Land Rover 4 0 4 6 V8 Engine Overhaul 3rd Edition Rover Manual

ENGINE
2
DESCRIPTION AND OPERATION 

ENGINE
DESCRIPTION AND OPERATION3
CYLINDER BLOCK COMPONENTS
1.Cylinder block
2.Connecting rod
3.Piston and gudgeon pin
4.Core plugs
5.Camshaft
6.Dipstick
7.Camshaft Woodruff key
8.Timing chain
9.Camshaft sprocket
10.Thrust plate
11.Timing cover and oil pump assembly *
12.Oil pressure switch
13.Timing cover oil seal
14.Oil pressure relief valve assembly
15.Crankshaft sprocket
16.Oil filter
17.Timing cover gasket
18.Woodruff keys19.Crankshaft
20.Centre main bearing shell - upper
21.Crankshaft rear oil...

ENGINE
4
DESCRIPTION AND OPERATION 

ENGINE
DESCRIPTION AND OPERATION5
CYLINDER HEAD COMPONENTS
1.Cylinder head
2.Rocker cover
3.Rocker shaft spring
4.Rocker arm
5.Rocker shaft bracket
6.Pushrod
7.Tappet
8.Rocker shaft9.Inlet valve seal, spring, cap and collets
10.Exhaust valve seal, spring, cap and collets
11.Exhaust valve and seat
12.Inlet manifold gasket and seals
13.Inlet valve and seat
14.Cylinder head gasket
15.Valve guide 

ENGINE
6
DESCRIPTION AND OPERATION
OPERATION
The V8 engine is an eight cylinder, water cooled unit
comprising cast aluminium cylinder block and
cylinder heads.
The cast iron cylinder liners are shrink fitted and
located on stops in the cylinder block. The banks of
cylinders are at 90°to each other. The crankshaft is
carried in five main bearings, end-float being
controlled by the thrust faces of the upper centre
main bearing shell.The centrally located camshaft is driven by the
crankshaft via a chain....

ENGINE
DESCRIPTION AND OPERATION7
1.Oil strainer
2.Oil pump
3.Pressure relief valve4.Oil pressure switch
AOil to cooler
BOil from cooler
Lubrication
The full flow lubrication system uses a gear type oil
pump driven from the crankshaft. The assembly is
integral with the timing cover which also carries the
full flow oil filter, oil pressure switch and pressure
relief valve.
Oil is drawn from the pressed steel sump through a
strainer and into the oil pump, excess pressure
being relieved by the pressure...

ENGINE
8
DESCRIPTION AND OPERATION Hydraulic tappets
1.Clip
2.Pushrod seat
3.Inner sleeve
4.Upper chamber
5.Non-return ball valve
6.Spring
7.Outer sleeve
8.Lower chamber
The purpose of the hydraulic tappet is to provide
maintenance free and quiet operation of valves. It
achieves this by utilising engine oil pressure to
eliminate the mechanical clearance between the
rockers and the valve stems.During normal operation, engine oil pressure,
present in the upper chamber, passes through the
non-return ball...

ENGINE
OVERHAUL1
ROCKER SHAFTS
Rocker shafts - remove
1.LH rocker shaft only:Remove screw securing
dipstick tube to rocker cover.
2.Remove 4 bolts securing rocker cover to
cylinder head.
NOTE: Mark position of 2 longer bolts.
3.Remove rocker cover.
4.Remove and discard gasket from rocker cover.5.Mark each rocker shaft in relation to original
cylinder head.
CAUTION: Incorrect fitment of rocker
shafts will lead to an oil feed restriction.
6.Progressively slacken and remove 4 bolts
securing rocker shaft...

ENGINE
2
OVERHAUL Rocker shafts - dismantling
1.Remove and discard split pin from one end of
rocker shaft.
2.Remove plain washer, wave washer, rocker
arms, brackets and springs.Inspecting components
1.Thoroughly clean components.
2.Inspect each component for wear, in particular
rocker arms and shafts. Discard weak or
broken springs.
3.Inspect pushrod seats in rocker arms.
4.Check pushrods for straightness and inspect
ball ends for damage, replace as necessary. 

ENGINE
OVERHAUL3
Rocker shafts - assembling
1.Assemble rocker shafts with identification
groove at one oclock position with push rod
end of rocker arm to the right.
CAUTION: Incorrect assembly of rocker
shafts will lead to an oil feed restriction.
2.Fit new split pin to one end of rocker shaft.
3.Fit plain washer and wave washer.
4.Lubricate rocker arm bushes with engine oil.
5.Fit rocker arms with offsets as illustrated.
6.Assemble rocker arms, brackets and springs to
rocker shaft.
7.Compress springs,...