2018 Audi A5 S5 engine fastener tightening specifications

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Condition	Value

expand_moreAir intake system

expand_moreIntake manifold

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Tighten cross-wise.
Second stage	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
Third stage	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreAll other modifications


Lower section of intake manifold	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreNuts


Upper section of intake manifold	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreUpper section of intake manifold


Stud screws	12.54 lbf⋅ft12.54 lbf⋅ft17 N⋅m

expand_moreAuxiliary assemblies

expand_moreAuxiliary drive belt deflection pulley


Audi gasoline V8 4.2 L CAUA 349 HP	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreAll other modifications


Compressor belt	30.98 lbf⋅ft30.98 lbf⋅ft42 N⋅m
Otherwise	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m

expand_moreAuxiliary drive belt tensioner

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP


M10	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
M8	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreAll other modifications


Compressor belt	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Otherwise	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m


Air-conditioning compressor	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAir-conditioning compressor pressure line

expand_moreS5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)


M6	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
M8	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAlternator


Audi gasoline V8 4.2 L CAUA 349 HP	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
All other modifications	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_moreGenerator bracket

expand_moreS5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)


M10	33.93 lbf⋅ft33.93 lbf⋅ft46 N⋅m
M8	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreHydraulic lines at the servo-steering pump

expand_moreS5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)


M6	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
Union nuts	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m

expand_moreServo pump pulley


With hydraulic servo-steering	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreServo steering pump

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP


M12	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m
M8	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAll other modifications


With hydraulic servo-steering	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m


Vacuum pump	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreCarburetion


Fuel-distributing pipe	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
High-pressure line	19.91 lbf⋅ft19.91 lbf⋅ft27 N⋅m
High-pressure pump	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Tighten bolts uniformly in several passes.

expand_moreCooling system


Coolant pump	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
Coolant pump pulley	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreCylinder head

expand_moreCamshaft bearing

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Tighten new screws in inside-to-outside order.
Second stage	90°90°90°

expand_moreAll other modifications

expand_moreBearing casing


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Tighten new screws in inside-to-outside order.
Second stage	90°90°90°

expand_moreCylinder head screws

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP

expand_moreScrews 1 – 10


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Use new screws.
Second stage	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Third stage	90°90°90°
Fourth stage	90°90°90°

expand_moreScrews 11 – 14

expand_moreFifth stage


First step	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace screws.
Second step	90°90°90°

expand_moreScrew 6


Cap	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
Replace sealing rings.

expand_moreAll other modifications


First stage	Screw in screw(s) by hand.
Use new screws.
Second stage	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Third stage	90°90°90°
Fourth stage	90°90°90°

expand_moreCylinder head screws shank length (new)


S5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)	4.45 in4.45 in113 mm

expand_moreValve cover


S5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
cross-wise from inside to outside

expand_moreEngine block

expand_moreBalance shaft gear wheel


Central screws	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m

expand_moreWheel


First stage	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreConnecting rod bearing

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP


First stage	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Use new screws.
Second stage	90°90°90°

expand_moreAll other modifications


First stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreDrive plate

expand_moreOn crankshaft


First stage	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreEngine block closure screws


S5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m

expand_moreFlywheel


To drive plate	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Replace screws.

expand_moreMain bearing

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP


Fifth stage	90°90°90°

expand_moreInside


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
cross-wise from inside to outside
Third stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m

expand_moreOutside


Second stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
cross-wise from inside to outside
Fourth stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreAll other modifications

expand_moreScrews 1 – 16


First stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Use new screws.
Second stage	90°90°90°

expand_moreScrews 17 – 31


Third stage	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Replace screws.
Fourth stage	90°90°90°

expand_moreVibration damper

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP


First stage	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreAll other modifications


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreEngine control

expand_moreBottom part of the control unit housing

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP

expand_moreM6


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Note correct order of tensioning.
Second stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Third stage	90°90°90°


M8	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreAll other modifications

expand_moreScrew 10


First stage	2.21 lbf⋅ft2.21 lbf⋅ft3 N⋅m
Fourth stage	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreScrews 1 – 9


Second stage	2.21 lbf⋅ft2.21 lbf⋅ft3 N⋅m
Third stage	90°90°90°

expand_moreScrews 6 – 8


Fifth stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Sixth stage	90°90°90°

expand_moreScrew 9


Sixth stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Seventh stage	180°180°180°

expand_moreCamshaft timing chain tensioner

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Replace screws.
Second stage	90°90°90°


All other modifications	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreCamshaft timing gear

expand_moreS5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)


First stage	59 lbf⋅ft59 lbf⋅ft80 N⋅m
Replace bolt.
Second stage	90°90°90°

expand_moreControl drive chain tensioner

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Replace screws.
Second stage	90°90°90°


All other modifications	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreControl drive sprocket wheel

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP


M10	30.98 lbf⋅ft30.98 lbf⋅ft42 N⋅m
M8	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreAll other modifications

expand_moreAt the bearing pedestal

expand_moreScrews


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Replace screws.
Second stage	60°60°60°

expand_moreBearing pedestal

expand_moreOn the engine block


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace screws.
Second stage	45°45°45°

expand_moreOn the engine block

expand_moreCentral screws


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Use new screw.
Second stage	90°90°90°

expand_moreControl drive timing chain slip rail


First stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreInlet camshaft wheel


First stage	59 lbf⋅ft59 lbf⋅ft80 N⋅m
Use new screw.
Second stage	90°90°90°

expand_moreIntermediate shaft chain sprocket


S5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)	30.98 lbf⋅ft30.98 lbf⋅ft42 N⋅m

expand_moreOil pump drive chain tensioner


Audi gasoline V8 4.2 L CAUA 349 HP	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreAll other modifications


First stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Replace screws.
Second stage	45°45°45°

expand_moreOutlet camshaft wheel


First stage	59 lbf⋅ft59 lbf⋅ft80 N⋅m
Use new screw.
Second stage	90°90°90°

expand_moreTension rail bearing screws

expand_moreS5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)


First stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Replace bolts.
Second stage	90°90°90°

expand_moreTiming case cover

expand_moreScrew 1


First stage	2.21 lbf⋅ft2.21 lbf⋅ft3 N⋅m
Replace screws.

expand_moreScrews 2 – 11


Second stage	2.21 lbf⋅ft2.21 lbf⋅ft3 N⋅m
Use new screws and tighten them crosswise.

expand_moreScrews 1, 2, 3, 6, and 8


Third stage	90°90°90°

expand_moreScrews 9 – 11

expand_moreFourth stage


First step	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Second step	90°90°90°

expand_moreScrew 4


Fifth stage	11.8 lbf⋅ft11.8 lbf⋅ft16 N⋅m

expand_moreScrew 7

expand_moreSixth stage


First step	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Second step	90°90°90°

expand_moreTiming case cover first cylinder row


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreTiming case cover second cylinder row


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreTiming chain tensioner intermediate shaft


S5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreTop part of control unit housing


S5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreEngine lubrication

expand_moreOil cooler


S5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreOil drain plug


Audi gasoline V8 4.2 L CAUA 349 HP	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All other modifications	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreOil filter housing

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP


Cap	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
M6	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
M8	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreAll other modifications


Cap	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
On the engine block	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m

expand_moreOil pump chain wheel


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreOil sump

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP

expand_moreOil sump lower part


First stage	Tighten by hand
Tighten the screws crosswise.
Second stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Third stage	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreOil sump top part


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Tighten the screws crosswise.
Second stage	10.33 lbf⋅ft10.33 lbf⋅ft14 N⋅m

expand_moreAll other modifications

expand_moreOil sump lower part


First stage	2.21 lbf⋅ft2.21 lbf⋅ft3 N⋅m
Use new screws and tighten them crosswise.
Second stage	90°90°90°

expand_moreOil sump top part


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Use new screws and tighten them crosswise.
Second stage	90°90°90°

expand_moreEngine management

expand_moreCamshaft sensor


S5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreCrankshaft sensor


S5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreKnock sensor


S5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreLambda sensor


Audi gasoline V8 4.2 L CAUA 349 HP	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
All other modifications	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m

expand_moreEngine mounting

expand_moreEngine bracket


On the engine block	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m

expand_moreEngine mounting


At the subframe	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m

expand_moreOn engine bracket


First stage	66.38 lbf⋅ft66.38 lbf⋅ft90 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreSubframe

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP


First stage	84.82 lbf⋅ft84.82 lbf⋅ft115 N⋅m
Replace screws.
Second stage	90°90°90°
Tighten alternately first at the front, then at the rear.

expand_moreAll other modifications


First stage	84.82 lbf⋅ft84.82 lbf⋅ft115 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreSubframe diagonal strut

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP

expand_moreM12 × 42 screws


First stage	66.38 lbf⋅ft66.38 lbf⋅ft90 N⋅m
Use new screws.
Second stage	135°135°135°

expand_moreM12 × 50 screws


First stage	66.38 lbf⋅ft66.38 lbf⋅ft90 N⋅m
Use new screws.
Second stage	90°90°90°

expand_moreAll other modifications

expand_moreFirst stage


With electric servo-steering	66.38 lbf⋅ft66.38 lbf⋅ft90 N⋅m
Use new screw.
With hydraulic servo-steering	66.38 lbf⋅ft66.38 lbf⋅ft90 N⋅m
Use new screw.

expand_moreSecond stage


With electric servo-steering	90°90°90°
With hydraulic servo-steering	135°135°135°

expand_moreExhaust system

expand_moreExhaust manifold

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP


First stage	Tighten by hand
Replace nuts.
Second stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Third stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m


All other modifications	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Tighten new nuts evenly in several steps.

expand_moreExhaust pipe


S5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m
Replace nuts.

expand_moreIgnition system

expand_moreSpark plugs


S5 quattro with gasoline V8 4.2 L 349 HP engine (2007.6–)	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreStart system

expand_moreStarter

expand_moreAudi gasoline V8 4.2 L CAUA 349 HP

expand_moreM12


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Second stage	105°105°105°

expand_moreClass 10.9


M10 × 50 screws	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m

expand_moreAll other modifications


M10 × 50 screws	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2018 Audi A5 S5 user's manual. Keep in mind that all information here is provided “as is” without any warranty of any kind.

Before doing any DIY service please check your insurance policy and Audi warranty policy for your region. In some regions DIY service may invalidate your warranty.

Maintenance Items

Engine Fastener Tightening Specifications
Front Suspension Fastener Tightening Specifications
Rear Suspension Fastener Tightening Specifications
Transmission Fastener Tightening Specifications

Service Intervals

Conquer your fears and never give up!

DIY car service is not as difficult as it looks like and it might save you thousands of dollars per year. It might be even fun and a good thing to do with your kids on a weekend to teach them how basic machinery works. It's really hard to screw something up and damage your car permanently if you use right tools, follow Audi A5 S5 service manual and use right parts and fluids in prescribed amounts. Even modern cars stuffed with electronics can be serviced in your garage or even in your driveway. Changing engine oil, brake fluid, ATF, replacing brake pads, and etc. It's all may be done by yourself in a mater of a couple of hours.

Doing basic service for your 2018 Audi A5 S5 you're not only saving money, but also also improving your technical skills and learning something new.

2018 Audi A5 S5 First generation facelift Engine Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

Audi A5 S5 First generation facelift model years

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