Valve Lash Adjustment

Wazoo I have to agree it is pretty odd for a roller cam to go bad but as lilcuda noted anything is possible but I wish you the best of luck. Also I'd like to say that I know you don't want to pull the rocker shafts off but that's probably the only way you'll get the pushrods out to inspect them and you really should do it. In about 30-40 minutes you should be able to pull the rocker shafts off, take each pushrod out to inspect them and have a look down inside to see if everything looks ok and there are no metal shavings floating around due to something being worn so it's well worth your time.