2002 LAND ROVER DISCOVERY ground clearance

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LAND ROVER DISCOVERY 2002 Workshop Manual GENERAL DATA
04-18
Dimensions
* Measurement taken with vehicle at unladen weight.
Weights
NOTE: The rear axle load for vehicles with self levelling suspension can be increased to a maximum of 1928 kg

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LAND ROVER DISCOVERY 2002 Workshop Manual ENGINE - TD5
DESCRIPTION AND OPERATION 12-1-25
Inlet and exhaust valves
The inlet and exhaust valves are mounted directly above the engine block cylinders.
Each valve is a forged and ground solid one-

ENGINE - TD5
DESCRIPTION AND OPERATION 12-1-25
Inlet and exhaust valves
The inlet and exhaust valves are mounted directly above the engine block cylinders.
Each valve is a forged and ground solid one-piece head and stem which is hardened by heat treatment. The stems
are chrome-plated then ground for improved heat transfer, wear resistance and smooth operation. It is not possible
to recut the valve's face angle, but the valves can be lapped to their seats using grinding paste.
The valve springs are made from spring steel and are of the parallel single-coil type. The bottom end of the spring
rests on the flange of a spring seal which has a centre bore that locates on a recess ground into the lower valve stem.
The top end of the spring is held in place by a spring retainer which is held in position at the top end of the valve stem
by split taper collets. The taper collets have grooves on the internal bore that locate to grooves ground into the upper
stems of the valves.
The valve seats and valve guides are sintered and are interference fit into the cylinder head. The valve seats and
guides are non-serviceable.
Finger followers and Lash adjusters
1Valve stem
2Finger follower
3Lash adjuster plunger
4Oil supply hole
5Lash adjuster body
The valves are operated through finger followers and lash adjusters, actuated by the camshaft lobes. When the
camshaft lobe presses down on the top of a finger follower roller mechanism, the respective valve is forced down
opening the effected inlet or exhaust port.
The lash adjuster body contains a plunger and two chambers for oil feed and pressurised oil. Pressurised oil is
supplied to the lash adjusters via the oil galleries in the cylinder head and through a hole in the side of the lash adjuster
body. The oil passes into a feed chamber in the lash adjuster then through to a separate pressure chamber via a one
way ball valve. Oil flow from the pressure chamber is determined by the amount of clearance between the lash
adjuster outer body and the centre plunger, oil escapes up the side of the plunger every time the lash adjuster is
operated, the downward pressure on the plunger forcing a corresponding amount of oil in the lash adjuster body to
be displaced. When the downward pressure from the camshaft and finger follower is removed (i.e. after the trailing
flank of the camshaft lobe has passed), oil pressure forces the lash adjuster's plunger up again. This pressure is not
sufficient to affect the valve operation, but eliminates the clearance between the finger follower and top of the valve
stem.

Page 625 of 1672

LAND ROVER DISCOVERY 2002 Workshop Manual MANIFOLDS AND EXHAUST SYSTEMS - TD5
30-1-4 DESCRIPTION AND OPERATION
Front pipe assembly
The front pipe is of welded and fabricated tubular construction. The front pipe is connected to a flange on the

MANIFOLDS AND EXHAUST SYSTEMS - TD5
30-1-4 DESCRIPTION AND OPERATION
Front pipe assembly
The front pipe is of welded and fabricated tubular construction. The front pipe is connected to a flange on the
turbocharger and secured with three flanged nuts and sealed with a metal laminated gasket. The front pipe
incorporates a flexible pipe near the connection with the turbocharger and terminates in a flanged connection with the
intermediate pipe.
The flexible pipe is formed into a concertina shape with woven metal strands around its outer diameter. The flexible
pipe allows for ease of exhaust system alignment and also absorbs engine vibration. The woven metal strands also
increase the longevity of the flexible pipe.
The front pipe is attached via a bracket and a mounting rubber to the chassis. The mounting rubber allows ease of
alignment and vibration absorption.
Intermediate pipe and silencer
The intermediate pipe is of welded and fabricated tubular construction. It connects at its forward end to the front pipe
flange. Two captive studs on the intermediate pipe flange allow for attachment to the front pipe with locknuts. The rear
section of intermediate pipe connects to the tail pipe assembly via a flanged joint, sealed with a metal gasket and
secured with locknuts and studs.
The forward and rear sections are joined by a silencer. The silencer is fabricated from stainless steel sheet to form
the body of the silencer. An end plate closes each end of the silencer and is attached to the body with seam joints.
Perforated baffle tubes, inside the silencer, are connected to the inlet and outlet pipes on each end plate. Internal
baffle plates support the baffle tubes and, together with a stainless steel fibre packing, absorb combustion noise as
the exhaust gases pass through the silencer.
The intermediate pipe is attached by two brackets, positioned at each end of the silencer, and two mounting rubbers
to the chassis. The mounting rubber allows for ease of alignment and vibration absorption.
Tail pipe assembly
The tail pipe is of welded and fabricated construction. The tail pipe connects to the intermediate pipe with a flanged
joint secured with locknuts and sealed with a metal gasket. The pipe is shaped to locate above the rear axle allowing
clearance for axle articulation. The pipe is also curved to clear the left hand side of the fuel tank which has a reflective
shield to protect the tank from heat generated from the pipe.
A fabricated silencer is located at the rear of the tail pipe. The silencer is circular in section and is constructed from
stainless steel sheet. A baffle tube is located inside the silencer and the space around the baffle tube is packed with
a stainless steel fibre. The holes in the baffle tube allow the packing to further reduce combustion noise from the
engine. The tail pipe from the silencer is curved downwards at the rear of the vehicle and directs exhaust gases
towards the ground. The curved pipe allows the exhaust gases to be dissipated by the airflow under the vehicle and
prevents the gases from being drawn behind the vehicle.
The tail pipe is attached by a bracket, positioned forward of the silencer, and a mounting rubber to the chassis. The
mounting rubber allows ease of alignment and vibration absorption.

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LAND ROVER DISCOVERY 2002 Workshop Manual MANIFOLDS AND EXHAUST SYSTEMS - V8
DESCRIPTION AND OPERATION 30-2-7
Tail pipe assembly
The tail pipe is of welded and fabricated construction. It connects to the intermediate pipe with a flanged joint

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