The trick is to tighten the compression fittings onto the tube just enough to prevent coolant leakage, not cinch down on them as tight as they'll go. Once they're crimped onto the tube, there's no way to undo the process, so wait until you're sure everything is fitted properly before you final-tighten those little compression sleeves. Particularly, watch the clearance of the tube near the pushrod cover- - - -no touching!
Jerry
