1995 LAND ROVER DISCOVERY seats

ENGINE
20
OVERHAUL
6.Remove spring cup, valve spring and spring
seat. Keep components in their fitted order.
7.Remove and discard valve stem oil seal.
8.Remove valve, and retain in fitted order.
9.Repeat above procedures for remaining
valves.Cylinder head - inspection
1.Decarbonise cylinder head.
2.Examine cylinder head for cracks, pay
particular attention to area between inlet and
exhaust valve seats. Cracks indicate engine
has overheated and cylinder head must be
replaced.
3.Check core plugs for signs of corrosion and
leakage, replace as necessary.4.Check cylinder head for warping using a
straight edge and feeler gauges.
Maximum warping = 0.08 mm
CAUTION: Cylinder head must not be
refaced, if warping exceeds figure given,
head must be replaced.
5.Check valve seat inserts for burning, pitting or
damage, replace inserts if pitting cannot be
removed by valve lapping-in or refacing.

ENGINE
OVERHAUL23
5.Position cylinder head on bed of hand press.
6.Position replacement valve guide to cylinder
head, ensuring that groove for valve stem seal
is facing away from cylinder head.
7.Position distance piece, toolLRT-12-515and
valve guide replacerLRT-12-046to valve
guide.
8.Press valve guide into cylinder head until
distance piece contacts face of head; remove
tools.
9.Allow cylinder head to air cool.Valve seat inserts - refacing
CAUTION: Prior to refacing valve seats,
check valve head stand down. If, after
refacing, valve head stand down will be
below limits, seat inserts must be replaced.
1.Support cylinder head on its side on suitable
blocks of wood.
2.Loosely assemble pilot, toolLRT-12-502and
a suitable expandable collet, ensuring that
chamfered end of expander is towards the
collet.

ENGINE
OVERHAUL27
Valves and springs - refit
1.Lubricate valve stems, guides, spring seats,
valve springs, spring cups and collets with
engine oil.
2.Lubricate new valve stem oil seals with engine
oil and fit to valve guides.
3.Fit spring seat, insert valve into its respective
guide, fit valve spring and spring cup.
4.Compress valve spring using toolLRT-12-034
and fit collets.
5.Remove toolLRT-12-034.
6.Tap spring cup with a soft mallet to ensure that
collets are correctly seated.
7.Repeat above procedures for remaining
valves.Cylinder head gasket selection
CAUTION: New cylinder head gasket
should be same thickness as the original.
If, however, cylinder head, pistons or
crankshaft have been replaced, it will be
necessary to check piston stand proud in order
to determine the correct thickness of gasket.
1.Position a magnetic base DTI to cylinder block
top face adjacent to number 1 cylinder bore.
2.Position stylus of gauge to cylinder block top
face on edge of number 1 cylinder bore; zero
gauge.
3.Rotate crankshaft in a clockwise direction until
numbers 1 and 4 pistons are at TDC.
4.Position stylus of DTI gauge near edge of
piston crown, measure and record number 1
piston stand proud. Measurement must be
taken at front and rear of piston and highest
protrusion figure recorded.
5.Repeat above procedures for remaining
pistons.