1993 FORD MONDEO oil additives

cylinder head cover; unscrew it to add oil (see
illustration). When topping-up, use only the
correct grade and type of oil, as given in the
Specifications Section of this Chapter; use a
funnel if necessary to prevent spills. It takes
approximately 0.5 to 1.0 litre of oil to raise the
level from the dipstick’s minimum level notch
to its maximum level notch. After adding the
oil, refit the filler cap hand-tight. Start the
engine, and allow it to idle while the oil is
redistributed around the engine - while you
are waiting, look carefully for any oil leaks,
particularly around the oil filter or drain plug.
Stop the engine; check the oil level again,
after the oil has had enough time to drain from
the upper block and cylinder head galleries.
7Checking the oil level is an important
preventive maintenance step. A continually-
dropping oil level indicates oil leakage through
damaged seals and from loose connections,
or oil consumption past worn piston rings or
valve guides. If the oil looks milky in colour, or
has water droplets in it, the cylinder head
gasket may be blown - the engine’s
compression pressure should be checked
immediately (see Chapter 2A). The condition
of the oil should also be checked. Each time
you check the oil level, slide your thumb and
index finger up the dipstick before wiping off
the oil. If you see small dirt or metal particles
clinging to the dipstick, the oil should be
changed (Section 15).
Coolant
Warning: Do not allow antifreeze
to come in contact with your skin
or painted surfaces of the
vehicle. Flush contaminated areas
immediately with plenty of water. Don’t
store new coolant, or leave old coolant
lying around, where it’s accessible to
children or pets - they’re attracted by its
sweet smell. Ingestion of even a small
amount of coolant can be fatal! Wipe up
garage-floor and drip-pan spills
immediately. Keep antifreeze containers
covered, and repair cooling system leaks
as soon as they’re noticed.8All vehicles covered by this manual are
equipped with a sealed, pressurised cooling
system. A translucent plastic expansion tank,
located on the right-hand side of the engine
compartment, is connected by a hose to the
thermostat housing. As the coolant heats up
during engine operation, surplus coolant
passes through the connecting hose into the
expansion tank; a connection to the radiator
bottom hose union allows coolant to circulate
through the tank and back to the water pump,
thus purging any air from the system. As the
engine cools, the coolant is automatically
drawn back into the cooling system’s main
components, to maintain the correct level.
9While the coolant level must be checked
regularly, remember therefore that it will vary
with the temperature of the engine. When the
engine is cold, the coolant level should be
between the “MAX” and “MIN” level lines on
the tank, but once the engine has warmed up,
the level may rise to above the “MAX” level
line.
10For an accurate check of the coolant
level, the engine must be cold. The level must
be between the “MAX” and “MIN” level lines
on the tank (see illustration). If it is below the
“MIN” level line, the coolant must be topped-
up as follows.
11First prepare a sufficient quantity of
coolant mixture, using clean, soft water and
antifreeze of the recommended type, in the
specified mixture ratio. If you are using
antifreeze to Ford’s specification or equivalent
(see the note at the beginning of Section 2 of
this Chapter), mix equal quantities of water
and antifreeze to produce the 50/50 mixture
ratio specified when topping-up; if using any
other type of antifreeze, follow its
manufacturer’s instructions to achieve the
correct ratio. If only a small amount of coolant
is required to bring the system up to the
proper level, plain water can be used, but
repeatedly doing this will dilute the
antifreeze/water solution in the system,
reducing the protection it should provide
against freezing and corrosion. To maintainthe specified antifreeze/water ratio, it is
essential to top-up the coolant level with the
correct mixture, as described here. Use only
ethylene/glycol type antifreeze, and do not
use supplementary inhibitors or additives.
Warning: Never remove the
expansion tank filler cap when
the engine is running, or has just
been switched off, as the cooling system
will be hot, and the consequent escaping
steam and scalding coolant could cause
serious injury.
12If topping-up is necessary, wait until the
system has cooled completely (or at least 10
minutes after switching off the engine, if lack
of time means it is absolutely necessary to
top-up while the engine may still be warm).
Wrap a thick cloth around the expansion tank
filler cap, and unscrew it one full turn. If any
hissing is heard as steam escapes, wait until
the hissing ceases, indicating that pressure is
released, then slowly unscrew the filler cap
until it can be removed. If more hissing
sounds are heard, wait until they have
stopped before unscrewing the filler cap
completely. At all times, keep your face,
hands and other exposed skin well away from
the filler opening.
13When the filler cap has been removed,
add coolant to bring the level up to the “MAX”
level line (see illustration). Refit the cap,
tightening it securely.
14With this type of cooling system, the
addition of coolant should only be necessary at
very infrequent intervals. If topping-up is
regularly required, or if the coolant level drops
within a short time after replenishment, there
may be a leak in the system. Inspect the
radiator, hoses, expansion tank filler cap,
radiator drain plug and water pump. If no leak is
evident, have the filler cap and the entire
system pressure-tested by your dealer or
suitably-equipped garage; this will usually show
up a small leak not otherwise visible. If
significant leakage is found at any time, use an
antifreeze hydrometer to check the con-
centration of antifreeze remaining in the coolant.
1•7
13.13 Remove the cap to add coolant only
when the engine is cold - top-up to the
“MAX” level line using the specified
coolant mixture3.6 The yellow/black oil filler cap is
screwed into the cylinder head cover.
Always make sure the area around the
opening is clean before unscrewing the
cap, to prevent dirt from contaminating the
engine3.10 The cooling system expansion tank is
located on the right-hand side of the
engine compartment. The coolant level
must be between the tank “MAX” and
“MIN” level lines (arrowed) when the
engine is cold
Weekly checks
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To prevent the possibility of mixing up spark
plug (HT) leads, it is a good idea to try to work
on one spark plug at a time.
4If the marks on the original-equipment
spark plug (HT) leads cannot be seen, mark
the leads 1 to 4, to correspond to the cylinder
the lead serves (No 1 cylinder is at the timing
belt end of the engine). Pull the leads from the
plugs by gripping the rubber boot sealing thecylinder head cover opening, not the lead,
otherwise the lead connection may be
fractured.
5It is advisable to soak up any water in the
spark plug recesses with a rag, and to remove
any dirt from them using a clean brush,
vacuum cleaner or compressed air before
removing the plugs, to prevent any dirt or
water from dropping into the cylinders. Warning: Wear eye protection
when using compressed air!
6Unscrew the spark plugs, ensuring that the
socket is kept in alignment with each plug - if
the socket is forcibly moved to either side, the
porcelain top of the plug may be broken off. If
any undue difficulty is encountered when
unscrewing any of the spark plugs, carefully
1•24Every 30 000 miles
Specifications
Engine
Direction of crankshaft rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clockwise (seen from right-hand side of vehicle)
Oil filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion C148
Cooling system
Coolant protection at 40% antifreeze/water mixture ratio:
Slush point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -25°C (-13°F)
Solidifying point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30°C (-22°F)
Coolant specific gravity at 40% antifreeze/water mixture ratio and
15°C/59°F - with no other additives in coolant . . . . . . . . . . . . . . . . . . . . 1.061
Fuel system
Idle speed - nominal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 830 ± 50 rpm*
Air filter element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion U618
Fuel filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion L218
* Note: Given for reference only - not adjustable.
Ignition system
Firing order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3-4-2 (No 1 cylinder at timing belt end of engine)
Spark plugs:*
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion RE7YCC
Electrode gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 mm
Spark plug (HT) leads:
Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion type not available
Maximum resistance per lead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 000 ohms
* Information on spark plug types and electrode gaps is as recommended by Champion Spark Plug. Where alternative types are used, refer to
their manufacturer’s recommendations
Braking system
Note: No minimum lining thicknesses are given by Ford - the following is given as a general recommendation. If the pad wear warning light
comes on before the front brake pad linings reach the minimum thickness, the pads should nevertheless be renewed immediately.
Minimum front or rear brake pad lining thickness . . . . . . . . . . . . . . . . . 1.5 mm
Minimum rear brake shoe lining thickness . . . . . . . . . . . . . . . . . . . . . . . 1.0 mm
Suspension and steering
Tyre pressures (cold):Front Rear
Normally laden* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 bars (31 psi) 2.1 bars (31 psi)
Fully laden* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 bars (35 psi) 2.8 bars (41 psi)
Note: Normally laden means up to 3 persons. For sustained high speeds above 100 mph (160 km/h), increased pressures are necessary.
Consult the driver’s handbook supplied with the vehicle.
Wiper blades
Windscreen:
Driver’s side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion X 5303 (and SP 01 spoiler)
Passenger’s side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion X 5103
Tailgate:
Hatchback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion X 5103
Estate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion type not available
Torque wrench settingsNm lbf ft
Auxiliary drivebelt cover fasteners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 to 10 4 to 7
Auxiliary drivebelt automatic tensioner Torx screws . . . . . . . . . . . . . . . . 23 17
Engine oil drain plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 18
Manual transmission filler/level plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 26
Radiator undershield screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5
Spark plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 11
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2The function of these components is to
reduce the emission of unburned
hydrocarbons from the crankcase, and to
minimise the formation of oil sludge. By
ensuring that a depression is created in the
crankcase under most operating conditions,
particularly at idle, and by positively inducing
fresh air into the system, the oil vapours and
“blow-by” gases collected in the crankcase
are drawn from the crankcase, through the oil
separator, into the inlet tract, to be burned by
the engine during normal combustion.
Checking
3Checking procedures for the system
components are included in Chapter 1.
Component renewal
Cylinder head-to-air cleaner hose
4See Chapter 1.
Positive Crankcase Ventilation (PCV)
valve
5The valve is plugged into the oil separator.
Depending on the tools available, access to
the valve may be possible once the pulse-air
assembly has been removed (see Section 7).
If this is not feasible, proceed as outlined in
paragraph 6 below.
Oil separator
6Remove the exhaust manifold (see Chap-
ter 2, Part A). The Positive Crankcase
Ventilation (PCV) valve can now be unplugged
and flushed, or renewed, as required, as
described in Chapter 1.
7Unbolt the oil separator from the cylinder
block/crankcase, and withdraw it; remove and
discard the gasket.
8Flush out or renew the oil separator, as
required (see Chapter 1).
9On reassembly, fit a new gasket, and
tighten the fasteners to the torque wrench
settings given in the Specifications Section of
Chapter 2, Part B.
10The remainder of the refitting procedure is
the reverse of removal. Refill the cooling
system (see Chapter 1). Run the engine,
check for exhaust leaks, and check the
coolant level when it is fully warmed-up.
General information
1The exhaust gases of any petrol engine
(however efficient or well-tuned) consist
largely (approximately 99 %) of nitrogen (N
2),
carbon dioxide (CO
2), oxygen (O2), other inert
gases and water vapour (H
2O). The remaining
1 % is made up of the noxious materials
which are currently seen (CO
2apart) as the
major polluters of the environment: carbon
monoxide (CO), unburned hydrocarbons (HC),oxides of nitrogen (NO
x) and some solid
matter, including a small lead content.
2Left to themselves, most of these pollutants
are thought eventually to break down naturally
(CO and NO
x, for example, break down in the
upper atmosphere to release CO
2) having first
caused ground-level environmental problems.
The massive increase world-wide in the use of
motor vehicles, and the current popular
concern for the environment has caused the
introduction in most countries of legislation, in
varying degrees of severity, to combat the
problem.
3The device most commonly used to clean
up vehicle exhausts is the catalytic converter.
It is fitted into the vehicle’s exhaust system,
and uses precious metals (platinum and
palladium or rhodium) as catalysts to speed
up the reaction between the pollutants and
the oxygen in the vehicle’s exhaust gases, CO
and HC being oxidised to form H
2O and CO2and (in the three-way type of catalytic
converter) NO
xbeing reduced to N2. Note:
The catalytic converter is not a filter in the
physical sense; its function is to promote a
chemical reaction, but it is not itself affected
by that reaction.
4The converter consists of an element (or
“substrate”) of ceramic honeycomb, coated
with a combination of precious metals in such
a way as to produce a vast surface area over
which the exhaust gases must flow; the whole
being mounted in a stainless-steel box. A
simple “oxidation” (or “two-way”) catalytic
converter can deal with CO and HC only,
while a “reduction” (or “three-way”) catalytic
converter can deal with CO, HC and NO
x.
Three-way catalytic converters are further
sub-divided into “open-loop” (or
“uncontrolled”) converters which can remove
50 to 70 % of pollutants and “closed-loop”
(also known as “controlled” or “regulated”)
converters which can remove over 90 % of
pollutants.
5The catalytic converter fitted to the Mondeo
models covered in this manual is of the three-
way closed-loop type.
6The catalytic converter is a reliable and
simple device, which needs no maintenance
in itself, but there are some facts of which an
owner should be aware if the converter is to
function properly for its full service life.
(a) DO NOT use leaded petrol in a vehicle
equipped with a catalytic converter - the
lead will coat the precious metals,
reducing their converting efficiency, and
will eventually destroy the converter; it will
also affect the operation of the oxygen
sensor, requiring its renewal if lead-
fouled. Opinions vary as to how much
leaded fuel is necessary to affect the
converter’s performance, and whether it
can recover even if only unleaded petrol is
used afterwards; the best course of action
is, therefore, to assume the worst, and to
ensure that NO leaded petrol is used at
any time.
(b) Always keep the ignition and fuel systemswell-maintained in accordance with the
manufacturer’s schedule (Chapter 1) -
particularly, ensure that the air filter
element, the fuel filter and the spark plugs
are renewed at the correct intervals. If the
intake air/fuel mixture is allowed to
become too rich due to neglect, the
unburned surplus will enter and burn in
the catalytic converter, overheating the
element and eventually destroying the
converter.
(c) If the engine develops a misfire, do not
drive the vehicle at all (or at least as little
as possible) until the fault is cured - the
misfire will allow unburned fuel to enter
the converter, which will result in its
overheating, as noted above. For the
same reason, do not persist if the engine
refuses to start - either trace the problem
and cure it yourself, or have the vehicle
checked immediately by a qualified
mechanic.
(d) Avoid allowing the vehicle to run out of
petrol.
(e) DO NOT push- or tow-start the vehicle
unless no other alternative exists,
especially if the engine and exhaust are at
normal operating temperature. Starting
the engine in this way may soak the
catalytic converter in unburned fuel,
causing it to overheat when the engine
does start - see (b) above.
(f) DO NOT switch off the ignition at high
engine speeds, in particular, do not “blip”
the throttle immediately before switching
off. If the ignition is switched off at
anything above idle speed, unburned fuel
will enter the (very hot) catalytic converter,
with the possible risk of its igniting on the
element and damaging the converter.
(g) Avoid repeated successive cold starts
followed by short journeys. If the
converter is never allowed to reach its
proper working temperature, it will gather
unburned fuel, allowing some to pass into
the atmosphere and the rest to soak in
the element, causing it to overheat when
a long journey is made - see (b) above.
(h) DO NOT use fuel or engine oil additives -
these may contain substances harmful to
the catalytic converter. Similarly, DO NOT
use silicone-based sealants on any part of
the engine or fuel system, and do not use
exhaust sealants on any part of the
exhaust system upstream of the catalytic
converter. Even if the sealant itself does
not contain additives harmful to the
converter, pieces of it may break off and
foul the element, causing local
overheating.
(i) DO NOT continue to use the vehicle if the
engine burns oil to the extent of leaving a
visible trail of blue smoke. Unburned
carbon deposits will clog the converter
passages and reduce its efficiency; in
severe cases, the element will overheat.
(j) Remember that the catalytic converter
operates at very high temperatures -
9 Catalytic converter -
general information, checking
and component renewal
Emissions control systems 6•19
6
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