Lifter replacement on a 5.3 Chevrolet needs a few tools and a little of time. It can take between four and five hours, depending on your skill level and the available tools.
Ensure you have the necessary tools before beginning work: Torque wrench, socket wrench, ratchets, 3/8″ drive metric sockets (10, 12, 14, 17, 19 mm), 3/8″ drive deep well sockets (10, 12 mm), 5/8″ drive metric sockets (18, 21 mm), breaker bar, 6″ or 8″ extension, and universal joint.
Once you have the necessary resources, you may begin. Remove the intake manifold first. This will provide access to the elevators. Then, using the socket set, remove the lifters with care. Keep note of which lifter originated from which spot.
After removal, replacement lifters can be fitted. Be sure to put a tiny amount of engine oil on the new lifters before proceeding. This will enable their smooth movement. Use the torque wrench to check they are tight after they are in place.
Finally, the manifold may be reinstalled. Use the torque wrench to confirm that the manifold is securely tightened.
It is not difficult to replace the lifters on a 5.3 Chevy, but it does take time and the proper equipment. With the proper equipment and a little bit of perseverance, you should be able to do the work in four to five hours.