Land Rover Defender Owners Handbook Rover

							Workshop maintenance
128 Poisonous liquids
Most liquids and lubricants used in motor
vehicles are poisonous and should not be
consumed or brought into contact with open
wounds. These include; battery acid,
anti-freeze, brake, clutch and power steering
fluid, as well as petrol, diesel, engine oil and
windscreen washer additives.
For your own safety, ALWAYS read and obey
all instructions printed on labels and
containers.
Used engine oil
Prolonged contact with engine oil can cause
serious skin disorders, including dermatitis
and skin cancer. ALWAYS wash thoroughly
after contact.
It is illegal to pollute drains, water courses or
soil with toxic chemicals such as used engine
oil. ALWAYS dispose of vehicle liquids and
lubricants at authorised waste disposal sites,
or at garages which provide facilities for the
receipt of discharged batteries, used engine
oil and toxic chemicals. If in doubt, contact
your Local Authority for advice.
PROTECT THE ENVIRONMENT! 
						

							Workshop maintenance
129 ENGINE UNDERTRAY
Undertray removal
Front section:
The front undertray (1) can be removed to
gain access to the engine oil filter.
·Raise the vehicle on a ramp and position a
suitable support under the chassis front
crossmember.
·Lower the ramp slightly to improve
clearance between the axle and the
undertray.
·Remove the four bolts securing the
propellor shaft to the front axle and
reposition the shaft to prevent it from
fouling the undertray during removal.
·Remove the two bolts (2) securing the
undertray to the front crossmember.
·Remove the two nuts (3) securing the
undertray to the bump stop front fixing
bolts, on either side of the vehicle.
·Remove the two bolts (4) securing the
front and rear undertray together.
·Lower the undertray until it clears the
steering box and pull rearwards over the
axle to remove.
Refitting the undertray is the reverse of the
removal procedure, but take care to ensure
that the flanges of the undertray are properly
located in the rear undertray. Tighten the bolts
(2, 3 & 4) to a torque rating of 14 Nm
(10lbf/ft). Tighten the bolts securing the
propeller shaft to the frontaxle to a torque
rating of 47 Nm (35 lbf/ft). 
						

							Workshop maintenance
130 Undertray removal
Rear section:
The rear undertray (1) can be removed to
enable access to the gearbox drain and filler
level plugs.
·Raise the vehicle on a ramp.
·Remove the two bolts (2) securing the
rear and front undertray together.
·Remove the two bolts (3) securing the
rear undertray to the chassis
crossmember.
·Remove the bolt (4) securing the
undertray to the right hand side of the
chassis.
·Pull the undertray rearwards to disengage
from the front undertray and remove.
Refitting the undertray is the reverse of the
removal procedure, but take care to ensure
that the flanges of the front undertray are
properly located. Tighten the bolts (2, 3, & 4)
to a torque rating of 14 Nm (10 lbf/ft). 
						

							Workshop maintenance
131 UNDERTRAY ACCESS PANELS
Front:
The front access panel can be removed in
order to fit the engine timing cover wading
plug.
·Remove the five bolts securing the front
access panel to the undertray and
withdraw the panel.
·When refitting the access panel, tighten
the bolts to a torque rating of 14 Nm (10
lbf/ft).
Rear:
The rear access panel can be removed in
order to fit the flywheel housing wading
plug and to access the engine oil drain
plug.
·Rotate the panel anti-clockwise to
disengage the locking flanges, then
withdraw the panel from the undertray. 
						

							Workshop maintenance
132 ENGINE OIL RENEWAL(all engines)
NOTE:For engine oil check & top-up see
Owner maintenance.
WARNING
DO NOT attempt to drain the engine sump if
the engine has been running for some time,
the engine oil will be hot and may cause
severe scalding.
V8 engine
Tdi engine
NOTE:On some models, to access the engine
oil drain plug, it will be necessary to remove
the rear undertray access panel - see Engine
undertray, earlier in this section.
With the vehicle resting on firm, level ground,
run the engine for a few minutes so that the
oil will drain more easily. Turn the starter
switch to position 0 and disconnect the
battery negative lead.
Remove the oil filler cap and position a
suitable container under the oil drain plug (4)
to collect the used oil.
Remove the drain plug and its washer and
allow the oil to drain completely.
NOTE:If, by necessity, this procedure is
being carried out in dusty or sandy
conditions, refit the drain plug as soon as the
main bulk of the oil has drained.
When the sump has fully drained, clean the
draining plug and the surrounding area of the
sump and refit with a new copper washer.
Refill the sump with fresh oil of the correct
specification (see General data). Refit the
filler cap and let the vehicle stand for five
minutes to allow the oil to drain back into the
sump. Check the oil level using the dipstick
(as described in Owner maintenance) and top
up until the correct level is obtained.
·DO NOT use oil previously drained from
the engine.
·DO NOT OVERFILL! 
						

							Workshop maintenance
133
V8 engines
Tdi engines
NOTE:On some models, to remove the oil
filter, it may be necessary to remove the front
engine undertray - see Engine undertray,
earlier in this section.ENGINE OIL FILTER RENEWAL
To prevent any possibility of air locks in the oil
pump, it is recommended that filter renewal is
carried out AFTER the engine oil has been
changed.
NOTE:On V8 engines, to minimise the risk of
draining the oil pump, ensure that the oil is at
the correct operating level before removing
the filter.
·Turn the starter switch to position 0 and
disconnect the battery negative lead.
·Clean the area around the head of the
filter.
·Place a suitable container beneath the
filter.
·Using a strap wrench, unscrew the filter
(6) and discard it safely.
·Half fill the filter and smear the rubber
washer (7) of the new filter, with clean
engine oil of the correct specification (see
General data).
·Screw the filter on clockwise until the
rubber washer touches up against the
machined face, then tighten a further half
turn using hand pressure only. DO NOT
OVERTIGHTEN.
·Connect the battery negative lead and run
the engine at a fast idle for five minutes.
·Check the filter for leaks.
Stop the engine and let the vehicle stand for
five minutes to let the oil drain back into the
sump. Check the oil level (see Owner
maintenance) and top up if necessary. 
						

							Workshop maintenance
134 FUEL FILTER RENEWAL
Petrol engines
Before carrying out any work on the fuel
system, it is essential that you have read and
understood the precautions listed at the
beginning of the section (see Fuel system
safety).
The fuel filter is located next to the fuel pump
on the right hand side of the chassis (when
viewed from the rear).
·Turn the starter switch to position 0 and
disconnect the battery negative lead.
NOTE:On 110 models the fuel filter is located
behind a protective cover (as illustrated
above). To remove the cover, unscrew the
three bolts (1).
·Unscrew the centre bolt (2) and withdraw
the filter bowl (3).
·Remove the small sealing ring (4) and
withdraw the element (8).
·Remove the large sealing ring (5) and
discard the old element.
·Clean the filter bowl with clean fuel, ensure
the centre and top sealing rings (7) are in
good condition. Replace if necessary.
·Fit the new element (small hole
downwards) and refit the small and large
sealing rings (4 and 5).
·Replace filter bowl and tighten the centre
bolt.
·Connect the battery negative lead.
·Start the engine and check for leaks. 
						

							Workshop maintenance
135 Tdi engine
·Turn the starter switch to position 0 and
disconnect the battery negative lead.
·Clean the area around the filter head (1)
and place a container under the filter.
·Using a strap wrench, unscrew the filter
(2) and catch the fuel released in the
container.
·Wet the seal of the new filter (3) with
diesel fuel and screw the filter into
position and tighten.
·Ensure that the drain tap (4) at the base of
the filter is closed.
·Connect the battery negative lead.
·Start the engine and check for leaks. 
						

							Workshop maintenance
136 FUEL SEDIMENTER CLEANING
(diesel engines - if fitted)
NOTE:The fuel sedimenter should be drained
before removal; this process is covered in
Owner maintenance.
The fuel sedimenter is mounted on the
chassis rear side member, near the rear
wheel.
·Turn the starter switch to position 0 and
disconnect the battery negative lead.
·Disconnect the fuel inlet pipe from the
sedimenter and raise the pipe above the
level of the fuel tank. The pipe must be
kept at this level to prevent the tank from
draining.
·Whilst supporting the sedimenter bowl
(1), unscrew the bolt on the top of the unit
(2) and then remove the bowl.
·Remove the sedimenter element (3) and
clean all parts with kerosene.
·Fit new seals (4) and re-assemble the
sedimenter unit.
·Slacken off the drain plug (5) until pure
diesel is emitted, then re-tighten.
·If necessary, prime the system.
·Connect the battery negative lead.
·Start the engine and check the sedimenter
for leaks. 
						

							Workshop maintenance
137 AIR CLEANER ELEMENT RENEWAL
V8 engine
Engine performance will be seriously
affected if the air cleaner element becomes
choked with dust and other airborne
particles.
·Unscrew the two retaining nuts (1).
·Disconnect the air cleaner hose (2).
·Remove the engine breather hose (3).
·Withdraw the air cleaner canister (4).
·Unscrew the wing nut and washer (5).
·Remove the filter seal (6).
·Remove the element (7) from the canister.
·Discard the old element, DO NOT attempt
to clean it.
·Insert the new element and secure with
the wing nut and washer.
·Fit the air cleaner canister.
·Fit the breather hose.
·Fit the air cleaner hose.
·Secure with the retaining straps and nuts.
NOTE:Check the dump valve (8) (see Air
cleaner dump valve check).