The
engine Section F
1
Description
The 750cc engine is a four cylinder in line
unit
having a diecast aluminium cylinder head
with
cast iron valve guides and sintered iron seats.
Diecast
aluminium is also used
for
the cylinder
block
which
incorporates removable
wet
liners.
The forged steel crankshaft is mounted on three
steel backed main bearings.
Routine maintenance
The engine oil level should be checked weekly
and topped
up
if
necessary
to
keep the oil
capacity at
3·13
litres
(5·50
pints). It is
important that this capacity is kept constant
for
any appreciable
drop
in the level
will
result in
poor
lubrication and possible engine damage.
To ensure the
lubrication system is kept clean
and free from impurities the engine oil should
be
changed and a
new
oil filter fitted, every
6,000 miles
(1
O,OOOkm).
Engine service operations
The
following
service operations give detailed
instructions
for
servicing and dismantling all the
major engine
assemblies. Where
it
is necessary
to
remove ancillary components and parts refer
to
the appropriate sections.
Before
reassembly during any operation, all
components should
be
thoroughly
cleaned,
paying particular attention
to
joint
faces and
bearing surfaces.
Any
local high spot or burrs on
the
joint
faces should be carefully removed
with
a fine file. Ensure that any piece
of
gasket
or
dirt
in a blind tapped hole is removed during
cleaning,
as
the
bolt
may bottom before the
bolt
head abuts the mating part. When tightening a
bolt
which
bottoms a characteristic springiness
may
be
felt. If this occurs the
bolt
should
be
removed and the hole cleaned out. '
Operation 1 - Engine removal
and installation
The engine should be removed complete
with
gearbox.
To
remove
1 Disconnect battery.
2 Drain
cooling system.
3 Drain engine
oil.
4 Disconnect alternator lead and remove
alternator.
5 Disconnect starter motor lead.
6 Disconnect temperature gauge sender
unit
lead at thermostat housing.
7 Disconnect
oil pressure indicator lead at
cylinder block.
8 Disconnect high and
low
tension leads
from coil.
9 Remove air cleaner.
10
Disconnect throttle cable at pedal and
choke
cable at carburettor.
11 Disconnect petrol supply pipe at fuel pump
and
plug
to
prevent loss
of
fuel and ingress
of
dirt.
12
Disconnect clutch cable at clutch operating
arm.
13
Disconnect heater hose at water pump.
14
Disconnect exhaust
down
pipe at manifold.
15
Remove starter motor.
16
Disconnect speedometer cable at gearbox
rear cover.
17
Press in retaining lugs, remove heater and
choke knobs from centre console, remove
locking nuts and disconnect heater and choke
cables.
18
Unscrew gear lever knob.
19
Remove
two
No. 8 screws securing rear
of
centre console
to
driveshaft tunnel. Then lift
centre console complete
with
gaiter over gear
lever.
20
Remove gear lever.
21
Unscrew six No. 8 self tapping screws and
remove engine rear access panel.
22
Disconnect heater hose at water valve on
heater.
23
Disconnect driveshaft from gearbox rear
coupling.
24
Remove
two~
UNF
self locking nuts and
washers, securing engine
front
mounting
rubbers
to
chassis
mounting
brackets.
25
Before removing gearbox rear mounting
support engine and gearbox
assembly
by
means
of
a suitable jack from underneath the vehicle
or lifting gear through bonnet aperture.
26
Remove four
1
5
6
UN F set screws and self
locking
nuts
to
detach gearbox support bracket
from chassis mounting.