Kia Troubleshooting Questions? Ask a Mechanic
welcome to just answers my name is Ricardo. sounds like you may be having oil volume and pressure problem replacing the hydraulic lifter may not solve the problem . first you need to make sure you are using OEM oil filter and the right motor oil according to the manual on your vehicle , if problem continues then you will need to have an oil pressure test done to make sure the pump is delivering the right volume and pressure to the head.
my suggestion is to do an oil change using an original factory oil filter and good brand oil. then see if the problem is fix if not then you need to have an oil pressure test and if it pass the test then you can go ahead and replace the lifter.