expand_moreHydraulic lines at the servo-steering pump
expand_moreM6
Screws
6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
Union nuts
28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m
Servo pump pulley
16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Servo steering pump
14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Vacuum pump
6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
expand_moreCarburetion
expand_moreInjection pump
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_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_moreScrews (M6)
Fourth stage
6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
expand_moreScrews 1 – 8
First stage
29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Replace screws.
Second stage
90°90°90°
Third stage
90°90°90°
Valve cover
6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
Tighten cross-wise.
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
First stage
36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Replace screws.
Second stage
90°90°90°
expand_moreCrankshaft pulley
First stage
14.75 lbf⋅ft14.75 lbf⋅ft20 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_moreFlywheel
To drive plate
44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Replace screws.
expand_moreEngine control
Camshaft timing chain tensioner
6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
Control drive chain tensioner
6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
expand_moreControl drive sprocket wheel
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_moreOil pump drive chain tensioner
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_moreTiming case cover
expand_moreScrew 1
First stage
2.21 lbf⋅ft2.21 lbf⋅ft3 N⋅m
Replace screws.
expand_moreScrews 1, 2, 3, 6, and 8
Third stage
90°90°90°
expand_moreScrews 2 – 11
Second stage
2.21 lbf⋅ft2.21 lbf⋅ft3 N⋅m
Use new screws and tighten them crosswise.
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_moreScrews 9 – 11
expand_moreFourth stage
First step
5.9 lbf⋅ft5.9 lbf⋅ft8 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_moreEngine lubrication
Oil drain plug
22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
expand_moreOil filter housing
Oil filter cover
18.44 lbf⋅ft18.44 lbf⋅ft25 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_moreOil sump lower part
First stage
3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Use new screws and tighten them crosswise.
Second stage
90°90°90°
expand_moreEngine management
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
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_moreOn chassis
First stage
84.82 lbf⋅ft84.82 lbf⋅ft115 N⋅m
Replace screws.
Second stage
90°90°90°
expand_moreSubframe diagonal strut
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_moreExhaust system
Catalytic converter
16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m
Exhaust manifold
18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Tighten new nuts evenly in several steps.
expand_moreFuel supply
expand_moreFuel lines
High-pressure side
19.91 lbf⋅ft19.91 lbf⋅ft27 N⋅m
expand_moreIgnition system
Spark plugs
22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
expand_moreStart system
expand_moreStarter
M10
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 2008 Audi A4 S4 Avant 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.
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 S4 Avant 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 2008 Audi A4 S4 Avant you're not only saving money, but also also improving your technical skills and learning something new.
2008 Audi A4 S4 Avant generations
In 2008 Audi offered 2 generations of the A4 S4 Avant. Engine fastener tightening specifications may vary in different generations. Be sure that you are looking at the rigt modification.