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Condition Value
expand_moreAir intake system
expand_moreIntake manifold
M6 7.38 lbf⋅ft
M7 11.06 lbf⋅ft
M8 16.23 lbf⋅ft
expand_moreCylinder head
expand_moreCamshaft bearing
Inlet camshaft 6.64 lbf⋅ft
Replace aluminum screws.
expand_moreOutlet camshaft
First stage 5.9 lbf⋅ft
Replace aluminum screws.
Second stage 60°
Install bearing using special tool.
M6 7.38 lbf⋅ft
M7 10.33 lbf⋅ft
M8 14.75 lbf⋅ft
expand_moreCylinder head screws
expand_moreMagnesium valve cover
expand_moreScrews 1 – 14
Figure 1. Cylinder head, Cylinder head screws, BMW gasoline straight-6 3.0 L N52 B30 A 255 HP, Magnesium valve cover, Screws 1 – 14.
Figure 1. Cylinder head, Cylinder head screws, BMW gasoline straight-6 3.0 L N52 B30 A 255 HP, Magnesium valve cover, Screws 1 – 14.
First stage 22.13 lbf⋅ft
Replace screws. See figure 1.
Second stage 90°
Fourth stage 45°
expand_moreScrews 1 – 10
Third stage 90°
expand_moreScrews 15 – 18
Fifth stage 11.06 lbf⋅ft
Replace screws.
Sixth stage 90°
expand_morePlastic valve cover
expand_moreScrews 1 – 14
First stage 22.13 lbf⋅ft
Replace screws. See figure 1.
Second stage 90°
Fourth stage 45°
expand_moreScrews 1 – 10
Third stage 90°
expand_moreScrews 15 – 18
Fifth stage 7.38 lbf⋅ft
Replace screws.
expand_moreScrews 15 – 17
Sixth stage 90°
expand_moreScrew 18
Seventh stage 135°
Figure 2. Cylinder head, Cylinder head screws, BMW gasoline V8 4.4 L N62 B44 A 329 HP.
Figure 2. Cylinder head, Cylinder head screws, BMW gasoline V8 4.4 L N62 B44 A 329 HP.
First stage 22.13 lbf⋅ft
See figure 2.
Second stage 90°
Third stage 90°
expand_moreValve cover
expand_moreMagnesium valve cover
First stage 5.16 lbf⋅ft
Replace screws.
Second stage 90°
Plastic valve cover 6.64 lbf⋅ft
expand_moreAll other modifications
M6 7.38 lbf⋅ft
M7 11.06 lbf⋅ft
expand_moreEngine block
expand_moreConnecting rod bearing
First stage 14.75 lbf⋅ft
Replace screw, wash and slightly oil.
Second stage 120°
expand_moreCrankshaft central screws
First stage 73.76 lbf⋅ft
Replace bolt.
Second stage 60°
Third stage 60°
Fourth stage 60°
expand_moreDrive plate
expand_moreN52 engine
Magnesium valve cover 88.51 lbf⋅ft
Replace screws.
expand_morePlastic valve cover screws of N52 engine
First stage 22.13 lbf⋅ft
Replace screws.
Second stage 92.2 lbf⋅ft
BMW gasoline V8 4.4 L N62 B44 A 329 HP 77.44 lbf⋅ft
Replace screws.
expand_moreFlywheel
N52 engine 88.51 lbf⋅ft
Replace screws.
BMW gasoline V8 4.4 L N62 B44 A 329 HP 88.51 lbf⋅ft
Lightly lubricate the screws thread.
expand_moreMain bearing
expand_moreM10 × 100 screws
First stage 14.75 lbf⋅ft
Replace screws.
Second stage 70°
expand_moreM10 × 27 screws
First stage 11.06 lbf⋅ft
Replace bolts.
Second stage 90°
expand_moreM10 × 41 screws
First stage 11.06 lbf⋅ft
Replace bolts.
Second stage 90°
expand_moreM8 × 37 screws
First stage 5.9 lbf⋅ft
Replace bolts.
Second stage 90°
expand_moreVibration damper
M8 × 16 screws (class 10.9) 25.81 lbf⋅ft
M8 × 20 screws (class 8.8) 18.44 lbf⋅ft
expand_moreEngine control
expand_moreCamshaft timing chain guide rail
expand_moreBearing screws
M7 10.33 lbf⋅ft
expand_moreM18
Cap 18.44 lbf⋅ft
expand_moreCamshaft timing chain slip rail
expand_more630 i with gasoline straight-6 3.0 L 255 HP engine (2004.9–2010.7)
expand_moreAt the cylinder head
M6 × 35 screws 5.9 lbf⋅ft
expand_moreCamshaft timing chain tensioner
expand_more630 i with gasoline straight-6 3.0 L 255 HP engine (2004.9–2010.7)
expand_moreN52 engine
Magnesium valve cover 36.88 lbf⋅ft
Replace sealing rings.
Plastic valve cover 40.57 lbf⋅ft
Replace sealing rings.
expand_moreCamshaft timing chain tensioning rail
expand_more630 i with gasoline straight-6 3.0 L 255 HP engine (2004.9–2010.7)
expand_moreBearing screws
M8 14.75 lbf⋅ft
expand_moreM22
Cap 36.88 lbf⋅ft
expand_moreCamshaft timing gear
645 Ci with gasoline V8 4.4 L 329 HP engine (2004.1–2005.8) 59 lbf⋅ft
Replace bolt.
expand_moreChain tensioner
M22 × 1,5 screws 40.57 lbf⋅ft
Cap 29.5 lbf⋅ft
Chain tensioner 47.94 lbf⋅ft
expand_moreInlet camshaft wheel
expand_moreM10
First stage 14.75 lbf⋅ft
Use new screw.
Second stage 180°
expand_moreOutlet camshaft wheel
expand_moreM10
First stage 14.75 lbf⋅ft
Use new screw.
Second stage 180°
expand_moreEngine lubrication
expand_moreOil drain plug
BMW gasoline straight-6 3.0 L N52 B30 A 255 HP 18.44 lbf⋅ft
BMW gasoline V8 4.4 L N62 B44 A 329 HP 25.81 lbf⋅ft
expand_moreOil filter housing
645 Ci with gasoline V8 4.4 L 329 HP engine (2004.1–2005.8) 18.44 lbf⋅ft
expand_moreOil sump
First stage 5.9 lbf⋅ft
Replace screws.
Second stage 90°
expand_moreM8 × 112 and M8 × 92 screws
First stage 5.9 lbf⋅ft
Replace screws.
Second stage 180°
expand_moreOil sump top part M6 screws (class 10.9)
Oil sump lower part 8.85 lbf⋅ft
expand_moreOil sump top part M6 screws (class 8.8)
Oil sump lower part 7.38 lbf⋅ft
expand_moreOil sump top part M8 screws (class 8.8)
Oil sump lower part 16.23 lbf⋅ft
expand_moreEngine management
expand_moreKnock sensor
BMW gasoline straight-6 3.0 L N52 B30 A 255 HP 14.75 lbf⋅ft
Lambda sensor 36.88 lbf⋅ft
expand_moreExhaust system
expand_moreExhaust manifold
M6 7.38 lbf⋅ft
Replace nuts.
M7 11.06 lbf⋅ft
Replace nuts.
M8 16.96 lbf⋅ft
Replace nuts.
M6 7.38 lbf⋅ft
Replace nuts.
M7 11.06 lbf⋅ft
Replace nuts.
M8 16.96 lbf⋅ft
Replace nuts.
expand_moreIgnition system
expand_moreSpark plugs
BMW gasoline straight-6 3.0 L N52 B30 A 255 HP 16.96 lbf⋅ft
BMW gasoline V8 4.4 L N62 B44 A 329 HP 16.96 lbf⋅ft

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2004 BMW 6 Series Sedan 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 BMW warranty policy for your region. In some regions DIY service may invalidate your warranty.

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 BMW 6 Series Sedan 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 2004 BMW 6 Series Sedan you're not only saving money, but also also improving your technical skills and learning something new.

BMW 6 Series Sedan Second generation model years

Units:
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