Land Rover Defender 90 110 130 Workshop 1997 Rover Manual

							Workshop maintenance 
ENGINE UNDERTRA Y 
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. 
129 
• Remove the four bolts securing the 
propeller 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 
(101bf/ft). Tighten the bolts securing the 
propeller shaft to the frontaxle to a torque 
rating of 47 Nm {35 lbf/ft).  
						

							Workshop maintenance 
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 {1 0 lbf/ft). 
130  
						

							Workshop maintenance 
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 (1 0 
lbf/ft). 
131 
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 
ENGINE OIL RENEWAL (all engines) 
NOTE: For engine oil check & top-up see 
Owner maintenance·. 
~~~~~~~~~l~~~~l~~~~~~~~J.~~~~~~~~~~~~l~~~~~li~I~I4·~~~[~J~~~~[~~~l~~~~~ll~~[[~~[~~l~l~t~l~~~~~i 
DO NOT anempt 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. 
VB engine 
Tdi engine 
132 
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 ·o· 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 
VB 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. 
133 
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 VB engines, to minimise the risk of 
draining the oil pump, ensure that the oil is at 
the correct operating level before removing 
the filter. 
• Tum the starter switch to position ·o· 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 
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). 
• Tum the starter switch to position 0 and 
disconnect the battery negative lead. 
NOTE: On 7 70 models the fuel filter is located 
behind a protective cover (as illustrated 
above). To remove the cover, unscrew the 
three bolts (1). 
134 
• 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 
Tdi engine 
• Turn the starter switch to position ·a· and 
disconnect the battery negative lead. 
2------:--
J738 
• 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. 
135  
						

							Workshop maintenance 
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 ·o· 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. 
136 
• 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 
AIR CLEANER ELEMENT RENEWAL 
VB 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). 
137 
• 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 (B) (see Air 
cleaner dump valve check?.  
						

							Workshop maintenance 
Tdi engine 
Engine performance will be seriously 
affected if the air cleaner element becomes 
choked with dust and other airborne 
particles. 
138 
• Release the two retaining clips {1). 
• Raise the air cleaner slightly from its 
cradle to improve access to the element. 
• Unscrew the wing nut (2) and remove the 
end cover. 
• Unscrew the wing nut (3) and withdraw 
the element. 
• Clean the interior and exterior of the 
casing and cover. 
• Fit a new element, seal first, into the 
casing. 
• Secure the element with the wing nut. 
• Fit the end cover and align the two arrows 
(4). 
• Position the air ciP.aner in its mounting 
cradle and secure the two clips (1 ).