Looking to adjust valves on a 2.2 chevy motor in a Corsica hydraulick lifter

Sorry but there is no valve adjustment with hydraulic lifters - can turn the lifter upside down fill with oil - let sit for a while and then tap on the lifters to see if they make noise - if noisy replace.  Camshaft may be worn on the lobes or may have jumped timing if belt.

Hydraulic lifters have no valve lash adjustments if u have a tick do an oil change with a flush possible sludge build up if still noisy and want the get hands a little dirty after 30 pop valve cover and check rockers and push rods rare that would need to be tightened also other problems can be valve carbon or plug fouling good luck

You can adjust the lifters on a 2.2, but first i would go to your GM dealer and get a bottle of E.O.S. this works very well at unsticking lifters;