1999 LAND ROVER DISCOVERY light

ENGINE - V8
12-2-38 REPAIRS
16.Remove 12 bolts securing sump flange to
engine.
17.Manoeuvre sump over front axle and remove
sump.
18.Discard sump gasket.
Refit
1.Clean all traces of sealant from the sump and
sump mating faces using a plastic scraper or
solvent.
2.Ensure bolt holes in cylinder block are clean
and dry.
3.Apply a 5 mm (0.2 in) wide bead of sealant, Part
No. STC 50550, across the cylinder block to
front cover joint and across the cylinder block to
rear main bearing joint. Apply a globule of
sealant to cover the ends of the cruciform
seals, (see illustration).
4.Fit new gasket, dry, to sump, ensuring that
locating tags are correctly positioned.
5.Manoeuvre sump into position, fit and lightly
tighten 2 bolts to retain sump in place, then fit
and lightly tighten remainder of bolts.
6.Working in the sequence illustrated, tighten the
sump bolts to 22 Nm (16 lbf.ft).
7.Position side clip bracket, fit and tighten bolt. 8.Position oil cooler pipe clips, fit and tighten
nuts.
9.Clean gearbox oil cooler pipe 'O' ring recess
and mating face.
10.Lubricate and fit new 'O' ring to gearbox oil
cooler pipe.
11.Position pipe and tighten nut.
12.Lower front of vehicle.
13.Position cross member to chassis, fit bolts and
tighten to 25 Nm (18 lbf.ft).
14.Refill engine oil and fit dipstick.
15.Connect battery earth lead.
16.Fit battery cover and retain with fixings.

ENGINE - V8
OVERHAUL 12-2-47
15.Remove 2 bolts securing manifold gasket and
collect gasket clamps.
16.Remove inlet manifold gasket.
17.Remove gasket seals.
Reassembly
1.Clean sealant from cylinder head and from
notches in the cylinder block.
2.Clean mating faces of cylinder block, cylinder
head and manifold.
CAUTION: Do not use a metal scraper or
machined surfaces may be damaged.
3.Ensure bolt holes are clean and dry.
4.Apply sealant, Part No. STC 50550 to cylinder
head and notches in cylinder block.
5.Fit new gasket seals, ensuring the ends
engage correctly in notches.
6.Apply sealant, Part No. STC 50550 to gasket
seals above the notches in the cylinder block.
7.Fit new manifold gasket, dry.
8.Position gasket clamps, fit and lightly tighten
bolts.
9.Position inlet manifold assembly to cylinder
head. 10.Fit manifold bolts and, working in the sequence
illustrated, tighten as follows:
lInitially, tighten bolts numbered 1, 4, 9 and
12 in numerical order to 5 Nm (4 lbf.ft).
lInlet manifold bolts - initial tighten = 10 Nm
(8 lbf.ft).
lInlet manifold bolts - final tighten = 51 Nm
(38 lbf.ft).
lTighten inlet manifold gasket clamp bolts to
18 Nm (14 lbf.ft).
lTighten inlet manifold bolts to 51 Nm (38
lbf.ft)
11.Clean mating faces of rocker cover and cylinder
head, ensure that bolt holes are clean and dry.
12.Fit new rocker cover gaskets, dry, position
rocker covers, ensuring gaskets are correctly
located.
13.Fit new 'patched' multi-hex rocker cover bolts
ensuring that short bolts are on sides of rocker
coves nearest centre of engine.
14.Tighten bolts by diagonal selection to:
lStage 1 - 3 Nm (2.5 lbf.ft)
lStage 2 - 8 Nm (6 lbf.ft)
15.Ensure that outer rim of each gasket is correctly
positioned around periphery of rocker cover.
16.Secure ht leads to rocker cover.
17.Clean coolant outlet elbow mating faces.
18.Lubricate and fit new 'O' ring to outlet pipe.
19.Position coolant outlet elbow, fit bolts and
tighten to 22 Nm (17 lbf.ft).
20.Position alternator, fit mounting bolts and
tighten to 45 Nm (34 lbf.ft).

ENGINE - V8
OVERHAUL 12-2-61
Gasket - cylinder head
$% 12.29.02.01
Disassembly
1.Remove inlet manifold gasket.

+ ENGINE - V8, OVERHAUL, Gasket -
inlet manifold.
2. RH cylinder head: Remove auxiliary drive belt
tensioner.
3. RH cylinder head: Remove bolts securing
alternator mounting bracket and remove
bracket.
4.Noting their fitted order, disconnect ht leads
from spark plugs.
5.Progressively remove 4 bolts securing the
rocker shaft and remove rocker shaft.
6.Remove push rods and store in their fitted
order. 7. Models with SAI: Using a 9 mm hexagonal
drive bit, remove 2 air injection adapters from
cylinder head; discard adapters.
To release the adapter thread locking agent
and prevent damage to the cylinder head,
remove the adapters by alternately loosening
then tightening slightly. Repeat this procedure
until adapters are removed.
CAUTION: Do not use air tools to remove
adapters.
8.Working in the sequence shown remove 10
bolts securing the cylinder head to block.
Discard the bolts.
9.Remove cylinder head.

ENGINE - V8
12-2-62 OVERHAUL
10.Remove cylinder head gasket.
CAUTION: Support both ends of cylinder
head on blocks of wood.
Inspect
1.Clean mating faces of cylinder block and head
using suitable gasket removal spray and a
plastic scraper, ensure that bolt holes in block
are clean and dry.
CAUTION: Do not use a metal scraper or
machined surfaces may be damaged.
2.Check head and block faces for warping and
pitting.
lMaximum cylinder head warp = 0.05 mm
(0.002 in).
Note: Cylinder head can be refaced to 0.50
mm (0.02 in) maximum below head height –
See cylinder head overhaul.
3. Models with SAI: Using a 5/8 in x 20 TPI (
threads per inch) UNF tap having a class 2A
thread, remove deposits from secondary air
injection adapter tappings in cylinder head.
CAUTION: Ensure that tap used has 20 TPI.Reassembly
1.Ensure that cylinder head bolt holes are clean
and dry.
2.Fit cylinder head gasket with the word TOP
uppermost.
CAUTION: Gaskets must be fitted dry.
3.Carefully fit cylinder head and locate on
dowels.
4.Lightly lubricate new cylinder head bolt threads
with clean engine oil.
5.Noting that bolts 1, 3 and 5 are longer than the
remainder, fit bolts and tighten in the sequence
shown to 20 Nm (15 lbf.ft) then turn through 90
°, then a further 90 °. CAUTION: Do not
tighten bolts 180° in one operation.
6. Models with SAI: Fit new air injection adapters
and using a 9 mm hexagonal drive bit, tighten
to 33 Nm (24 lbf.ft).
CAUTION: Do not use an air tool to tighten
adapters.
7.Clean the push rods, Lubricate ends of push
rods with clean engine oil, and fit in their
removed order.
8.Clean bases of rocker pillars and mating faces
on cylinder head.
9.Clean contact surfaces on rockers, valves and
push rods.
10.Lubricate contact surfaces and rocker shaft
with clean engine oil.
11.Fit rocker shaft assembly and engage push
rods.
12.Fit rocker shaft bolts and progressively tighten
to 40 Nm (30 lbf.ft).
13.Connect ht leads to spark plugs in their correct
fitted order.
14. RH cylinder head: Position alternator
mounting bracket, fit bolts and tighten to 40 Nm
(30 lbf.ft).
15. RH cylinder head: Fit auxiliary drive belt
tensioner.
16.Fit inlet manifold gasket.

+ ENGINE - V8, OVERHAUL, Gasket -
inlet manifold.

ENGINE - V8
OVERHAUL 12-2-67
35. Check that cutter blades are adjusted so that
middle of blade contacts area of material to be
cut. Use light pressure and only remove the
minimum of material necessary.
36.Clean valve seat and valve.
Reassembly
1.Clean spring caps, collets and valve springs.
2.Lubricate new valve stem oil seal with clean
engine oil and fit seal.
3.Lubricate valve with clean engine oil and fit
valve.
4.Fit spring and cap, compress spring using tool
LRT-12-034 and fit collets.
5.Release valve spring and remove tool LRT-12-
034.
6.Fit cylinder head gasket.

+ ENGINE - V8, OVERHAUL, Gasket -
cylinder head.
Piston assemblies
$% 12.17.02.01
Disassembly
1.Remove cylinder head.

+ ENGINE - V8, OVERHAUL, Gasket -
cylinder head.
2.Remove oil pick-up strainer.

+ ENGINE - V8, OVERHAUL, Strainer
- oil pick-up.
3.Suitably identify each connecting rod and
piston assembly to its respective cylinder bore.
4.Remove 2 bolts securing each connecting rod
bearing cap.
5.Remove connecting rod bearing cap and
collect connecting rod bearings.
6.Remove ridge of carbon from top of cylinder
bores.
7.Carefully push each piston assembly from the
top of the cylinder.
CAUTION: Ensure that connecting rods do
not contact cylinder bores.
8.Refit bearing cap onto connecting rod, lightly
tighten dowel bolts.
9.Suitably identify each piston to its respective
connecting rod.

ENGINE - V8
12-2-72 OVERHAUL
Bearings - connecting rods
$% 12.17.16.01
Disassembly
1.Remove oil pick up strainer.

+ ENGINE - V8, OVERHAUL, Strainer
- oil pick-up.
2.Suitably mark cylinder reference number on
each connecting rod bearing cap.
3.Remove 2 bolts securing each connecting rod
bearing cap, remove caps and recover
connecting rod bearings.
CAUTION: Keep bearing caps, bearings and
bolts in their fitted order.
4.Push each connecting rod up cylinder bore
until connecting rods are clear of crankshaft
journals.
CAUTION: Ensure that connecting rods do
not contact cylinder bores.
5.Remove bearing shells from each connecting
rod. Inspect
1.Clean crankshaft journals and bearing
locations in connecting rods.
2.Inspect connecting rod bearings for wear and
renew if necessary. Connecting rod bearings
are available in two oversizes.
lConnecting rod bearing 1st oversize = 0.254
mm (0.01 in).
lConnecting rod bearing 2nd oversize =
0.508 mm (0.02 in).
3.Check crankshaft big-end journals for wear and
scoring. Measure for ovality; taking 3
measurements at 120° intervals at each end
and at centre of journals.
lStandard journal = 55.500 to 55.513 mm
(2.20 to 2.22 in).
l1st undersize journal - 0.254 mm (0.01 in) =
55.246 to 55.259 mm (2.17 to 2.18 in).
l2nd undersize journal - 0.508 mm (0.02 in)
= 54.992 to 55.005 mm (2.16 to 2.165 in).
lJournal - max. ovality = 0.040 mm (0.002 in)
Reassembly
1.Clean connecting rod caps.
2.Lubricate connecting rod journals and bearing
shells with clean engine oil.
3.Fit bearing shells to connecting rods and caps.
4.Rotate crankshaft until connecting rod journals
are correctly positioned.
5.Taking care not to displace bearing shells, pull
connecting rods on to crankshaft journals.
6.Check that bearing shells are correctly located
in connecting rod bearing caps.
7.Fit connecting rod bearing caps, ensuring that
they are in their correct fitted order.
NOTE: The rib on the edge of the bearing cap
must face towards the front of engine on the RH
bank of cylinders and towards the rear on the
LH bank.
8.Lightly oil threads of connecting rod bolts. Fit
connecting rod bolts and tighten to 20 Nm (15
lbf.ft) then turn a further 80°.

ENGINE - V8
OVERHAUL 12-2-75
Reassembly
1.Clean main bearing locations in cylinder block
and bearing caps; ensure bolt holes are clean
and dry.
2.Clean sealant from rear main bearing cap and
mating faces.
3.Fit key to keyway.
4.Check threads of main bearing cap bolts for
damage, renew bolts in pairs.
5.Lubricate grooved main bearing shells with
clean engine oil and fit to their locations in
cylinder block.
NOTE: Ensure that the flanged bearing is fitted
to the centre position.
6.Lubricate crankshaft journals with clean engine
oil.
7.Position crankshaft in cylinder block.
8.Lubricate plain bearing shells with clean
engine oil and fit to main bearing caps.
9.Fit main bearing caps 1 to 4 only at this stage,
ensuring that they are the correct way round
and in their fitted order.
10.Lightly lubricate threads of main bearing cap
bolts with clean engine oil.
11.Fit main bearing cap bolts but do not tighten at
this stage. Do not fit side bolts at this stage.12.Lubricate new cruciform seals with engine oil
and fit to rear main bearing cap.
CAUTION: Do not trim off excess from
cruciform seals at this stage.
13.Apply a 3 mm (0.12 in) wide bead of sealant,
Part No. STC 50550 to bearing cap rear mating
faces on cylinder block.
CAUTION: Ensure sealant does not enter
bolt holes.
14.Carefully fit rear main bearing cap assembly, fit
but do not tighten bolts.
CAUTION: Ensure engine oil does not enter
the side bolt holes in the bearing cap. Do
not trim off excess material from cruciform
seals at this stage.
15.Lubricate 'Dowty' washers with engine oil and
fit to side bolts.
16.Fit but do not tighten side bolts. Rear side
bolts are Allen headed.
17.Using the sequence shown, tighten main
bearing cap bolts as follows:
lInitial torque - all main bearing cap bolts and
side bolts - 13.5 Nm (10 lbf.ft).
lFinal torque - main bearing cap side bolts 11
to 15 - 45 Nm (34 lbf.ft).
lFinal torque - main bearing cap bolts 1 to 8
- 72 Nm (54 lbf.ft).
lFinal torque - main bearing cap bolts 9 and
10 - 92 Nm (68 lbf.ft).
lFinal torque - main bearing cap side bolts 16
to 20 - 45 Nm (34 lbf.ft).
18.Trim off excess material from cruciform seals.

ENGINE - V8
OVERHAUL 12-2-77
Camshaft
$% 12.13.02.01
Disassembly
1.Remove inlet manifold gasket.

+ ENGINE - V8, OVERHAUL, Gasket -
inlet manifold.
2.Progressively loosen and remove 8 bolts
securing rocker shaft assemblies.
3.Mark each rocker shaft in relation to original
head.
4.Remove rocker shaft assemblies.
5.Remove push rods and store in their fitted
order.
6.Remove tappets.
CAUTION: Store tappets upright and in their
fitted order.
7.Remove timing chain and gears.

+ ENGINE - V8, OVERHAUL, Timing
chain and gears.8.Temporarily fit camshaft gear and lightly tighten
bolt.
9. Attach a dial test indicator (DTI) to front of
cylinder block with stylus of DTI contacting
camshaft gear.
10.Push camshaft rearwards and zero the DTI.
11.Using the camshaft gear, pull camshaft
forwards and note reading on DTI. End-float
should be from 0.075 to 0.25 mm (0.003 to
0.010 in).
12.If end-float is incorrect, fit a new thrust plate. If
end-float is still incorrect, a new camshaft/gear
must be fitted.
13.Remove camshaft bolt and gear.
14.Remove 2 bolts securing camshaft thrust plate
and remove thrust plate.
15.Carefully remove the camshaft avoiding
damage to the camshaft bearings.