Land Rover Defender 90 110 130 Workshop 1997 Rover Manual

Workshop maintenance 
Air cleaner dump valve check -all engines 
The dump valve (B) is situated on the 
underside of the element housing. 
• Squeeze open the dump valve (as 
illustration) and check that the interior is 
clean. Renew the valve if perished. 
139  

Workshop maintenance 
SPARK PLUG CHECK/RENEWAL 
(petrol engines) 
. J628 
VB engine 
• Remove the HT leads from the spark 
plugs. 
• Remove the plugs using a spark plug 
socket and ratchet. 
• If they are in poor condition, replace with 
new plugs of the correct specification (see 
General data). 
• Set the spark plug gaps to the correct 
setting (see General data). 
• Fit the spark plugs and washers -DO NOT 
OVERTIGHTEN. 
NOTE: Fitting incorrect grades of spark plug, 
may lead to piston overheating and...

Workshop maintenance 
DISTRIBUTOR 
VB engines 
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ALWAYS disconnect the battery negative 
lead before carrying out any maintenance on 
the ignition and electrical systems. 
The internal operating parts of the distributor 
are protected by a plastic insulating cover (1) 
and are pre-set during manufacture -they do 
not require maintenance....

Workshop maintenance 
DRIVE BELTS 
Driving belt tension 
All pulleys and belts should be examined 
regularly for any damage, deterioration or 
fouling (grit, mud, oil etc). Replace or clean 
where necessary. 
After every off-road session, the drive belts 
should be inspected for cuts and possible 
damage caused by stones. If a belt has 
jumped, reposition it correctly and, if 
necessary, replace it at the earliest 
opportunity....

Workshop maintenance 
AlTERNATOR DRIVE BELT 
VB engine (without air-conditioning) 
Check the belt deflection with thumb pressure, 
mid-way between the alternator and 
crankshaft pulleys. Movement should be 
approximately 12 mm (0.5 in). If adjustment 
is necessary; 
• Turn the starter switch to position 0 and 
disconnect the battery negative lead. 
• Loosen bolts (2}. 
• Loosen the adjustment bolts (3). 
• Pivot the alternator away from, or towards 
the engine, to increase, or reduce tension. 
• Tighten...

Workshop maintenance 
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DO NOT use a lever to move the alternator. 
ONLY apply hand pressure to the alternator 
body when adjusting drive belt tension. 
• Tighten the adjustment link clamp and 
pivot bolts (2). 
• Tighten the alternator pivot bolts {3). 
• Connect the battery, run the engine for five 
minutes at a fast idle and then switch off. 
• Re-check belt tension. 
144  

Workshop maintenance 
POWER STEERING PUMP DRIVE BELT 
VB engine 
(without air-conditioning) 
Check belt deflection with thumb pressure 
mid-way between the crankshaft and steering 
pump pulley. Movement should be between 4 
and 6 mm (0.16 and 0.25 in). If adjustment is 
necessary: 
• Tum the starter switch to position ·a· and 
disconnect the battery negative lead. 
• Slacken the two pivot bolts (2). 
• Slacken the pump adjustment clamp bolt 
(3). 
• Move the pump in the required direction to 
obtain the...

Workshop maintenance 
POWER STEERING PUMP DRIVE BELT 
VB engine 
(with air -conditioning) 
Check the belt deflection with thumb pressure, 
mid-way between the crankshaft and steering 
pump pulleys. Movement should be between 
4 and 6 mm (0.16 and 0.25 in). If adjustment 
is necessary; 
• Turn the starter switch to position 0 and 
disconnect the battery negative lead. 
• Slacken the alternator adjustment link 
clamp and pivot bolts (2) (see Alternator 
drive belt -VB engine with 
air -conditioning). 
•...

Workshop maintenance 
AIR CONDITIONING COMPRESSOR 
DRIVE BELT 
Tdi engine 
Correct belt tension an only be achieved using 
a suitably calibrated torque meter. 
• Slacken the 3 bolts (1) securing the 
tensioner. 
• Apply a clockwise torque of 35 Nm to the 
square drive (2) of the tensioner and 
tighten the bolts to 25 Nm. 
147  

Workshop maintenance 
AIR CONDITIONING COMPRESSOR 
DRIVE BELT 
VB engine 
Check the belt deflection with thumb pressure, 
mid-way between the compressor and 
fan/water pump pulley. Movement should be 
approximately 4 mm to 6 mm (0.16 to 0.25 
in). If adjustment is necessary; 
J640. 
• Turn the starter switch to position ·o· and 
disconnect the battery negative lead. 
• Slacken the two compressor mounting 
bracket clamp bolts (3). 
• Slacken the pivot bolt (4) in the centre of 
the bracket. 
• Move the...