Land Rover Lesson 2 Auto Trans Coolingine Rover Manual

Crankshaft and Main Bearings
Crankshaft1
Thrust washer2
Thrust washer3
Main bearings - upper4
Six counter-balance weights ensure good vibration levels
from the four throw, five bearing crankshaft.
Manufactured in cast iron, the crankshaft also has
undercut and rolled fillets for improved strength.
The crankshaft rear oil seal is a press fit in the bedplate
to cylinder block interface.
The main bearings are aluminium/tin split plain
bearings. An oil groove in the upper half of each bearing
transfers the...

the connecting rod bearings. A aluminium/tin thrust
washer is installed each side of the top half of the centre
main bearing.
Bedplate
The bedplate is a structural casting bolted to the bottom
of the cylinder block to retain the crankshaft. The use
of a bedplate further improves rigidity. Iron inserts, cast
into the main bearing supports of the bedplate, minimise
main bearing clearance changes due to heat expansion.
Two hollow dowels align the bedplate with the cylinder
block.
Beads of sealant seal the...

Sump
The aluminium alloy structural sump is bolted to the
bedplate. A windage tray attached to the underside of
the bedplate isolates the oil pan from the disturbed air
produced by the rotation of the crankshaft, to prevent
oil aeration and improve oil drainage. A rubber plug at
the rear of the structural sump seals the port that
provides access to the torque converter securing bolts.
The engine oil drain plug is located at the front right
corner of the oil pan.
A bead of sealant seals the joint between...

Starter Drive Plate
Starter drive plate1Bolt2
The starter drive plate is attached to the rear of the
crankshaft. A timing disc, for the engine speed sensor,
is spot welded to the front face of the drive plate.
EngineLesson 2 – Powertrain
65Technical Training (G421094) 

Timing Disc
(G421094) Technical Training66
Lesson 2 – PowertrainEngine 

CAMSHAFT TIMING COMPONENTS
Secondary chain tensioner1Secondary chain2
EngineLesson 2 – Powertrain
67Technical Training (G421094) 

Variable valve timing unit3
Primary chain4
Primary chain tensioner5
Timing Gear
Multiple link primary and single row secondary chains
drive the camshafts of each cylinder bank. The primary
chains transmit the drive from two sprockets on the
crankshaft to variable valve timing units on the intake
camshafts. The secondary chains transmit the drive from
the variable valve-timing units to sprockets on the
exhaust camshafts.
A key locates the two drive sprockets on the crankshaft.
The crankshafts torsional...

CYLINDER HEAD COMPONENTS
Camshaft bearing cap1Tappet (shimless)2
EngineLesson 2 – Powertrain
69Technical Training (G421094) 

Collet3
Valve spring cap4
Valve spring5
Valve stem oil seal6
Valve7
Inlet camshaft8
Exhaust camshaft9
Cylinder Heads
The cylinder heads are unique to each cylinder bank.
Deep-seated bolts, to reduce distortion, secure the
cylinder heads to the cylinder block. Two hollow dowels
align each cylinder head with the cylinder block.
The 14 mm spark plugs, one per cylinder, locate in
recesses down the centre line of each cylinder head.
The engine-lifting eyes are bolted to the cylinder heads;
two on the rear...

Silicon rubber in-groove gaskets seal the joints between
the camshaft covers and the cylinder heads. Together
with spacers and seals on the camshaft cover fasteners,
they also isolate the covers from direct contact with the
cylinder heads, to reduce noise.
Cylinder Head Gasket
The multi-layered steel cylinder head gasket has cylinder
specific water flow cross-sections for uniform coolant
flow.
Camshafts
The camshafts are manufactured in chilled cast iron.
Five aluminium alloy caps retain each camshaft....