Cylinder Head - Removal And Refitting - PEUGEOT 205 Manual

2A•6 XV, XW and XY series engine in-car repair procedures
6.4a Prise off the circlip (arrowed) from the end of the
rocker shaft . . .
4 To dismantle the rocker arm assembly,
carefully prise off the circlip from the end of
the rocker shaft; retain the rocker pedestal, to
prevent it being sprung off the end of the
shaft. Slide the various components off the
end of the shaft, keeping all components in
their correct fitted order (see illustrations).
Make a note of each component's correct
fitted position and orientation as it is removed,
to ensure it is fitted correctly on reassembly.
5 To separate the remaining pedestal and
shaft, first unscrew the rocker cover retaining
stud from the top of the pedestal; this can be
achieved using a stud extractor, or two nuts
locked together. With the stud removed,
unscrew the grub screw from the top of the
pedestal, and withdraw the rocker shaft.
Camshaft
6 Remove the cylinder head as described in
Section 7.
7 Undo the retaining bolt, and remove the
camshaft retaining thrust plate from the
cylinder head (see illustration).
8 Withdraw the camshaft taking care not to
scratch the bearing journals with the edges of
the cam lobes (see illustration).
Inspection
Rocker arm assembly
9 Examine the rocker arm bearing surfaces
which contact the camshaft lobes for wear
ridges and scoring. Renew any rocker arms
on which these conditions are apparent. If a
rocker arm bearing surface is badly scored,
also examine the corresponding lobe on the
camshaft for wear, as it is likely that both will
be worn. Renew worn components as
necessary. The rocker arm assembly can be
dismantled as described in paragraphs 4
and 5.
10 Inspect the ends of the (valve clearance)
adjusting screws for signs of wear or damage,
and renew as required.
11 If the rocker arm assembly has been
dismantled, examine the rocker arm and shaft
bearing surfaces for wear ridges and scoring.
If there are obvious signs of wear, the relevant
rocker arm(s) and/or the shaft must be
renewed.
Camshaft
12 Examine the camshaft bearing surfaces
and cam lobes for signs of wear ridges and
scoring. Renew the camshaft if any of these
conditions are apparent.
condition of the bearing surfaces, both on the
camshaft journals and in the cylinder head. If
the head bearing surfaces
excessively, the cylinder head will need to be
renewed. If the necessary
equipment is available, camshaft bearing
journal wear can be checked by direct
measurement, noting that No 1 journal is at
the transmission end of the head.
13 Examine the thrust plate for signs of wear
or scoring, and renew as necessary.
Refitting
Camshaft
14 Ensure that the cylinder head and
camshaft bearing surfaces are clean, then
liberally oil the camshaft bearings and lobes.
Slide the camshaft back into position in the
cylinder head.
6.7 Camshaft retaining thrust plate
6.4b . . . and slide the components off the shaft
15 Locate the thrust plate in position, refit the
plate retaining bolt, tightening it to the
specified torque setting.
Rocker arm assembly
16 If the
dismantled, refit the rocker shaft to the
pedestal, aligning its locating hole with the
pedestal threaded hole. Refit the grub screw,
and tighten it securely. With the grub screw in
position, refit the rocker cover mounting stud
Examine the
to the pedestal, and tighten it securely. Apply
a smear of clean engine oil to the shaft, then
slide on all removed components, ensuring
are worn
each is correctly fitted in its original position.
Once all components are in position on the
measuring
shaft, compress the remaining pedestal and
refit the circlip. Ensure that the circlip is
correctly located in its groove on the shaft.
17 Refit the cylinder head and rocker arm
assembly as described in Section 7.
7 Cylinder head - removal and
refitting
Note: If the crankshaft is to be rotated after
removal of the cylinder head (for cleaning the
pistons) it will be necessary to use the
Peugeot special tool to hold the camshaft
6.8 Removing the camshaft
rocker arm assembly was
4