1994 Audi A6 Quattro engine fastener tightening specifications

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Condition	Value

expand_moreAir intake system

expand_moreIntake manifold


All other modifications	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreAuxiliary assemblies

expand_moreAuxiliary drive belt tensioner


All Audi gasoline straight-5 2.3 L AAR engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
All other modifications	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m


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

expand_moreAir-conditioning compressor bracket


All other modifications	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m


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

expand_moreAlternator


All Audi gasoline straight-5 2.3 L AAR engines	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreAll Audi gasoline straight-4 2.0 L ACE engines


Nuts	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
Top	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAll other modifications


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

expand_morePower steering pump bracket


All Audi gasoline straight-5 2.3 L AAR engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
All Audi gasoline straight-4 2.0 L ACE engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreServo pump pulley


All Audi gasoline straight-5 2.3 L AAR engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
All Audi gasoline straight-4 2.0 L ACE engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All other modifications	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreServo steering pump


All Audi gasoline straight-5 2.3 L AAR engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
All Audi gasoline straight-4 2.0 L ACE engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All other modifications	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreCooling system

expand_moreCoolant pump

expand_moreAll Audi gasoline straight-5 2.3 L AAR engines


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreM8


Hexagon head screws	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Hexagon head screws	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m


All Audi gasoline straight-4 2.0 L ACE engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All other modifications	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m


Coolant pump pulley	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Fan wheel	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreRadiator mounting


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreCylinder head

expand_moreCamshaft bearing


All Audi gasoline straight-4 2.0 L ACE engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
First tighten bearing covers 2 and 4 alternately and in steps
All other modifications	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
First tighten bearing covers 2 and 4 alternately and in steps

expand_moreCylinder head screws


Third stage	90°90°90°

expand_moreAll Audi gasoline straight-5 2.3 L AAR engines

Figure 1. Cylinder head, Cylinder head screws, Audi gasoline straight-5 2.3 L AAR.


First stage	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Use new screws. See figure 1.
Second stage	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Fourth stage	90°90°90°

expand_moreAll Audi gasoline straight-4 2.0 L ACE engines


First stage	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Use new screws. See figure 1.
Second stage	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Fourth stage	90°90°90°

expand_moreAll other modifications

Figure 2. Cylinder head, Cylinder head screws, All other modifications.


First stage	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Use new screws. See figure 2.
Second stage	90°90°90°

expand_moreCylinder head screws shank length (new)


All Audi gasoline straight-5 2.3 L AAR engines	3.78 in3.78 in96 mm
All Audi gasoline straight-4 2.0 L ACE engines	5.59 in5.59 in142 mm
All other modifications	5.41 in5.41 in137.5 mm

expand_moreValve cover

expand_moreAll Audi gasoline straight-5 2.3 L AAR engines


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Tighten cross-wise.
Second stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Third stage	8.85 lbf⋅ft8.85 lbf⋅ft12 N⋅m


All other modifications	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Alternately, first inside and then outside

expand_moreEngine block

expand_moreConnecting rod bearing

expand_moreAll other modifications


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

expand_moreCrankshaft central screws

expand_moreAll Audi gasoline straight-5 2.3 L AAR engines


Special tool 2079	258.15 lbf⋅ft258.15 lbf⋅ft350 N⋅m
Use new screw.
Otherwise	331.9 lbf⋅ft331.9 lbf⋅ft450 N⋅m
Use new screw.

expand_moreAll Audi gasoline straight-4 2.0 L ACE engines


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

expand_moreAll other modifications


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

expand_moreCrankshaft pulley


All Audi gasoline straight-5 2.3 L AAR engines	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreAll Audi gasoline straight-4 2.0 L ACE engines


Class 10.9	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Class 8.8 screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m


All other modifications	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m


Engine block closure screws	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreFlywheel

expand_moreAll Audi gasoline straight-5 2.3 L AAR engines

expand_more22,5 mm screws


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

expand_more43 mm screws


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

expand_moreAll Audi gasoline straight-4 2.0 L ACE engines


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

expand_moreDual-mass flywheel


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

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_more43 mm screws


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

expand_moreMain bearing


All Audi gasoline straight-5 2.3 L AAR engines	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m
Use new screws.

expand_moreAll Audi gasoline straight-4 2.0 L ACE engines


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

expand_moreAll other modifications

expand_moreM11


First stage	Tighten by hand
Use new screws.
Second stage	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
cross-wise from inside to outside
Third stage	90°90°90°

expand_moreLateral-fitting screw


Fourth stage	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreVibration damper

expand_moreAll Audi gasoline straight-4 2.0 L ACE engines


Class 10.9	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Class 8.8 screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m


All other modifications	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreEngine control


Camshaft adjuster	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreCamshaft drive belt deflection pulley

expand_moreAll other modifications


M10	31.72 lbf⋅ft31.72 lbf⋅ft43 N⋅m
M8	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreCamshaft timing gear

expand_moreAll Audi gasoline V6 2.6 L ABC engines


Left	51.63 lbf⋅ft51.63 lbf⋅ft70 N⋅m
Replace bolt.
Right	51.63 lbf⋅ft51.63 lbf⋅ft70 N⋅m
Replace bolt.


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

expand_moreDrive belt tensioner device

expand_moreAll Audi gasoline straight-5 2.3 L AAR engines


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreM8


Hexagon head screws	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Hexagon head screws	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreToothed belt guard


All Audi gasoline straight-4 2.0 L ACE engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Toothed belt guard, rear
All other modifications	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Use screw-locking compound.

expand_moreToothed belt guard at the bottom


All Audi gasoline straight-5 2.3 L AAR engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreAll Audi gasoline straight-4 2.0 L ACE engines


Nuts	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Screws	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreAll other modifications

expand_moreLeft


Top	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m


Otherwise	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreToothed belt guard at the top


All Audi gasoline straight-4 2.0 L ACE engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreToothed belt tensioning roller

expand_moreAll Audi gasoline straight-4 2.0 L ACE engines


M10	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
M8	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAll other modifications


M6	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
M8	31.72 lbf⋅ft31.72 lbf⋅ft43 N⋅m

expand_moreToothed belt tightener

expand_more2.3 quattro with gasoline straight-5 2.3 L 131 HP, 186 N⋅m engine (1994.6–1995.12)


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreEngine lubrication

expand_moreOil cooler


All Audi gasoline straight-4 2.0 L ACE engines	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
All other modifications	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreOil drain plug


All Audi gasoline straight-5 2.3 L AAR engines	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
All Audi gasoline straight-4 2.0 L ACE engines	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
All other modifications	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m

expand_moreOil sump

expand_moreAll Audi gasoline straight-5 2.3 L AAR engines

expand_moreAt the gearbox


M10	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
M8	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreOn the engine block


M8	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m


Otherwise	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
use only property class 10.9

expand_moreAll Audi gasoline straight-4 2.0 L ACE engines


One-part sump	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws.

expand_moreAll other modifications

expand_moreAt the gearbox


M10	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
M8	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m


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

expand_moreOn the engine block


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

expand_moreEngine management


Crankshaft sensor	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Knock sensor	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Lambda sensor	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m

expand_moreEngine mounting


Engine bracket	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
on the engine block

expand_moreEngine mounting


All Audi gasoline straight-5 2.3 L AAR engines	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
All Audi gasoline straight-4 2.0 L ACE engines	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m

expand_moreTorque arm


All Audi gasoline straight-5 2.3 L AAR engines	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreAll Audi gasoline straight-4 2.0 L ACE engines

expand_moreAt the crossmember


With air-conditioning	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Without air-conditioning system	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreOn the engine block


With air-conditioning	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m
Without air-conditioning system	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreAll other modifications


At the crossmember	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Replace screws.
On the engine block	30.98 lbf⋅ft30.98 lbf⋅ft42 N⋅m
Replace screws.

expand_moreExhaust system

expand_moreCatalytic converter


Front	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m


Exhaust manifold	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace screws and nuts.
Exhaust pipe	22.13 lbf⋅ft22.13 lbf⋅ft30 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 straight-4 2.0 L ACE engines	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
All other modifications	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m

expand_moreFuel lines


All Audi gasoline straight-5 2.3 L AAR engines	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m

expand_moreAll Audi gasoline straight-4 2.0 L ACE engines


Fuel lines	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m
Pressure controller	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m


All other modifications	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Banjo bolts.

expand_moreIgnition system


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

expand_moreStart system

expand_moreStarter

expand_moreAll other modifications


M10	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m
M12	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 1994 Audi A6 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 A6 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 1994 Audi A6 Quattro you're not only saving money, but also also improving your technical skills and learning something new.

1994 Audi A6 Quattro C4 Engine Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

Audi A6 Quattro C4 model years

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