2003 Audi A8 engine fastener tightening specifications

in your garage to make future searches easy.

Condition	Value

expand_moreAir intake system

expand_moreIntake manifold


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

expand_moreAuxiliary assemblies


Auxiliary drive belt deflection pulley	29.5 lbf⋅ft29.5 lbf⋅ft40 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

expand_moreAll Audi gasoline V6 3.0 L BBJ engines


At the bracket	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m
On the engine block	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 bracket


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


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

expand_moreAlternator


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


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

expand_moreServo pump pulley


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

expand_moreServo steering pump


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

expand_moreVacuum pump

expand_moreCarburetion


Fuel-distributing pipe	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreHigh-pressure pump

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 V6 3.0 L BBJ engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m


Coolant pump pulley	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Fan wheel	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Radiator mounting	4.43 lbf⋅ft4.43 lbf⋅ft6 N⋅m

expand_moreCylinder head

expand_moreCamshaft bearing


All Audi gasoline V6 3.0 L ASN engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Tighten in steps from inside to outside.
All Audi gasoline V6 3.0 L BBJ engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Tighten in steps from inside to outside.

expand_moreCylinder head screws

expand_moreAll Audi gasoline V6 3.0 L ASN engines

Figure 1. Cylinder head, Cylinder head screws, Audi gasoline V6 3.0 L ASN.


First stage	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Use new screws. See figure 1.
Second stage	90°90°90°
Third stage	90°90°90°

expand_moreAll Audi gasoline V6 3.0 L BBJ engines


First stage	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Use new screws. See figure 1.
Second stage	90°90°90°
Third stage	90°90°90°


Cylinder head screws shank length (new)	5 in5 in127 mm

expand_moreValve cover


All Audi gasoline V6 3.0 L ASN engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
See figure 2.

All Audi gasoline V6 3.0 L BBJ engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
See figure 2.

expand_moreEngine block

expand_moreConnecting rod bearing

expand_moreAll Audi gasoline V6 3.0 L ASN engines


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

expand_moreAll Audi gasoline V6 3.0 L BBJ engines


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

expand_moreCrankshaft central screws


First stage	147.51 lbf⋅ft147.51 lbf⋅ft200 N⋅m
Use new screw.
Second stage	180°180°180°


Crankshaft pulley	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m
Replace bolt.

expand_moreEngine block closure screws


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

expand_moreFlywheel

expand_moreAll Audi gasoline V6 3.0 L ASN engines

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_moreAll Audi gasoline V6 3.0 L BBJ engines

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_moreScrews


First stage	Tighten by hand
Replace screws and nuts.
Fourth stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Fifth stage	90°90°90°

expand_moreNuts


Second stage	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
from inside to outside
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
All Audi gasoline V6 3.0 L BBJ engines	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_moreEngine control


Camshaft drive belt deflection pulley	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
Camshaft timing chain tensioner	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

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_moreDrive belt tensioner device


Tensioning lever	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
Tensioning roller	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreInlet camshaft wheel


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

expand_moreOil pump drive chain tensioner


All Audi gasoline V6 3.0 L ASN engines	8.85 lbf⋅ft8.85 lbf⋅ft12 N⋅m

expand_moreOutlet camshaft wheel


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

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°


Toothed belt guard at the bottom	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Toothed belt guard at the top	4.43 lbf⋅ft4.43 lbf⋅ft6 N⋅m
Replace screws.

expand_moreToothed belt guard center


3.0 with gasoline V6 3.0 L 215 HP engine (2003.7–2006.5)	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m


Toothed belt tensioning roller	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
Toothed belt tightener	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreTop part of control unit housing

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 V6 3.0 L BBJ engines	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m


Oil drain plug	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreOil pump

expand_moreAll Audi gasoline V6 3.0 L ASN engines

expand_moreNuts


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace nuts. Use screw-locking compound.
Second stage	120°120°120°


Screws	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Replace screws.

expand_moreAll Audi gasoline V6 3.0 L BBJ engines

expand_moreNuts


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace nuts. Use screw-locking compound.
Second stage	120°120°120°


Screws	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Replace screws.

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°

expand_moreAll Audi gasoline V6 3.0 L BBJ engines


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

expand_moreOil sump

expand_moreAll Audi gasoline V6 3.0 L ASN engines


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

expand_moreOil sump top part


M10	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
M7	11.8 lbf⋅ft11.8 lbf⋅ft16 N⋅m
M8	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreAll Audi gasoline V6 3.0 L BBJ engines

expand_moreOil sump top part


M10	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
M7	11.8 lbf⋅ft11.8 lbf⋅ft16 N⋅m
M8	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m


Oil sump lower part	7.38 lbf⋅ft7.38 lbf⋅ft10 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
All Audi gasoline V6 3.0 L BBJ engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreKnock sensor


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

expand_moreEngine mounting

expand_moreEngine bracket

expand_moreEngine mounting


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

expand_moreSubframe


M10	50.15 lbf⋅ft50.15 lbf⋅ft68 N⋅m

expand_moreM14


First stage	110.63 lbf⋅ft110.63 lbf⋅ft150 N⋅m
Replace screws.
Second stage	90°90°90°


Torque arm	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m

expand_moreExhaust system

expand_moreCatalytic converter

expand_moreExhaust manifold


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

expand_moreExhaust pipe


All Audi gasoline V6 3.0 L ASN engines	19.91 lbf⋅ft19.91 lbf⋅ft27 N⋅m
With catalytic converter
All Audi gasoline V6 3.0 L BBJ engines	19.91 lbf⋅ft19.91 lbf⋅ft27 N⋅m
With catalytic converter


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

expand_moreIgnition system


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

expand_moreStart system


Starter	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 2003 Audi A8 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

Chassis and Body Fastener Tightening Specifications
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 A8 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 A8 you're not only saving money, but also also improving your technical skills and learning something new.

2003 Audi A8 D3 Engine Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

Audi A8 D3 model years

Suggest edit