Cylinder head service involves the removal and disassembly of the intake and
Exhaust Valves along with their related components. Specialized tools are necessary for disassembly and inspection, and since replacement parts may not always be readily available, it can be more practical and economical for the home mechanic to purchase a replacement head instead of disassembling, inspecting, and reconditioning the original head. New and rebuilt cylinder heads for most engines are typically available at dealerships and auto parts stores. Before removing the valves, label and store them along with their components separately to ensure they can be reinstalled in the same valve guides. Measure the valve spring installed height of each valve and compare it to the specifications; if it exceeds the specified height, the valve seats and faces require attention. Use a spring compressor to compress the valve springs on the first valve, then remove the keepers, and carefully release the compressor to take out the retainer, springs, valve stem seal, spring seat, and valve from the head. If a valve binds in the guide, push it back into the head and deburr the area around the keeper groove. Repeat this process for each remaining valve, ensuring all parts for each valve are kept together for reinstallation. After all valves have been removed and stored, thoroughly clean and inspect the head, completing engine disassembly procedures if a complete overhaul is being performed before starting the cleaning and inspection of the cylinder head.