2009 BMW Z4 engine fastener tightening specifications

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Condition	Value

expand_moreAir intake system

expand_moreIntake manifold

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP


M7	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m

expand_moreAll other modifications


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
M7	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
M8	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreAuxiliary assemblies

expand_moreAir-conditioning compressor

expand_moreM8


At the bracket	15.49 lbf⋅ft15.49 lbf⋅ft21 N⋅m

expand_moreAlternator

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP

expand_moreOnto crankcase (M8)


First stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Use new screws.
Second stage	190°190°190°

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP

expand_moreOnto crankcase


M8	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreAll other modifications

expand_moreOnto crankcase


M10	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m

expand_moreCarburetion

expand_moreHigh-pressure line

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP

expand_moreAt the cylinder head


M7	8.11–11.06 lbf⋅ft8.11–11.06 lbf⋅ft11–15 N⋅m

expand_moreOn high-pressure pump


M14	19.91–24.34 lbf⋅ft19.91–24.34 lbf⋅ft27–33 N⋅m

expand_moreOn injector


M12	14.75–19.18 lbf⋅ft14.75–19.18 lbf⋅ft20–26 N⋅m

expand_moreAll other modifications

expand_moreOn high-pressure pump


M14	19.91–24.34 lbf⋅ft19.91–24.34 lbf⋅ft27–33 N⋅m

expand_moreOn injector


M12	14.75–19.18 lbf⋅ft14.75–19.18 lbf⋅ft20–26 N⋅m

expand_moreHigh-pressure pump


M6	8.85 lbf⋅ft8.85 lbf⋅ft12 N⋅m
Tighten bolts uniformly in several passes.

expand_moreCooling system

expand_moreCoolant drain plug

expand_moreOnto crankcase


M14	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Replace sealing rings and screws.

expand_moreCylinder head

expand_moreCamshaft bearing

expand_moreAll BMW gasoline straight-6 2.5 L N52 B25 A engines


Inlet camshaft	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
Replace aluminum screws.

expand_moreOutlet camshaft


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace aluminum screws.
Second stage	60°60°60°

expand_moreAll other modifications

expand_moreInlet camshaft


M6 × 30 screws	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreOutlet camshaft


M6 × 50 screws	8.85 lbf⋅ft8.85 lbf⋅ft12 N⋅m

expand_moreCylinder head screws

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP

expand_moreScrews 1 – 14

Figure 1. Cylinder head, Cylinder head screws, BMW gasoline straight-6 2.5 L N52 B25 A 201 HP, Screws 1 – 14.


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace screws. See figure 1.
Second stage	90°90°90°
Fourth stage	45°45°45°

expand_moreScrews 1 – 10


Third stage	90°90°90°

expand_moreScrews 15 – 18


Fifth stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Replace screws.

expand_moreScrews 15 – 17


Sixth stage	90°90°90°

expand_moreScrew 18


Seventh stage	135°135°135°

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP

expand_moreScrews 1 – 14


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace screws. See figure 1.
Second stage	90°90°90°
Fourth stage	45°45°45°

expand_moreScrews 1 – 10


Third stage	90°90°90°

expand_moreScrews 15 – 18


Fifth stage	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Replace screws.

expand_moreAll other modifications

expand_moreScrews 1 – 6

Figure 2. Cylinder head, Cylinder head screws, All other modifications, Screws 1 – 6.


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace screws. See figure 2.
Third stage	90°90°90°
Fifth stage	180°180°180°

expand_moreScrews 7 – 10


Second stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace screws.
Fourth stage	90°90°90°
Sixth stage	180°180°180°

expand_moreScrew 11


Seventh stage	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreValve cover

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP


M7	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m
Replace aluminum screws.

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
M7	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m


All other modifications	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreEngine block

expand_moreBalance shaft gear wheel

expand_moreM10 central screws


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Use new screw.
Second stage	70.07 lbf⋅ft70.07 lbf⋅ft95 N⋅m

expand_moreBalance shaft module


M6 × 25 screws	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreM8 × 40 screws


First stage	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m
Second stage	90°90°90°

expand_moreM8 × 75 screws


First stage	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m
Second stage	90°90°90°

expand_moreConnecting rod bearing

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screw, wash and slightly oil.
Second stage	120°120°120°

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP

expand_moreM9


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace, wash and lubricate the screws.
Second stage	140°140°140°

expand_moreAll other modifications


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screw, wash and slightly oil.
Second stage	140°140°140°

expand_moreCrankshaft central screws

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP

expand_moreM16


First stage	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m
Replace screws.
Second stage	360°360°360°

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP

expand_moreM16


First stage	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m
Replace the screws and lubricate lightly
Second stage	360°360°360°

expand_moreAll other modifications

expand_moreM18


First stage	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m
Use new screw.
Second stage	270°270°270°

expand_moreCrankshaft pulley


M8 × 16 screws	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m

expand_moreDrive plate

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP

expand_moreN52 engine


Magnesium valve cover	88.51 lbf⋅ft88.51 lbf⋅ft120 N⋅m
Replace screws.

expand_morePlastic valve cover screws of N52 engine


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace screws.
Second stage	92.2 lbf⋅ft92.2 lbf⋅ft125 N⋅m

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace screws.
Second stage	92.2 lbf⋅ft92.2 lbf⋅ft125 N⋅m

expand_moreFlywheel

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP


N52 engine	88.51 lbf⋅ft88.51 lbf⋅ft120 N⋅m
Replace screws.

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP


M12	88.51 lbf⋅ft88.51 lbf⋅ft120 N⋅m
Replace screws.

expand_moreAll other modifications

expand_moreM12


First stage	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
Replace screws.
Second stage	45°45°45°

expand_moreMain bearing

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP

expand_moreM10 × 100 screws


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws.
Second stage	70°70°70°

expand_moreM10 × 27 screws


First stage	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreM10 × 41 screws


First stage	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Replace screws.
Second stage	90°90°90°

expand_moreM8 × 37 screws


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

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP

expand_moreM10 × 100 screws


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws.
Second stage	70°70°70°

expand_moreAll other modifications

expand_moreScrews 1 – 10

Figure 3. Engine block, Main bearing, All other modifications, Screws 1 – 10.


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws. See figure 3.
Second stage	90°90°90°

expand_moreScrews 11 – 30


Third stage	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreVibration damper

expand_moreAll BMW gasoline straight-6 3.0 L N52 B30 A engines


M8 × 16 screws (class 10.9)	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m
M8 × 20 screws (class 8.8)	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAll other modifications


M8 × 16 screws	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m

expand_moreEngine control

expand_moreCamshaft timing chain guide rail

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP

expand_moreBearing screws


M7	10.33 lbf⋅ft10.33 lbf⋅ft14 N⋅m

expand_moreM18


Cap	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP


M7	10.33 lbf⋅ft10.33 lbf⋅ft14 N⋅m
M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreAll other modifications


M7	10.33 lbf⋅ft10.33 lbf⋅ft14 N⋅m

expand_moreCamshaft timing chain slip rail

expand_moreAt the cylinder head


M6 × 35 screws	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreCamshaft timing chain tensioner


All BMW gasoline straight-6 2.5 L N52 B25 A engines	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
Replace sealing rings.
All BMW gasoline straight-6 3.0 L N52 B30 A engines	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
Replace sealing rings.
All other modifications	59 lbf⋅ft59 lbf⋅ft80 N⋅m

expand_moreCamshaft timing chain tensioning rail

expand_moreBearing screws


M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreM22


Cap	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m

expand_moreCamshaft timing gear

expand_moreVanos (M10 × 94)


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws.
Second stage	180°180°180°

expand_moreChain tensioner


M22 × 1,5 screws	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m

expand_moreInlet camshaft wheel

expand_moreAll BMW gasoline straight-6 2.5 L N52 B25 A engines

expand_moreM10


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws.
Second stage	180°180°180°

expand_moreAll other modifications

expand_moreCentral screws


First stage	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
Second stage	55°55°55°


Oil pump drive chain tensioner	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreOutlet camshaft wheel

expand_moreAll BMW gasoline straight-6 2.5 L N52 B25 A engines

expand_moreM10


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws.
Second stage	180°180°180°

expand_moreAll other modifications

expand_moreCentral screws


First stage	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
Second stage	55°55°55°

expand_moreTiming case cover


M7	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreEngine lubrication

expand_moreOil drain plug

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP


M12 × 1,5 screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace sealing rings.

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP


M12	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace sealing rings.

expand_moreAll other modifications


M12 × 1,5 screws	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace plastic screw.

expand_moreOil filter housing

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP

expand_moreAt the cylinder head


M8	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Replace sealing rings.


Oil filter cover	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace sealing rings.

expand_moreAll other modifications


At the cylinder head	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Oil filter cover	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreOil pump

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP

expand_moreM8 × 123 screws


First stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Second stage	180°180°180°

expand_moreM8 × 31 screws


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

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP

expand_moreM8 × 123 screws


First stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Replace screws.
Second stage	180°180°180°

expand_moreM8 × 31 screws


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

expand_moreAll other modifications

Figure 4. Engine lubrication, Oil pump, All other modifications.


M6 × 70 screws	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
See figure 4.

expand_moreOil pump chain wheel

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP

expand_moreM8 × 20 screws


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Second stage	45°45°45°

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP

expand_moreM8


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Second stage	45°45°45°

expand_moreAll other modifications

expand_moreM10 central screws


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Use new screw.
Second stage	70.07 lbf⋅ft70.07 lbf⋅ft95 N⋅m

expand_moreOil sump

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP

expand_moreAluminium sump M8 × 112 screws


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace screws.
Second stage	180°180°180°

expand_moreSheet-steel sump M8 × 24 screws


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

expand_moreAluminium sump M8 × 26 screws


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

expand_moreAluminium sump M8 × 36 screws


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

expand_moreAluminium sump M8 × 40 screws


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

expand_moreAluminium sump M8 × 92 screws


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace screws.
Second stage	180°180°180°

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP

expand_moreM8 × 112 screws

expand_moreWith aluminium sump


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace screws.
Second stage	180°180°180°

expand_moreAluminium sump M8 × 26 screws


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace screws.
Second stage	60°60°60°

expand_moreM8 × 36 screws

expand_moreWith aluminium sump


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

expand_moreAll other modifications


Plastic oil sump	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreEngine management

expand_moreCamshaft sensor

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP


M6	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreAll other modifications


M6	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreCrankshaft sensor

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP


M6	2.21 lbf⋅ft2.21 lbf⋅ft3 N⋅m

expand_moreAll other modifications


M6	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreKnock sensor

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP


M8	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreAll other modifications


M8 × 30 screws	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m


Lambda sensor	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m

expand_moreEngine mounting

expand_moreClass 10.9


M10	41.3 lbf⋅ft41.3 lbf⋅ft56 N⋅m
M8	20.65 lbf⋅ft20.65 lbf⋅ft28 N⋅m

expand_moreSubframe


M12	79.66 lbf⋅ft79.66 lbf⋅ft108 N⋅m

expand_moreExhaust system

expand_moreCatalytic converter

expand_moreM8


At the bracket	20.65 lbf⋅ft20.65 lbf⋅ft28 N⋅m

expand_moreExhaust manifold

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP


M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Use assembly paste

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP


M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace nuts.

expand_moreAll other modifications

Figure 5. Exhaust system, Exhaust manifold, All other modifications.


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace nuts. See figure 5.
Second stage	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m

expand_moreIgnition system

expand_moreSpark plugs


M12	14.75–19.18 lbf⋅ft14.75–19.18 lbf⋅ft20–26 N⋅m
M14	19.91–24.34 lbf⋅ft19.91–24.34 lbf⋅ft27–33 N⋅m

expand_moreStart system

expand_moreStarter

expand_moreBMW gasoline straight-6 2.5 L N52 B25 A 201 HP

expand_moreOnto crankcase

expand_moreM10 × 30 screws


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

expand_moreM10 × 85 screws


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws.
Second stage	180°180°180°

expand_moreBMW gasoline straight-6 3.0 L N54 B30 A 302 HP


M10	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m

expand_moreAll other modifications

expand_moreOnto crankcase


M10	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2009 BMW Z4 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.

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 BMW Z4 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 2009 BMW Z4 you're not only saving money, but also also improving your technical skills and learning something new.

2009 BMW Z4 generations

In 2009 BMW offered 2 generations of the Z4. Engine fastener tightening specifications may vary in different generations. Be sure that you are looking at the rigt modification.

First generation LCI

E85

2009 BMW Z4 Second generation Engine Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

2009 BMW Z4 generations

First generation LCI

BMW Z4 Second generation model years

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