The DIY version of the tool is a ratchet that loosens the nuts holding on the cam caps. :wink: Measure all of the clearances and write them all down. Do the math to figure out the differences necessary. Pull the cam and replace all of the shims at once. Replace the cam. For the process, the timing belt can be clamped to the sprockets. Really, buying a tool seems more fun to me, but if you have more time than money...Andrew