machine C-clamps are more stout. You load the screw with a socket wrench. I have a fairly small one which "might work" if I added V-anvils. Never tried. Instead of change the slightly-worn timing chains in my OM617 engines, I just swapped in a 4 deg offset key on the camshaft sprocket.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans