An assortment of new and remanufactured cylinder heads are easily procurable for most engine models at dealerships and auto spare parts selling centers. Because specialized tools are required for the procedures of disassembly for inspection and replacement, replacement parts for the heads may not be easily accessible, it would not be very cost effective for the home mechanic to perform the procedures of disassembly, inspection and reconditioning the heads and therefore it may be cheaper to buy replacement heads. They said that deconstruction includes eradication of intake and
Exhaust Valves and many related parts. If not already done, then disconnect the rocker arm by using the spanner to loose the nut, the pivot ball and the flat rockers off the cylinder head studs. They can be labeled or placed in small plastic bags with legend to make it easy to refit them in their respective places in the valve train. Press down the springs on the first valve with the aid of a spring compressor then take out the lock on the valve stem using a needle-nose pliers or a magnet. Slowly let-go of the valve spring compressor and take out the retainer, sleeve if there is one, spring, and spring seat if there is one as well. Screw the valve off the head and take out the oil seal from the guide hole. If the valve binds in the guide, push it back into the head and take a fine file or whetstone and smoothen the area around the stem lock groove. Perform the same process for the other valves so it is easy to refurbish the different components belonging to each valve before reinstalling it. All valves and all other related parts that are going to be used later should be removed and stored in the best way possible manner; then, the head should be cleaned very well and it should be examined. In a scenario were an entire engine overhaul is being carried out, it is advisable that the processes of disassembly of the engine should be completed before proceeding to the cleaning as well as inspection of the cylinder heads.