1995 LAND ROVER DISCOVERY coolant

12ENGINE
6
REPAIR CRANKSHAFT PULLEY
Service repair no - 12.21.01
Remove
1.Disconnect battery negative lead.
2.Drain coolant.
3.Remove top hose from radiator.
4.Remove intercooler to induction manifold hose.
5.Remove viscous fan and coupling.
See
COOLING SYSTEM, Repair, Viscous
Coupling, Fan Blades, Pulley and Fan Cowl
6.Remove fan cowl.
7.Remove drive belt.
See Drive Belt Renew
8.Fit crankshaft pulley retainer LRT-12-080 and
secure with four bolts.
9.Remove crankshaft pulley retaining bolt using
socket and suitable long bar.
10.Remove pulley retainer.
11.Remove pulley, if necessary using extractor
LRT-12-049 with thrust pad from LRT-12-031.Refit
12.Refit in reverse order, lightly greasing pulley
spigot. Tighten to
80 Nm + 90°.

Tdi
7
REPAIR FRONT COVER PLATE
Service repair no - 12.65.01
Remove
1.Disconnect battery negative lead.
2.Drain coolant.
3.Remove top hose from radiator.
4.Remove inter-cooler to induction manifold hose.
5.Remove viscous coupling and fan.
See
COOLING SYSTEM, Repair, Viscous
Coupling, Fan Blades, Pulley and Fan Cowl
6.Remove fan cowl.
7.Remove drive belt.
See Drive Belt Renew
8.Remove crankshaft pulley.See Crankshaft
Pulley
9.Remove 14 bolts securing front cover plate,
noting top two bolts also retain thermostat hose
clips.
10.Remove cover plate complete with gasket.
11.Remove small gasket from centre bolt boss.
Seal replacement
12.Remove worn seal from cover and clean recess.
13.Support cover and fit new seal, open side fitted
into recess, using special tool LRT-12-077.
Refit
14.Refit in reverse order to removal using new
gaskets, fitting the securing bolts as shown in
illustration ST3475. Tighten to
25 Nm.

12ENGINE
20
REPAIR CYLINDER HEAD GASKET
Service repair no - 12.29.02
Remove
1.Disconnect battery negative lead.
2.Remove bonnet [Hood].
See CHASSIS AND
BODY, Repair, Bonnet [Hood]
3.Drain coolant.
4.Remove air cleaner assembly.
See FUEL
SYSTEM, Repair, Air Cleaner
5.Detach crankcase ventilation valve and side
breather hose from rocker cover and move to
one side.
6.Remove injection pipes.
7.Disconnect spill rail from fuel injectors.
8.Remove fuel injectors and sealing washers.
Identify each injector to the location from which it
is removed.
See FUEL SYSTEM, Repair,
Injectors
9.Remove inter-connecting harness from glow
plugs.
10.Remove glow plugs.
See FUEL SYSTEM,
Repair, Glow Plugs
11.Remove top hose, radiator to thermostat.
12.Disconnect by-pass hose from thermostat.
13.Disconnect hose, thermostat to water pump.
14.Disconnect water temperature sensor lead.
15.Remove hose inter-cooler to induction manifold.
16.Remove induction manifold.
See MANIFOLD
AND EXHAUST SYSTEM, Repair, Exhaust
Manifold - Tdi
17.Remove exhaust manifold and turbocharger
assembly.
See MANIFOLD AND EXHAUST
SYSTEM, Repair, Exhaust Manifold - Tdi
18.Disconnect heater hose from water pump and
move heater rail aside.
19.Disconnect heater hose from rear of cylinder
head.
20.Remove bolt securing air cleaner mounting
bracket to support strut.
21.Remove bolt securing harness bracket to
cylinder head.
22.Remove rear lifting bracket, this will also release
clips securing transmission and engine breather
pipes and multiplug. Note loose spacer under
clip securing engine breather pipe and multiplug.

12ENGINE
2
DESCRIPTION AND OPERATION
1. Cylinder block
2. Pistons and gudgeon pins (8)
3. Connecting rods (8)
4. Core plugs
5. Camshaft
6. Dipstick
7. Camshaft key
8. Timing chain
9. Camshaft sprocket
10. Distance piece
11. Distributor drive gear
12. Distributor
13. Front cover
14. Front cover oil seal
15. Coolant pump
16. Crankshaft damper / pulley17. Crankshaft sprocket
18. Crankshaft sprocket key
19. Crankshaft
20. Centre main bearing shells (2)
21. Crankshaft rear oil seal
22. Spacer
23. Adaptor plate
24. Rear main bearing cap, shell and side seals
25. Connecting rod caps
26. Main bearing caps and shell bearings
27. Oil filter
28. Oil pump suction pipe/strainer
29. Oil sump
30. Oil sump drain plug
31. Oil pump drive key

12ENGINE
4
DESCRIPTION AND OPERATION Lubrication system
The V8i full flow lubrication system uses a gear type oil pump which is driven from the front of the crankshaft. The
oil pump gears are housed in the front cover and the pressure relief valve, warning light switch and filter are also
fitted to the front cover.
Oil drawn through the centrally located steel gauze strainer in the sump, is pumped under pressure through oil
cooler located in the lower half of the main coolant radiator. The cooled oil then passes through the filter, before
being distributed from the main gallery via drillings, to the various components in the engine.
Lubrication to the thrust side of the cylinders is by oil grooves machined in each connecting rod big end joint face,
which are timed to align with holes in the big end journals on the power and exhaust strokes.
Lubrication system
1. Oil to cooler
2. Oil from cooler

12ENGINE
4
REPAIR CYLINDER HEAD GASKETS - RENEW
Service repair no - 12.29.01
1.Drain cooling system.
See COOLING SYSTEM,
Adjustment, Coolant
2.Remove inlet manifold.See FUEL SYSTEM,
Repair, Intake Manifold
3.Remove generator.
4.If fitted, remove compressor.
See AIR
CONDITIONING, Repair, Compressor
5.Remove rocker shafts.See Rocker Shaft
Renew
6.Remove push rods.
7.Remove both exhaust manifolds.
See
MANIFOLD AND EXHAUST SYSTEM, Repair,
Exhaust Manifold - V8i
8.Remove air cleaner assembly.See FUEL
SYSTEM, Repair, Air Cleaner Assembly
9.Remove air flow sensor.See FUEL SYSTEM,
Repair, Air Flow Sensor
10.Remove ground leads from rear of left hand
cylinder head
11.Right hand cylinder head - remove breather pipe
from lifting bracket.
12.Loosen cylinder head bolts, reversing tightening
sequence.
13.Remove cylinder heads.
14.Remove cylinder head gaskets.
15.Clean exhaust mating faces.
16.Clean head and block faces.
17.Fit new cylinder head gaskets, word TOP
uppermost. DO NOT use sealant.
18.Oil cylinder bores.
19.Clean threads of head bolts and lightly oil.
20.Locate cylinder heads on block.
21.Locate cylinder head bolts in position illustrated.
96 mm long bolts - 2, 4, 6, 7, 8, 9, 10
66 mm long bolts - 1, 3, 5
NOTE: There are no bolts fitted in the four
lower holes in each cylinder head.
NOTE: Left hand cylinder head illustrated,
arrow points to front of vehicle.
22.Tighten bolts progressively in sequence, shown
to
20 Nmthen a further 180°±5°
23.Reverse removal procedure. 1 to 11.

V8i
5
REPAIR CYLINDER HEADS - RENEW
Service repair no - 12.29.15
1.Remove cylinder heads and gaskets.
See
Cylinder Head Gaskets - Renew
2.Remove spark plugs.
3.Using spring compressor LRT-12-034, remove
seals, valves, collets, springs and caps.
CAUTION: Keep components in fitted
order
4.From left hand cylinder head, remove earth lead
studs.
5.Remove three bolts securing power steering
pump mounting bracket to cylinder head.
6.Remove four bolts securing generator mounting
bracket to cylinder head.
7.Right hand cylinder head, remove rear lifting
bracket.
8.Fit lifting bracket to new right hand cylinder
head.
9.Fit mounting brackets and earth lead studs to
new cylinder head. Tighten bolts to
30 Nm.
10.Regrind valves- refer to engine overhaul
publication
11.Lubricate valve stems, fit valves, springs, and
caps. Fit new inlet and exhaust valve stem seals.
12.Using spring compressor LRT-12-034, compress
springs, fit collets. Tap valve to check correct
collet seating.
13.Fit spark plugs.
14.Fit cylinder heads with new gaskets.
See
Cylinder Head Gaskets - Renew
ROCKER COVER - RIGHT HAND - RENEW
Service repair no - 12.29.41
1.Disconnect battery negative lead.
2.Disconnect purge pipe from charcoal canister at
plenum.
3.Remove breather pipe from rocker cover.
4.Remove coolant pipes from inlet manifold.
5.Remove spark plug leads from plugs and
retaining clips.
6.Remove four rocker cover bolts. Moving fuel
pipes aside, remove rocker cover.
7.Discard rocker cover gasket.
8.Remove plug lead retaining clips from rocker
cover, fit to new rocker cover.
9.Clean and dry rocker cover and cylinder head
mating faces, using Bostik cleaner 6001.
NOTE: Gasket fits one way round only. It
must be fitted accurately, first time.
Subsequent movement will destroy
bonding.
10.Apply Bostik 1775 impact adhesive to rocker
cover seal face and gasket, using a brush to
ensure an even film. Allow adhesive to become
touch dry.

12ENGINE
6
REPAIR 11.Place one end of gasket into cover recess with
edge firmly against recess wall, holding
remainder of gasket clear. Work around cover,
pressing gasket into place ensuring edge firmly
contacts recess wall.
12.Allow cover to stand for thirty minutes before
fitting.
13.Fit rocker cover to cylinder head with four
screws, short screws inboard, tighten to
9 Nm.
14.Position fuel pipes.
15.Fit breather pipe to rocker cover, tighten clip.
16.Fit coolant pipes to inlet manifold, tighten bolts.
17.Fit spark plug leads to plugs and retaining clips.
18.Connect purge pipe from charcoal canister at
plenum, tighten clip.
ROCKER COVER - LEFT HAND - RENEW
Service repair no - 12.29.40
1.Remove air flow sensor.
See FUEL SYSTEM,
Repair, Air Flow Sensor
2.Remove plenum chamber.See FUEL SYSTEM,
Repair, Plenum Chamber
3.Remove dipstick.
4.Remove spark plug leads from plugs and
retaining clips.
5.Disconnect HT lead from coil.
6.Remove generator heat shield securing nut from
rocker cover.
7.Remove air flow meter harness clip.
8.Remove bolt securing dipstick tube clip.
9.Remove four rocker cover bolts, remove rocker
cover.
10.Discard gasket
11.Remove plug lead retaining clips from rocker
cover, fit to new rocker cover.
12.Clean and dry rocker cover and cylinder head
mating faces, using Bostik cleaner 6001.
NOTE: Gasket fits one way round only. It
must be fitted accurately, first time.
Subsequent movement will destroy
bonding.
13.Apply Bostik 1775 impact adhesive to rocker
cover seal face and gasket, using a brush to
ensure an even film. Allow adhesive to become
touch dry, approximately fifteen minutes.
14.Place one end of gasket into cover recess with
edge firmly against recess wall, holding
remainder of gasket clear. Work around cover,
pressing gasket into place ensuring edge firmly
contacts recess wall.
15.Allow cover to stand for thirty minutes before
fitting.
16.Fit rocker cover to cylinder head with four
screws, short screws inboard. Tighten to
9 Nm.
17.Position dipstick tube clip. Fit and tighten bolts.
18.Fit and tighten air flow meter harness clip.
19.Fit generator heat shield to rocker cover.
20.Connect HT lead to coil.
21.Connect spark plug leads to plugs and retaining
clips.
22.Fit dipstick.
23.Fit plenum chamber.
24.Fit air flow meter.