Peugeot 405 Manual

Cylinder head - reassembly
Engine removal and overhaul procedures / Cylinder head - reassembly


1 Lubricate the stems of the valves, 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.

9.1 Lubricate the valve stems prior to refitting
9.1 Lubricate the valve stems prior to refitting

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 seal firmly onto the guide (see illustration).

9.2 Fitting a valve stem oil seal using a socket
9.2 Fitting a valve stem oil seal using a socket

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, then repeat the procedure on the remaining valves.

5 With all the valves installed, place the cylinder head flat 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 camshaft(s), followers and shims (as applicable) as described in Part A or B of this Chapter.

7 On XU engines refit the gauze oil filter (clean) to the oil gallery in the cylinder head. If the filter is damaged fit a new one.

8 The cylinder head can then be refitted as described in Part A or B of this Chapter.


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