I'm trying to replace my timing chain guide rails on my 560sl and am kind of stuck. I've read a lot of other posts on the subject, but still have a few questions.

This one may be stupid, but I'd rather ask it then be sorry. I've fabricated a pin puller out of a 6mm thread bolt some washers and a socket and I guess the theory is that turning the bolt will pull out the pin as the socket (used as a sleeve) bears down on the side of the cylinder head around the pin.

The questions is is there any chance that the pressure could crack the side of the head. Also, I put a lot of force on the head already and the pin didn't budge and the washer at the top of the bolt pulled thru. Any sugestions as to how to go forward?

Thanks,

Steve