1 Lubricate the stems of the valves of Fiat Punto, and insert the valves into their original locations (see illustration). If new valves are being fitted, insert them into the locations to which they have been ground.
2 Refit the spring seat then, working on the first valve, dip the new valve stem seal in fresh engine oil. Carefully locate it over the valve and onto the guide. Take care not to damage the seal as it is passed over the valve stem. Use a suitable socket or metal tube to press the seat firmly onto the guide (see illustration).



Lubricate the valve stems, and insert the valves into their original locations



Use a suitable socket or metal tube to press the valve stem oil seal firmly onto the guide


3 Locate the valve spring on top of its seat, then refit the spring retainer.
4 Compress the valve spring, and locate the split collets in the recess in the valve stem. Release the compressor of Fiat Punto, then repeat the procedure on the remaining valves.
5 With all the waives installed, place the cylinder head on blocks on the bench and, using a hammer and interposed block of wood, tap the end of each valve stem to settle the components.
6 Refit the thermostat housing.
7 Locate the timing belt tensioner on the mounting stud and refit the retaining nut.
8 On SOHC (8-valve) engines, refit the camshaft and cam followers, and the spark plugs.
9 The cylinder head can then be refitted.