2003 Audi A4 Cabriolet Quattro engine fastener tightening specifications

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Condition	Value

expand_moreAir intake system

expand_moreIntake manifold


All other modifications	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Gradually tighten screws crosswise.

expand_moreAuxiliary assemblies

expand_moreAuxiliary drive belt deflection pulley


All Audi gasoline straight-4 1.8 L BFB engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAuxiliary drive belt tensioner

expand_moreAll Audi gasoline V6 3.0 L ASN engines


M10	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
M8	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m


All Audi gasoline straight-4 1.8 L BFB engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAll other modifications

expand_moreM10


First stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Replace screws.
Second stage	90°90°90°
use only property class 10.9


M8	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m


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

expand_moreAir-conditioning compressor bracket


All Audi gasoline V6 3.0 L ASN engines	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m
All other modifications	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Use screw-locking compound.

expand_moreAir-conditioning compressor pressure line


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
M8	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAlternator

expand_moreAll Audi gasoline V6 3.0 L ASN engines


M10	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
M8	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m


All Audi gasoline straight-4 1.8 L BFB engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
All other modifications	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_morePower steering pump bracket


All Audi gasoline V6 3.0 L ASN engines	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_moreHydraulic lines at the servo-steering pump

expand_more1.8 T quattro with gasoline straight-4 1.8 L 170 HP engine (2003.9–2004.12)


Screws	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
Union nuts	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m
Replace sealing rings.

expand_moreServo pump pulley

expand_moreAll Audi gasoline straight-4 1.8 L AMB engines


With a special tool	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Without special tool	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m


All Audi gasoline V6 3.0 L ASN engines	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m
All other modifications	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreServo steering pump


All Audi gasoline straight-4 1.8 L BFB engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
All other modifications	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m


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

expand_moreCarburetion

expand_moreHigh-pressure pump drive wheel


Central screws	55.32 lbf⋅ft55.32 lbf⋅ft75 N⋅m

expand_moreHigh-pressure pump pulley


Central nuts	51.63 lbf⋅ft51.63 lbf⋅ft70 N⋅m


Injection hoses	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Injection nozzle (injector)	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreInjection pump


M6	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
M8	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_moreCharging

expand_moreTurbo charger

expand_moreAll Audi gasoline straight-4 1.8 L BFB engines


On exhaust manifold	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
Replace screws. Use hot screw paste.

expand_moreTurbocharger bracket

expand_more1.8 T quattro with gasoline straight-4 1.8 L 161 HP, 225 N⋅m at 1950 RPM engine (2003.5–2009.3)


At the turbocharger	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
On the engine block	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreTurbocharger coolant feed line

expand_more1.8 T quattro with gasoline straight-4 1.8 L 161 HP, 225 N⋅m at 1950 RPM engine (2003.5–2009.3)


Banjo screws	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m

expand_moreTurbocharger coolant return line

expand_more1.8 T quattro with gasoline straight-4 1.8 L 161 HP, 225 N⋅m at 1950 RPM engine (2003.5–2009.3)


Union nuts	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreTurbocharger oil feed line

expand_moreAll Audi gasoline straight-4 1.8 L BFB engines


Banjo screws	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Union nuts	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_moreTurbocharger oil return line


All Audi gasoline straight-4 1.8 L BFB engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Replace sealing rings.

expand_moreCooling system

expand_moreCoolant pump


All Audi gasoline V6 3.0 L ASN engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
All Audi gasoline straight-4 1.8 L BFB engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
All other modifications	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreCoolant pump pulley

expand_moreFan wheel

expand_more1.8 T quattro with gasoline straight-4 1.8 L 161 HP, 225 N⋅m at 1950 RPM engine (2003.5–2009.3)


With twin fan	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Otherwise	2.21 lbf⋅ft2.21 lbf⋅ft3 N⋅m

expand_moreCylinder head

expand_moreCamshaft bearing


All other modifications	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
First tighten bearing covers 2 and 4 alternately and in steps

expand_moreCylinder head screws

expand_moreAll other modifications


First stage	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Use new screws.
Second stage	90°90°90°
Third stage	90°90°90°

expand_moreCylinder head screws shank length (new)


All Audi gasoline V6 3.0 L ASN engines	5 in5 in127 mm
All Audi gasoline straight-4 1.8 L BFB engines	4.53 in4.53 in115 mm

expand_moreValve cover


All Audi gasoline V6 3.0 L ASN engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
All Audi gasoline straight-4 1.8 L BFB engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Alternately, first inside and then outside
All other modifications	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
cross-wise from inside to outside

expand_moreEngine block

expand_moreBalance shaft gear wheel

expand_moreConnecting rod bearing


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace and lightly oil the screw.
Second stage	90°90°90°

expand_moreCrankshaft central screws

expand_moreAll Audi gasoline V6 3.0 L ASN engines


First stage	147.51 lbf⋅ft147.51 lbf⋅ft200 N⋅m
Replace screws.
Second stage	90°90°90°
Third stage	90°90°90°

expand_moreAll Audi gasoline straight-4 1.8 L BFB engines


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

expand_moreCrankshaft pulley


All Audi gasoline V6 3.0 L ASN engines	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_moreAll Audi gasoline straight-4 1.8 L BFB engines


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

expand_moreEngine block closure screws


All Audi gasoline V6 3.0 L ASN engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreFlywheel

expand_moreAll other modifications

expand_more22,5 mm screws


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

expand_more35 mm screws


First stage	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Replace screws.
Second stage	180°180°180°

expand_more43 mm screws


First stage	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Replace screws.
Second stage	180°180°180°

expand_moreMain bearing

expand_moreAll Audi gasoline V6 3.0 L ASN engines


First stage	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
Use new screws.
Second stage	90°90°90°
Tighten the screws cross-wise from inside to outside.

expand_moreLateral-fitting screw


Third stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Fourth stage	90°90°90°

expand_moreAll Audi gasoline straight-4 1.8 L BFB engines


First stage	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m
Use new screws.
Second stage	90°90°90°

expand_moreAll other modifications


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Tighten the screws cross-wise from inside to outside.
Second stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Use new screws.
Third stage	90°90°90°

expand_moreVibration damper


All Audi gasoline V6 3.0 L ASN engines	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_moreAll Audi gasoline straight-4 1.8 L BFB engines


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

expand_moreEngine control

expand_moreBottom part of the control unit housing

expand_moreCamshaft adjuster


1.8 T quattro with gasoline straight-4 1.8 L 161 HP, 225 N⋅m at 1950 RPM engine (2003.5–2009.3)	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreCamshaft drive belt deflection pulley


All Audi gasoline V6 3.0 L ASN engines	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
All Audi gasoline straight-4 1.8 L BFB engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreCamshaft timing chain tensioner

expand_moreCamshaft timing gear

expand_moreAll Audi gasoline V6 3.0 L ASN engines


Left	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m
Right	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m


All Audi gasoline straight-4 1.8 L BFB engines	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m

expand_moreControl drive chain tensioner

expand_moreControl drive chain tensioning rail

expand_moreControl drive sprocket wheel

expand_moreControl drive timing chain slip rail

expand_moreDrive belt tensioner device


All Audi gasoline V6 3.0 L ASN engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
All Audi gasoline straight-4 1.8 L BFB engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m


High pressure pump belt deflection pulley	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_moreInlet camshaft wheel


All Audi gasoline V6 3.0 L ASN engines	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m

expand_moreOil pump drive chain tensioner


All Audi gasoline straight-4 1.8 L BFB engines	11.8 lbf⋅ft11.8 lbf⋅ft16 N⋅m
do not dismantle

expand_moreOutlet camshaft wheel


All Audi gasoline V6 3.0 L ASN engines	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m


Tension rail bearing screws	8.85 lbf⋅ft8.85 lbf⋅ft12 N⋅m

expand_moreTiming case cover


M6	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
M8	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_moreTiming case cover first cylinder row

expand_moreTiming case cover second cylinder row


Toothed belt guard	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
Toothed belt guard, rear
Toothed belt guard at the bottom	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Use screw-locking compound.

expand_moreToothed belt guard at the top


3.0 quattro with gasoline V6 3.0 L 217 HP engine (2003.5–2005.12)	4.43 lbf⋅ft4.43 lbf⋅ft6 N⋅m
Replace screws.

expand_moreToothed belt guard center


1.8 T quattro with gasoline straight-4 1.8 L 161 HP, 225 N⋅m at 1950 RPM engine (2003.5–2009.3)	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Use screw-locking compound.

expand_moreToothed belt tensioning roller

expand_moreAll Audi gasoline V6 3.0 L ASN engines

expand_moreM10 × 65 screws


With tensioning roller eccentric	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreWith hydraulic tensioning device


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


All Audi gasoline straight-4 1.8 L BFB engines	19.91 lbf⋅ft19.91 lbf⋅ft27 N⋅m

expand_moreEngine lubrication

expand_moreOil cooler


All Audi gasoline V6 3.0 L ASN engines	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
All Audi gasoline straight-4 1.8 L BFB engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All other modifications	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreOil drain plug


All other modifications	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreOil filter housing

expand_moreOil lines

expand_more1.8 T quattro with gasoline straight-4 1.8 L 161 HP, 225 N⋅m at 1950 RPM engine (2003.5–2009.3)


Screws	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Union nuts	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_moreOil pump chain wheel

expand_moreAll Audi gasoline V6 3.0 L ASN engines


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


All Audi gasoline straight-4 1.8 L BFB engines	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
All other modifications	45.73 lbf⋅ft45.73 lbf⋅ft62 N⋅m
Property class 10.9

expand_moreOil sump

expand_moreAll Audi gasoline V6 3.0 L ASN engines

expand_moreAt the gearbox


Oil sump top part	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m


Oil sump lower part	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Gradually tighten screws crosswise.

expand_moreOn the engine block (M7)


Oil sump top part	11.8 lbf⋅ft11.8 lbf⋅ft16 N⋅m

expand_moreOn the engine block (M8)


Oil sump top part	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreAll Audi gasoline straight-4 1.8 L BFB engines


M10	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
M7	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Gradually tighten screws crosswise.

expand_moreAll other modifications

expand_moreAt the gearbox


Oil sump top part	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreOil sump lower part


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace screws.
Second stage	90°90°90°
Gradually tighten screws crosswise.

expand_moreOn the engine block


Oil sump top part	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Gradually tighten screws crosswise.

expand_moreEngine management

expand_moreCamshaft sensor


All Audi gasoline V6 3.0 L ASN engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m


Charge air pressure sensor	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Crankshaft sensor	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Glow plugs	12.54 lbf⋅ft12.54 lbf⋅ft17 N⋅m

expand_moreKnock sensor


1.8 T quattro with gasoline straight-4 1.8 L 161 HP, 225 N⋅m at 1950 RPM engine (2003.5–2009.3)	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m


Lambda sensor	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m

expand_moreEngine mounting

expand_moreEngine bracket


All Audi gasoline V6 3.0 L ASN engines	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
on the engine block


Engine mounting	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_moreTorque arm

expand_moreAll Audi gasoline V6 3.0 L ASN engines


M10	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreAll Audi gasoline straight-4 1.8 L BFB engines


M10	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
M8	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAll other modifications


M10	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
M8	20.65 lbf⋅ft20.65 lbf⋅ft28 N⋅m

expand_moreExhaust system

expand_moreCatalytic converter

expand_moreAll Audi gasoline straight-4 1.8 L BFB engines


At the turbocharger	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace seals and nuts.

expand_moreExhaust manifold


All Audi gasoline straight-4 1.8 L BFB engines	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace nuts.
All other modifications	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace the nuts and use fitting paste


Exhaust pipe	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace nuts.
Exhaust pipe bracket	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreFuel supply

expand_moreFuel filter bracket


All Audi gasoline V6 3.0 L ASN engines	10.62 lbf⋅in10.62 lbf⋅in1.2 N⋅m
All Audi gasoline straight-4 1.8 L BFB engines	10.62 lbf⋅in10.62 lbf⋅in1.2 N⋅m

expand_moreIgnition system


Spark plugs	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreStart system

expand_moreStarter


All Audi gasoline V6 3.0 L ASN engines	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreAll Audi gasoline straight-4 1.8 L BFB engines


M10	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
M12	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m


All other modifications	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m
Property class 10.9

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2003 Audi A4 Cabriolet Quattro 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 A4 Cabriolet Quattro 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 2003 Audi A4 Cabriolet Quattro you're not only saving money, but also also improving your technical skills and learning something new.

2003 Audi A4 Cabriolet Quattro B6 Engine Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

Audi A4 Cabriolet Quattro B6 model years

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