Kia Cerato 2009 Service Manual page 63

(2) Install the valve, valve spring and spring retainer.
Place the valve springs so that the side coated with enamel faces toward the valve spring retainer
and then installs the retainer.
(3) Using the SST(09222-2A100, 09222-3K000)(A), compress the spring and install the retainer locks.
After installing the valves, ensure that the retainer locks are correctly in place before releasing the valve
spring compressor.
(4) Lightly tap the end of each valve stem two or three times with the wooden handle of a hammer to ensure
proper seating of the valve and retainer lock.