Rover 214 & 414 Service and Repair Manual - Rover club

2B•10 Engine removal and general overhaul procedures
12.2 Renew liner O-rings
rings and to the liner surface on each side of
the rings (see illustration).
3 If the original liners are being refitted, use
the marks made on removal to ensure that
each is refitted the same way round into its
original bore. Insert each liner into the cylinder
block/crankcase, taking great care not to
displace or damage the sealing rings, and
press it home as far as possible by hand.
Using a hammer and a block of wood, tap
each liner lightly but fully onto its locating
shoulder (see illustration). Wipe clean, then
lightly oil all exposed liner surfaces to prevent
rusting.
13 Piston/connecting rod
assembly - inspection 3
1 Examine all pistons for ovality, scoring and
scratches, and for wear of the piston ring
grooves. Use a micrometer to measure the
pistons (see illustration).
2 If the pistons or connecting rods are to be
renewed, it is necessary to have this work
carried out by a Rover dealer or suitable
engine overhaul specialist who will have the
necessary tooling to remove and install the
gudgeon pins.
3 If new rings are to be fitted to the original
pistons, expand the old rings over the top of
the pistons. The use of two or three old feeler
gauge blades will be helpful in preventing the
13.3 Removing piston rings with feeler
blades
12.3 Tap liner onto locating shoulder -
ensuring O-rings are not displaced
rings dropping into empty grooves (see
illustration).
4 When the original piston rings have been
removed, ensure that the ring grooves in the
piston are free of carbon by cleaning them
with a ring cleaning tool or an old ring. Break a
ring in half to do this.
5 When measuring new rings, lay out each
piston set with a piston/connecting rod
assembly and keep them together as a
matched set from now on.
6 Check the ring-to-groove clearance by
inserting each ring from the outside together
with a feeler gauge blade between the ring’s
top surface and the piston land. Check the
ring end gaps by inserting each ring into the
cylinder bore and pushing it in with the piston
crown to ensure that it is square in the bore,
20 mm from the top. Use feeler gauges to
measure the gap (see illustrations).
7 If the end gap of a new ring is found to be
too large or too small, double-check to ensure
that you have the correct rings. If the end gap
is still too small, it must be opened up by
careful filing of the ring ends using a fine file. If
it is too large, this is not as serious unless the
specified service limit is exceeded, in which
case very careful checking is required of the
dimensions of all components as well as of
the new parts.
8 Note that each piston should be considered
as being matched to its respective liner and
they must not be interchanged.
13.5a Measuring piston ring-to-groove
clearance
1689 Rover 214 & 414 Updated Version 09/97
13.1 Measuring piston diameter
14 Crankshaft - inspection
3
Warning: Wear eye protection
when using compressed air! Be
sure to clean oil holes with a
pipe cleaner or similar probe.
Checking endfloat
1 If crankshaft endfloat is to be checked, this
must be done when the crankshaft is still
installed in the cylinder block/crankcase but is
free to move.
2 Check endfloat by using a dial gauge in
contact with the end of the crankshaft. Push
the crankshaft fully one way and then zero the
gauge. Push the crankshaft fully the other way
and check the endfloat. The result can be
compared with the specified amount and will
give an indication as to whether new
thrustwashers are required.
3 If a dial gauge is not available, feeler
gauges can be used. First push the crankshaft
fully towards the flywheel end of the engine,
then use feeler gauges to measure the gap
between the web of No 3 crankpin and the
thrustwasher.
Inspection
4 Clean the crankshaft and dry it with
compressed air, if available.
5 Check the main and crankpin (big-end)
13.5b Measuring piston ring end gap