2018 AUDI TT ROADSTER engine

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Emissions control
systems
Catal ytic conve rt er
The vehicle may on ly be driven with unleaded
gasoline, otherwise the catalyt ic converter will be
destroyed.
Never drive until the tank is completely empty.
The irregular supply of f uel that results from that
can cause engine m isfires. Uncombusted fuel will
enter the exhaust system, wh ich can cause over­
heat ing and damage to the catalyt ic converter .
A WARNING
The temperature of the exhaust system is
high, both when d riving and after stopping
the engine.
-
- Never touch the exhaust tail pipes once they
have become ho t. This could result in bu rns.
- Do not park your vehicle ove r flammable
materials such as g rass or leaves because
the high temperat ure of the em iss ions con­
trol system co uld s tart a fire.
- Do not apply underbody p rotectant in the
exha ust system area, because this inc reases
the risk of fi re.
On Board Diagnostic
System (OBD)
The On -Board Diagnostic System monitors the
engine and transmission components that influ­
ence emissions.
F ig . 177 Footwell on left side of the vehicle : connect ion
port for the On-Board Diagnostic System (OBD)
Chec king and Filling
On -Board Diagnostic System
Engine da ta can be read out at the On-Board Di­
agnost ic System connection port using a spec ia l
testing
dev ice~ fig. 177 .
Indicator light
If thP ¢'4 ind icator light blinks or turns on, there
is a ma lf u nction that is caus ing poo r emissions
quality and that cou ld damage the catalytic con­
verter .
Drive slowly to an a uthorized Aud i dea ler or au­
t h orized Audi Serv ice Facili ty to have t he mal­
f unct ion corrected.
A WARNING ..
Incorrect use of the connection port for the
On-Board D iagnostic System can cause ma l­
f u nctions, which can then result in accidents
and serious injuries.
- Only allow an authorized Audi dea ler or au­
thor ized Audi Service Fac ility to read out the
engine data.
Engine compartment
Working in the engine compartment
Special care is required if you are working in the
engine compartment
-
F o r work in the engine compa rtment such as
checking and fill ing fl uids , there i s a risk of in­
jury , scalding, accident s, and b urn s. For thi s
re ason , follow all the warnings and general
safety pre cautions prov ided in the following
in ­
formati on. The engine compartm ent i s a dan­
gerou s area .
~ .&..
A WARNING
-----Turn the engine off.
- Sw itch the igni tio n off.
- Set the parking brake.
- P lace the se lector lever in the P position.
-Let the eng ine cool down.
-Never open the hood when there is steam or
coolant escaping from the engine compart­
ment, because there is a risk that you could
233

Check ing and F illing
be burned. Wait until no steam or coolant is
escaping.
- Keep children away from the engine com ­
partment.
- Never spill fluids on a hot engine . These flu ­
ids (such as the freeze protection contained
in the coolant) can catch fire.
- Avoid short circuits in the e lectrica l system,
especially to the battery.
- When working in the engine compartment,
remember that the radiator fan can switch
on even if the ign ition is switched off, which
increases the risk of personal in jury.
- Never open the cap on the coolant expan­
sion tank when the eng ine is warm. The
cooling system is under pressure.
- To protect your face, hands, and arms from hot steam or coolant, cover the cap with a
large cloth when opening.
- Do not remove the engine cover under any circumstances. This increases the risk of
burns .
- If tests need to be performed w ith the en­
gine ru nning, there is additional danger due
to moving components (such as the ribbed
belt, a lter nator and radiator fa n) and from
the high-voltage ign it io n system.
- Do not press the accelerator pedal inadver­
tent ly if a gear is selected when the veh icle
is sta tionary and the eng ine is ru nning. Oth­
erwise, the veh icle w ill start to move imme ­
diately and t his co uld r esult in an a ccid en t.
- Pay attention to the fo llow ing warnings list­
ed whe n wo rk on the fuel system or on the
electri cal eq uipment is requ ired.
- Do not smoke.
- Never work near open flames.
- Always have a working fire extinguisher
nearby.
- All work on the battery or e lectrica l system
in yo ur vehicle can res ult in injuries, chemi­
ca l burns, accidents or burns. Because of
t h is, all wor k must be performed
only by an
autho rized Aud i dealer or authorized Aud i
Service Facility .
- To reduce the risk of electric shock and in­
jury , never touch the following components
234
when t he engine is runni ng or is being start ­
ed:
- Ig nition cable
- Other compone nts in the electron ic high-
vo ltage ig nition system
- If you must check or perform work on the
eng ine wh ile it is ru nning:
- Set the pa rking brake and p lace the selec ­
tor lever in the P (par k) position fi rst .
- Alw ays proceed w ith ext reme cau tion so
t h at clothing, jewelry or long hair do not
become ca ught in the radiator fan, fan
belt or other moving components or do
not come into contact with hot compo ­
nents. Tie back long hair before begin ning
work and do not wear clothing that can
hang dow n into the eng ine .
- Lim it your exposure to exhaust and chemi­
cals to as short a time as possible
<=> &. .
A WARNING
Ca lifo rnia Proposition 65 Warning:
- Engine exhaust, some of its const ituents,
a nd certa in veh icle components conta in or
em it chem icals know n to the State of Cal i­
fornia to ca use cancer and b irth defects and
reproductive harm. In add ition, certain flu­
ids cont ained in vehicles a nd certai n prod ­
uc ts of component we ar con tain or em it
chemica ls known to the State o f Califo rnia
to cause cancer and birth defects or othe r
reproductive harm.
- Battery posts, terminals and related acces ­
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive harms.
Was h ha nds after handling.
@ Note
When filling fluids, be sure not to mix the flu ­
i ds up. Otherwise severe mal functions and en­
g ine damage will occu r.
@ For the sake of the environment
You sho uld regularly check the gro und under
your vehicle in order to detect leaks quick ly. If
there are visible spots from oi l or othe r fluids,
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bring your vehicle to an authorized Aud i dea l­
er or authorized Audi Service Facility to be
checked.
Opening/closing the hood
The hood is released from inside the vehicle.
F ig. 178 Sect ion from the drive r's side footwell: release
lever
F ig. 179 Unloc ked hood: lever
"' 8
~ (I)
Make sure the w iper arms are not raised up from
the windshield. Otherwise the pa int could be
damaged .
Checking and Filling
Opening the hood
... With t he driver's door open, pull the lever be­
low the inst rument pane l in the direction of the
arrow ¢ fig. 178 .
... Raise the hood slightly ¢.&, .
... Press the lever¢ fig. 179 in the direction of the
arrow. Th is releases the hooks .
... Open the hood .
Closing the hood
... Push the hood down unti l yo u override the
force of the struts .
... Let the hood fall lightly into the latch. Do not
press it in.
¢ .&, .
A WARNING
--Never open the hood when there is steam or
coolant escaping from the engine compart­
ment, because there is a risk that you could
be burned. Wait unt il no steam or coolan t is
escapi ng.
- F or safety reasons, the hood m ust always be
closed securely while driving. Because of
this, always che ck the hoo d after closing it
to make sure it is latched correct ly. The
hood is latched if the front corners cannot
be lifted.
-If you notice that the hood is not latched
while you are driving, stop immediately and
close it, because driving when the hood is not latched increases the r isk of an accident.
235

Checking and Filling
Engine compartment overview
The most important check points .
Fig . 180 Typ ica l layou t of th e re servo ir and t he e ngin e o il f ille r open ing
(D Coolan t expans ion tank ( - t) ¢ page 240
@ Engin eoildipstick c:opage237
® Eng ine oi l filler opening (-er. ) co page 23 7
© Eng ine oil label* w ith VW standard
co page 236
® Brake fluid re servo ir ((0)) co page 241
@ Jump start po int( +) under a cover, ( -) body
ground
po int ¢ page 284
(J) Fuse hous ing ¢ page 2 80
@ Washer fluid rese rvoir (W) ¢ page 243
The eng ine oil dip stick @and the engine oi l filler
open ing ® ¢ fig. 180 may be loc ated in d ifferent
p laces within the engine compartment, depend ­
i n g on the engine vers ion .
A WARNING
Read and follow all WARN INGS before check­
ing anythi ng in the eng ine compa rtment
¢ page 233 .
236
Engine oil
· If the engine oil level is too low
If you need to add engin e oil , use an oil that is
listed on the s tick er.
The sticker is located at the
front of the eng ine
compartment ¢ page 236,
fig. 180.
If the re commended e ng ine o il is not available,
in an emergenc y you may add a maximum of 1
quart (1 liter) of AC EA C3 or API SN eng ine oi l
one time until the nex t oi l c hange .
F or more informa tion on the corre ct eng ine oil
for yo ur vehicle , contact an authorized Audi deal­
e r or authorized Aud i Serv ice Facility . Have the o il
c h anged by an autho rized Aud i dealer o r autho r-
i zed Service Facility.
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Audi recommend s
~castrol /Jg/g/!i;lg ?nw.::<-.1-:J.oNAl.
Aud i recomm ends using the Lo ng Life h igh­
pe rfo rm ance e ng ine oil from Audi G enu ine
Parts.
Checking the engine oil level
F ig. 181 O il dipstick (example): check ing the engine o il
leve l
Observe the safety precautions¢ &_ in Working
in the engine compartment on page 233 .
.. Park your vehicle on a level surface.
.. Shu t the engine off when it is warm .
.. Wait approx imately two minutes.
.. Open the hood ¢ page 235.
.. Remove the oi l dipstick ¢page 236, fig. 180,
wipe it off with a clean cloth and insert it all the
way in again.
.. Remove the o il dipstick again and then read the
o il level <=>
table on page 2 3 7.
.. Add engine oil if necessary ¢ page 238.
Areas on the oil dipstick¢ fig. 181.
© If t he engine o il level is just before the
marking ©, then engine oil must be added.
See
¢ (1) .
@ Do not add eng ine oil.
@ Note
- The eng ine oil level must not be under the
mark ing © <=>
fig. 181, because this increas­
es the risk of engine damage.
-After adding engine oil, the o il level must
not be above the marking @¢
fig. 181, be­
cause this increases the risk of catalytic con­
verter and/or eng ine damage . Do not start
Chec king and Filling
the engine . Con tact an authorized A udi
dealer or authorized Audi Service Facility to
have excess eng ine oil extracted if necessa­
ry.
@ Tips
The engine oil consumption may be up to
0.5 quart/600 miles (0.5 liter/1,000 km), de­
pending on driving style and operat ing condi­
tions. Consumption may be hig her during the
first 3,000 m iles (5,000 km) . Because of th is,
the engine o il level must be checked reg ular­
l y .
It is best to check each time you refuel
your vehicle and befo re long drives.
- In order to prov ide effec tive lubrication and
cooling of internal engine components, a ll
internal combustion engines consume acer­
tain amount of oil. Oil consumption var ies
from engine to engine and may change sig­ nificantly over the life of the engine . Typi­
cally, eng ines with a specified break-in peri­
od consume more oil during the break-in pe­
r iod than they consume after oil consump­
tion has stabilized .
- Under normal condit ions, the rate of oil
consumption depends on the quality and
viscos ity of the oil, the RPM (revolutions per
m in ute) at which the engine is operated, the
ambient temperatu re and road conditions .
Further factors a re t he amo unt of oi l di lu­
t ion from water condensat ion or fue l resi­
due and the oxidation level of the oil. As any
eng ine is subject to wear as m ileage builds
up, the oil consumption may increase over
time until replacement of worn components may become necessary.
- With all these var iables coming into play,
no standard rate of o il consumption can be
established or specified. There is no alterna­
t ive to check ing the oil leve l regularly and
frequently.
- If you have the impression your engine con­
sumes excessive amounts of oil, we recom­
mend that you consult a n author ized Audi
dea le r to have the cause of your conc ern
properly diagnosed. Keep in mind tha t the
acc ura te measurement of o il cons umption
requires great care and may take some
237

Check ing and F illing
time. An authorized Audi dealer has instruc­
tions about how to measure oil consump ­
tion acc urately.
- You can find information on engine oi l and
engine oil capacities for the USA at
www.audiusa.com/help/maintenance, or
for Canada at www.audi.ca/ca/web/en/
cus tomer-area/ ca re-a nd-mai n tena nee/ aud i­
se rvice -sched ules . html, or call
800-822-2834 .
Adding engine oil
Fig. 18 2 Eng ine co mpa rtmen t: e ngin e o il fille r open ing
cove r
Obse rve the safety p recaut ions ¢&. in Working
in the engin e comportment on page 233 .
"'Turn the eng ine off.
"' Open the hood ¢ page 235.
"'Unscrew the cap~ for the eng ine o il filler
opening
¢ fig. 182.
"'Carefu lly add 0.5 quart (0 .5 liter) of the correct
oi l
¢pag e 236.
"'Check the oil leve l again after two minutes
¢ page 23 7, Checking the engine oil level.
"' Add a smaller amount of engine o il if necessa­
ry . T he
marking @Qpage 237, fig . 181 must
not be exceeded
¢ QJ) in Checking the engine oil
level on page 237.
"' Close the engine oil fille r cap and p ush the dip ­
stick a ll the way in .
"' Close the hood .
A WARNING
-When adding oi l, do not let oil d rip onto hot
engine components. T his increases the r isk
of a fire .
238
-You must sea l the cap on the oi l filler open ­
ing correct ly so that oi l does not leak out
onto the hot eng ine and exhaust system
when the engine is running, because this is a fire hazard .
- Always clean sk in thoroughly if it comes i nto
contact with eng ine oil.
- Engine oil is poisonous and must be kept
out of reac h of children .
- Store the engine o il secure ly in the origina l
container.
@ Note
- Your Limited New Vehicle Warranty does
not cover damage or ma lfunctions due to
failure to fo llow recommended mainte­
nance and use req uirements as set fort h in
the A udi Owner's Manual and Warranty
&
Ma intenance bookle t.
- Use on ly a high quality e ngine o il that ex­
press ly complies with the A ud i oi l quality
standard spec ified fo r you r vehicle 's eng ine .
Us ing any othe r o il can cause ser io us eng ine
damage .
- Do not mix a ny add it io na l lubr icants into
the engine oil. Damage ca u sed by such add i­
t ives is no t covere d by the w arra nty.
@ For the sake of the environment
- Oil sho uld neve r enter the sewer system or
c ome into con ta ct w ith the g round.
- Pay attent ion to lega l req uiremen ts when
disposing of empty o il conta iners.
Changing the engine oil
We recommend that have your oil changed by an
authorized Audi dealer or a qualified service sta­ tion.
Before you check anything in the engine compart ­
ment,
always r ead and heed all WARNINGS Q .&.
in Working in the engine compartment on
page 233.
The eng ine o il must be changed according to the
i nterva ls spec ified in your Warranty
& Ma inte­
nance boo klet . This is ve ry importa nt because the
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lubricating properties of oil diminish gradually
during normal vehicle use.
Unde r some c ircu mstances the eng ine o il should
be changed more frequently . Change oil mo re of­
ten if you drive most ly short distances, ope rate
the vehicle in dusty areas or under predominant ly
stop-and -go traffic condit ions, or have your vehi­
cle where temperatures remain below free zing
for extended periods.
Detergent additives in the oil will make fresh oil
l ook dark after the engine has been running for a
short time. Th is is normal and is not a reason to
change the oil more often than recommended.
Because of the problem of proper disposa l, along
with the special tools and necessary expertise re­
qu ired, we strongly recommend that you have
your oil changed by an authorized
A ud i de ale r or
a qualified service station .
If you c hoo se to change your o il y our self , please
note the following important information:
A WARNING
To reduce the risk of personal injury if you
must change the engine oil in your veh icle
yourself:
- Wear eye protection .
- To reduce the risk of burns from hot engine oil, let the eng ine cool down to the touch.
-
- When removing the o il drain plug with your
fingers, stay as far away as poss ible. A lways
keep your forearm paralle l to the ground to
help prevent hot o il from runn ing down your
arm .
- Drai n the oil into a container designed for
this pu rpose, one large enough to hold at
least the total amount of oil in your e ng ine .
- Engine oil is poisonous . Keep it well out of
the reach of ch ild ren .
- Cont inuous contact w ith used eng ine oi l is
harmful to your sk in. A lways protect your
sk in by washing oil off thoroug hly w ith soap
and water.
@ Note
Never mix oil addit ives with your engine o il.
These additives ca n damage your eng ine and
Ch eck ing and F illing
adverse ly affect yo ur Audi Limited New Vehi­
cle Warranty.
@ For the sake of the environment
- Before chang ing yo ur oil, first make sure
you know where you can proper ly d ispose o f
the used oi l.
- Always dispose of used engine o il properly.
Do not dump it on garden soil, wooded
areas, into open streams or down sewage
drains.
- Recycle used engine oi l by taking it to a used
engine oi l collection faci lity in you r area, or
contact a service station .
Cooling system
Coolant
The eng ine cooling system is fi lled w it h a m ixtu re
of purified water and coo lant additive at the fac ­
tory . This coolant must not be not c hanged.
T he coo lant level is mo nitored th ro ugh
the . in­
dicator light
<:!) page 12. However, we do recom­
mend occasionally checking the coolant leve l
manua lly.
If you must add coolant, use a mixture of wate r
and coolant additive . Mix ing t he coo lant add it ive
with dis tilled water is recommended.
Coolant additive
T he coolant add itive is made of anti-free zing and
cor rosion protect ion agents. On ly use the follow­
i ng coolant additives . These add itives may be
mixed wi th ea ch o the r.
Coolant additive Specification
G 13 TL 774 J
G12++ TL 774 G
The amount of coolant additive that needs to be
mixed with water depends on the cl imate where
the vehicle w ill be oper ated. If the coo lant add i­
t ive percentage is too low, the coolant can freeze
and damage the eng ine .
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239

Checking and Filling
Coolant Freeze protec-
tion
additi ve
Warm min. 40% min. -13 °F
regions (- 25 °C)
max . 45%
Cold min. 50% max. -40 °F
regions (-40 °C)
max. 55%
@ Note
- Before the start of winter, have an author­ ized Audi dealer or authorized Audi Service
Facility check if the coolant additive in your
vehicle matches the percentage appropriate
for the climate. Th is is especially important
when driving in co lder climates.
- If the appropriate coolant additive is not
available in an emergency, do not add any
other additive . You cou ld damage the en­
gine.
If t his happens, only use wate r and re­
store the correct mixture ratio with the
specified coolant additive as soon as possi­
ble .
- Only refill with new coo lant.
- Radiato r sealant must not be mixed w ith
the coo lant .
Adding coolant
Fig . 183 Eng ine co mpartment : coo lant expans ion ta nk
cove r (exa mple)
Observe the safety precautions c:::> page 233 ,
Working in the engine compar tment.
Che cking the engin e coolant l evel
.. Park the vehicle on a level surface .
.. Switch the ignition off .
240
~ 0 > 00 ID
.. Read the coolant level on the coolant expansion
tank
c:::> page 236, fig. 180 . The coolant level
must be between the markings when the en­
gine in cold. When the engine is warm it can be
slightly above the upper mark ing .
Adding coo lant
Requirement : there must be a residual amount of
coolant in the expansion tank
c:::> @ .
.. Let the engine cool down.
.. Place a clot h over the coolant expansion tank
cap and unscrew the cap counterclockwise
c:::> ,A .
.. Add coo lant mixed in the correct rat io
c:::> page 239 up to the upper marking .
.. Make sure that the fluid level remains stable.
Add more coolant if necessary .
.. Close the cap securely .
Coolant loss usually ind icates there is a leak. Im­
mediate ly dr ive your vehicle to a n author ized
Audi dealer or author ized Audi Service Fac il ity
and have the cooling system inspected. If the
cooling system is not lea king , a loss can come
from the coolant boiling through overheat ing
and being pushed ou t of the cooling system .
Lil WARNING
- The cooling system is under pressure. Do
not open the coo lant expansion tank cap
when the engine is hot. This increases the risk of burns.
-The coolant additive and the coolant can be dangerous to your health. For this reason ,
keep the coolant in the original container
and away from children. There is a risk of
poisoning.
-When working in the engine compartment,
remember that the radiator fan can switch
on even if the ignition is switched
off, wh ich
increases the r is k of injury.
@ Note
Do not add coolant if the expans ion tank is
empty . A ir could enter the cooling system and
-
damage the eng ine . If this is the case, do not ..,.