1999 LAND ROVER DEFENDER ECU

MAINTENANCE
7
MAINTENANCE BRAKE PADS, CALIPERS AND DISCS
1.With front road wheels removed, check brake
pad thickness and ensure that both pads are
wearing evenly.
2.Check brake discs for signs of cracking,
excessive scoring or oil contamination.
NOTE: Any requirement to replace brake
pads or brake disc should be advised to
the customer as this will incur additional
labour and/or material cost and should not be
carried out without the authorisation of the
customer.
3.Check for any signs of brake fluid leakage from
caliper seals, hoses or unions.
4.Using brake cleaner, remove excessive deposits
of brake dust from pads, calipers and disc
shields.ROAD WHEEL SPEED SENSOR HARNESS - Td5
1.Check each sensor harness is correctly and
securely routed.
2.Inspect each harness for chafing or damage.
NOTE: Any requirement to replace a road
wheel speed sensor should be advised to
the customer as this will incur additional
labour and/or material cost and should not be
carried out without the authorisation of the
customer.
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MAINTENANCE
9
MAINTENANCE INTERCOOLER / COOLING SYSTEM
1.Visually check for any obstructions in the
radiator and intercooler matrix and remove
debris as necessary.
2.Visually check fan blades for damage.
3.Check cooling, intercooler and heating systems
for leaks, hoses and oil pipes for security and
condition.
4.Check accessible hose clips for tightness.
5.Check coolant level, top-up if necessary
Cooling System Top-Up
1.With engine cold, remove expansion tank filler
cap.
2.Top-up with recommended mixture of coolant
until level reaches mark on expansion tank.
3.Fit expansion tank filler cap.
Intercooler Flush
1.Remove intercooler.See FUEL SYSTEM,
Repair.
2.Flush intercooler element using Unicorn
Chemicals’C’Solve following the manufaturers
instructions.
3.Thoroughly dry intercooler ensuring that no trace
of solvent remains in the element.
4.Refit intercooler.See FUEL SYSTEM, Repair.AMBIENT AIR PRESSURE (AAP) SENSOR - Td5
1.Check ambient air pressure sensor for damage.
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10MAINTENANCE
10
MAINTENANCE DOOR LOCKS AND HINGES
Front, rear and tail doors
1.Open each door in turn and lubricate door
hinges and check strap using recommended
lubricant.
2.Lubricate door lock, striker and private lock using
PTFE lubricant. Remove excessive lubricant,
particularly from door striker area, to avoid
customer complaint.
3.Check tightness of accessible door lock and
striker fixings
4.Open and close door to check for smooth,
noise-free operation. Ensure door closes
securely.
5.Check for smooth operation of private lock.
Bonnet
1.With bonnet open, lubricate hinges, striker, lock
and safety catch using a suitable lubricant.ENGINE COOLANT
1.Renew engine coolant.See COOLING
SYSTEM, Adjustment.
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MAINTENANCE
19
MAINTENANCE PAS PIPES AND UNIONS
Check
1.Check PAS pipes for correct, secure routing and
signs of chafing.
2.Check for signs of fluid leakage from PAS pump,
hoses, and hose unions.ENGINE, GEARBOX, TRANSFER BOX AND AXLES
Check
1.Check for oil leaks from engine, gearbox, tansfer
box, and front and rear axles. Pay particular
attention to areas around oil seals.
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10MAINTENANCE
20
MAINTENANCE EXHAUST SYSTEM
1.Visually check condition of exhaust system for
signs of damage.
2.Check condition of exhaust heat shields.
3.Check exhaust system is firmly secured and
check condition of exhaust mounting rubbers,
clamps and brackets.STEERING BOX AND SUSPENSION
1.Check steering box fixings. Tighten if necessary
to81 Nm (60 lbf.ft).
2.Check LH and RH front radius arm fixings.
Tighten if necessary.See FRONT
SUSPENSION, Repair.
3.Check Panhard rod fixings. Tighten if necessary.
See FRONT SUSPENSION, Repair.
4.Check all rear axle fixings. Tighten if necessary.
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10MAINTENANCE
22
MAINTENANCE SHOCK ABSORBERS
1.Check for signs of leakage from suspension
dampers.
2.Check for signs of suspension damper damage.TOWING BRACKET
1.Check security of towing bracket.
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12ENGINE
22
DESCRIPTION AND OPERATION CRANKSHAFT, SUMP AND OIL PUMP
The crankshaft, sump and oil pump components are described below:
Sump
The sump is a wet-type, of aluminium construction and is sealed to the engine block by means of a rubber gasket
and twenty fixing bolts. The four bolts at the gearbox end of the sump are longer than the other sixteen bolts.
The sump gasket incorporates compression limiters (integrated metal sleeves) at the bolt holes, which are
included to prevent distortion of the gasket when the sump to cylinder block bolts are being tightened.
An oil drain plug is fitted at the bottom of the oil sump reservoir. An oil return drain pipe is also attached to the oil
sump which returns oil from the centrifugal filter.
Stiffener Plate
The stiffener plate assembly provides lower engine block rigidity and utilises dowels to align it to the bottom of the
cylinder block. A rotary oil pump is integral with the stiffener plate and an oil pick-up and strainer assembly is fitted
to the underside of the stiffener plate. The stiffener and oil pump assembly is secured to the cylinder block by 22
bolts.
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ENGINE
25
DESCRIPTION AND OPERATION CYLINDER HEAD COMPONENTS
The cylinder head components are described below:
Cylinder head
The cylinder head is of aluminium construction. It is not possible to reface the cylinder head if it becomes worn or
damaged. An alloy camshaft carrier is bolted directly to the upper surface of the cylinder head. Two dowels are
included in the cylinder head upper face for correct location of the camshaft carrier.
The EU3 cylinder head has a single internal fuel rail for delivering fuel to the injectors and an external fuel pipe for
returning spill fuel back to the fuel connector block. Therefore, pre EU3 and EU3 cylinder heads are not
interchangeable.
CAUTION: The cylinder head incorporates drillings for the fuel injection system, any
contamination which enters these drillings could cause engine running problems or injector
failure. It is therefore, essential that absolute cleanliness is maintained when carrying out work on
the cylinder head.
The camshaft carrier and cylinder head assembly is attached to the cylinder block by twelve cylinder head
retaining bolts which pass through the camshaft carrier and the cylinder head to secure the assembly to the
cylinder block.
CAUTION: The valve heads, tips of the injectors and glow plugs protrude below the face of the
cylinder head and will be damaged if the cylinder head is stored face down.
The camshaft is located between the cylinder head and the camshaft carrier, and the bearing journals are line
bored between the two components to form a matched pair.
CAUTION: Always fit plugs to open connections to prevent contamination.
The valve guides and valve seat inserts are sintered components which are an interference fit to the cylinder
head. The cylinder head machining also provide the locations for the electronic unit injectors, glow plugs, hydraulic
lash adjusters, finger followers and low pressure fuel rail.
Cooling to the cylinder head is provided by coolant flow through a water jacket machined into the cylinder head.
Drillings through the block provide lubrication channels for pressurised oil supply to cylinder head components
such as the lash adjusters, finger followers, rocker arms and camshaft bearings.
A coolant outlet elbow is fitted to the front LH side of the cylinder head to allow flow of coolant from the cylinder
head back to the radiator. A metal gasket is used to seal the joint between the water outlet elbow and the cylinder
head. A coolant temperature sensor is located in a port in the side of the water outlet elbow for monitoring coolant
temperature.
A stub pipe is connected at the front RH side of the cylinder block above the timing cover which connects a pipe to
supply oil to the vacuum pump. The timing chain tensioner adjuster is screwed in a thread in the cylinder head at a
location on the front RH side of the engine below the oil feed port for the vacuum pump.
An access hole for the camshaft gear is included at the front of the cylinder head which is sealed with a plastic
plug and rubber’O’ring. A press-fit core plug for the chain chest is located on the front face of the cylinder head.
A press-fit core plug for the cylinder head water jacket is located at the rear of the cylinder head and a threaded
brass plug for the water jacket is located on the LH side of the cylinder head beneath the exhaust manifold
assembly.
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