Posted by Forgot to mention on November 21, 2002 at 21:19:04:
In Reply to: Re: Replacing MW valve guides posted by Try this... on November 21, 2002 at 21:15:20:
Lay the wrench jaws flat on the piston surface, not at right angles to it, so the jaws form sort of a U around the long axis of the guide. A 6" wrench should do the trick.