2018 BMW 4 Series Gran Coupe engine fastener tightening specifications

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Condition	Value

expand_moreAir intake system

expand_moreIntake manifold


All BMW gasoline straight-6 3.0 L N55 B30 A engines	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m

expand_moreAll BMW diesel straight-6 3.0 L N57 D30 A engines

Figure 1. Air intake system, Intake manifold, BMW diesel straight-6 3.0 L N57 D30 A.


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
See figure 1.
Figure 2. Air intake system, Intake manifold, BMW diesel straight-6 3.0 L N57 D30 A.
Second stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
See figure 2.

expand_moreAll other modifications


M7	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m

expand_moreAuxiliary assemblies

expand_moreAuxiliary drive belt deflection pulley

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


M10	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m


BMW gasoline straight-6 3.0 L N55 B30 A 302 HP	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m
BMW gasoline straight-6 3.0 L N55 B30 A 335 HP	44.25 lbf⋅ft44.25 lbf⋅ft60 N⋅m

expand_moreAll other modifications


M8	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreAuxiliary drive belt tensioner


All BMW gasoline straight-6 3.0 L N55 B30 A engines	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m

expand_moreAll BMW diesel straight-6 3.0 L N57 D30 B engines


M10	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m


All other modifications	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreAuxiliary drive belt tensioner

expand_moreAll BMW diesel straight-6 3.0 L N57 D30 B engines


M10	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m


All other modifications	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m

expand_moreAir-conditioning compressor


BMW gasoline straight-6 3.0 L N55 B30 A 302 HP	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m
BMW gasoline straight-6 3.0 L N55 B30 A 335 HP	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m
All other modifications	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m

expand_moreAir-conditioning compressor bracket


BMW gasoline straight-6 3.0 L N55 B30 A 302 HP	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m
BMW gasoline straight-6 3.0 L N55 B30 A 335 HP	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreAll other modifications


M8	13.28 lbf⋅ft13.28 lbf⋅ft18 N⋅m

expand_moreAir-conditioning compressor pressure line


M6	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreAlternator


BMW gasoline straight-6 3.0 L N55 B30 A 302 HP	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m
BMW diesel straight-6 3.0 L N57 D30 B 308 HP	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m
BMW gasoline straight-6 3.0 L N55 B30 A 335 HP	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreAll other modifications


M10	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m

expand_moreGenerator bracket


M8	13.28 lbf⋅ft13.28 lbf⋅ft18 N⋅m


Vacuum pump	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Replace screws.
Vacuum pump sprocket wheel	48.68 lbf⋅ft48.68 lbf⋅ft66 N⋅m
Clean and lubricate the screws.

expand_moreCarburetion

expand_moreExhaust gas return cooler

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


At the cylinder head	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreAll other modifications


First stage	2.95 lbf⋅ft2.95 lbf⋅ft4 N⋅m
Second stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreExhaust recirculation pipe

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


In the intake manifold	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
On exhaust manifold	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreAll other modifications


On exhaust manifold	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreOn intake manifold


First stage	2.95 lbf⋅ft2.95 lbf⋅ft4 N⋅m
Second stage	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreFuel-distributing pipe


BMW gasoline straight-4 2.0 L N20 B20 B 161 HP	5.16 lbf⋅ft5.16 lbf⋅ft7 N⋅m
BMW gasoline straight-4 2.0 L N20 B20 A 161 HP	5.16 lbf⋅ft5.16 lbf⋅ft7 N⋅m
BMW gasoline straight-4 2.0 L N20 B20 B 181 HP	5.16 lbf⋅ft5.16 lbf⋅ft7 N⋅m
BMW gasoline straight-4 2.0 L N26 B20 A 241 HP	5.16 lbf⋅ft5.16 lbf⋅ft7 N⋅m
BMW gasoline straight-4 2.0 L N20 B20 A 241 HP	5.16 lbf⋅ft5.16 lbf⋅ft7 N⋅m
All other modifications	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreHigh-pressure line

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP


On high-pressure pump	19.91–24.34 lbf⋅ft19.91–24.34 lbf⋅ft27–33 N⋅m
On rail	19.91–24.34 lbf⋅ft19.91–24.34 lbf⋅ft27–33 N⋅m

expand_moreBMW gasoline straight-4 2.0 L N20 B20 A 241 HP


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

expand_moreAll other modifications


Union nuts	17.7 lbf⋅ft17.7 lbf⋅ft24 N⋅m

expand_moreHigh-pressure pump

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP


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

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 HP


Manufacturer Bosch	8.11–9.59 lbf⋅ft8.11–9.59 lbf⋅ft11–13 N⋅m

expand_moreAll other modifications


M8	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreHigh-pressure pump pulley


Cap	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace the cover plate.

expand_moreM12


Central screws	47.94 lbf⋅ft47.94 lbf⋅ft65 N⋅m

expand_moreInjection nozzle (injector)


BMW gasoline straight-4 2.0 L N20 B20 B 161 HP	8.11–11.06 lbf⋅ft8.11–11.06 lbf⋅ft11–15 N⋅m
BMW gasoline straight-4 2.0 L N20 B20 A 161 HP	8.11–11.06 lbf⋅ft8.11–11.06 lbf⋅ft11–15 N⋅m
BMW gasoline straight-4 2.0 L N20 B20 B 181 HP	8.11–11.06 lbf⋅ft8.11–11.06 lbf⋅ft11–15 N⋅m
BMW gasoline straight-4 2.0 L N20 B20 A 241 HP	8.11–11.06 lbf⋅ft8.11–11.06 lbf⋅ft11–15 N⋅m
BMW gasoline straight-4 2.0 L N26 B20 A 241 HP	8.11–11.06 lbf⋅ft8.11–11.06 lbf⋅ft11–15 N⋅m

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace copper sealing rings.
Second stage	19.18 lbf⋅ft19.18 lbf⋅ft26 N⋅m

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 HP


Retaining clamp	8.85–10.33 lbf⋅ft8.85–10.33 lbf⋅ft12–14 N⋅m

expand_moreAll other modifications


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Second stage	19.18 lbf⋅ft19.18 lbf⋅ft26 N⋅m

expand_moreCharging

expand_moreTurbo charger

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


Clamps	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m

expand_moreBMW diesel straight-6 3.0 L N57 D30 B 308 HP


M10 × 25 screws	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
M8 × 20 screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreAll other modifications


M8 × 20 screws	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Use Molykote grease.


Turbocharger bracket	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreTurbocharger oil feed line


On the engine block	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m

expand_moreTurbocharger oil return line


On the engine block	2.21 lbf⋅ft2.21 lbf⋅ft3 N⋅m

expand_moreCooling system

expand_moreCoolant drain plug


On the engine block	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreCoolant pump

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP

expand_moreOnto crankcase


M8	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m


BMW diesel straight-6 3.0 L N57 D30 A 255 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace sealing rings.
BMW diesel straight-6 3.0 L N57 D30 A 282 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace sealing rings.

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 HP


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


BMW diesel straight-6 3.0 L N57 D30 B 308 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace sealing rings.

expand_moreAll other modifications


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m


Fan wheel	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Viscous fan clutch	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Left-hand thread

expand_moreCylinder head

expand_moreCamshaft bearing

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP

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_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


Bearing cap	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Tighten crosswise from inside to outside.

expand_moreBearing casing

Figure 3. Cylinder head, Camshaft bearing, BMW diesel straight-6 3.0 L N57 D30 A 255 HP, Bearing casing.


Screws 1 – 20	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m
Note correct order of tensioning. See figure 3.

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 HP


Inlet camshaft	6.27 lbf⋅ft6.27 lbf⋅ft8.5 N⋅m

expand_moreOutlet camshaft

Figure 4. Cylinder head, Camshaft bearing, BMW gasoline straight-6 3.0 L N55 B30 A 302 HP, Outlet camshaft.


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Note correct order of tensioning. See figure 4.
Second stage	60°60°60°

expand_moreBMW diesel straight-6 3.0 L N57 D30 B 308 HP


Bearing cap	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
helically from the inside out

expand_moreBearing casing

Figure 5. Cylinder head, Camshaft bearing, BMW diesel straight-6 3.0 L N57 D30 B 308 HP, Bearing casing.


Screws 1 – 20	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m
See figure 5.

expand_moreAll other modifications


Bearing cap	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
Figure 6. Cylinder head, Camshaft bearing, All other modifications.
Bearing casing	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m
See figure 6.

expand_moreCylinder head screws

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP

expand_moreScrews 1 – 6

Figure 7. Cylinder head, Cylinder head screws, BMW gasoline straight-4 2.0 L N20 B20 B 161 HP, Screws 1 – 6.


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace screws. See figure 7.
Third stage	90°90°90°
Fifth stage	180°180°180°

expand_moreScrew 11


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

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_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP

expand_moreScrews 1 – 14

Figure 8. Cylinder head, Cylinder head screws, BMW diesel straight-6 3.0 L N57 D30 A 255 HP, Screws 1 – 14.


First stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Replace screws. See figure 8.
Second stage	120°120°120°
Third stage	120°120°120°

expand_moreScrew 15


Fourth stage	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 HP

expand_moreScrews 1 – 10

Figure 9. Cylinder head, Cylinder head screws, BMW gasoline straight-6 3.0 L N55 B30 A 302 HP, Screws 1 – 10.


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace screws. See figure 9.
Third stage	90°90°90°
Fifth stage	180°180°180°

expand_moreScrews 11 – 14


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

expand_moreScrews 15 – 18


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

expand_moreAll other modifications

expand_moreScrews 1 – 10

Figure 10. Cylinder head, Cylinder head screws, All other modifications, Screws 1 – 10.


First stage	51.63 lbf⋅ft51.63 lbf⋅ft70 N⋅m
Replace screws. See figure 10.
Second stage	180° detach
loosen in reverse order to the illustration
Third stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Fourth stage	120°120°120°
Fifth stage	120°120°120°

expand_moreScrew 11


Sixth stage	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreValve cover

expand_moreBMW diesel straight-4 2.0 L N47 D20 C 134 HP


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m


BMW gasoline straight-6 3.0 L N55 B30 A 302 HP	6.27 lbf⋅ft6.27 lbf⋅ft8.5 N⋅m
Note correct order of tensioning. See figure 11.

BMW gasoline straight-6 3.0 L N55 B30 A 335 HP	6.27 lbf⋅ft6.27 lbf⋅ft8.5 N⋅m
Note correct order of tensioning. See figure 11.
All other modifications	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m


Valve cover locking screws	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreEngine block

expand_moreBalance shaft gear wheel

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP

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_moreAll other modifications

expand_moreM10 × 1,5 screws


First stage	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Second stage	90°90°90°

expand_moreM12 × 1,5 screws


Intermediate wheel	51.63 lbf⋅ft51.63 lbf⋅ft70 N⋅m
Replace nuts.

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-4 2.0 L N20 B20 B 161 HP


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

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 HP


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws.
Second stage	140°140°140°

expand_moreAll other modifications

expand_moreM9


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screw, wash and slightly oil.
Second stage	70°70°70°

expand_moreCrankshaft central screws

expand_moreM18


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

expand_moreDrive plate

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP


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


All other modifications	88.51 lbf⋅ft88.51 lbf⋅ft120 N⋅m
Replace bolts.

expand_moreFlywheel

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP


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


All other modifications	88.51 lbf⋅ft88.51 lbf⋅ft120 N⋅m
Replace bolts.

expand_moreMain bearing

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP

expand_moreScrews 1 – 10

Figure 12. Engine block, Main bearing, BMW gasoline straight-4 2.0 L N20 B20 B 161 HP, Screws 1 – 10.


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws. See figure 12.
Second stage	90°90°90°

expand_moreScrews 11 – 30


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

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


First stage	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace screws.
Second stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Third stage	60°60°60°
Fourth stage	60°60°60°

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 HP

expand_moreScrews 1 – 14 (M10 × 100)

Figure 13. Engine block, Main bearing, BMW gasoline straight-6 3.0 L N55 B30 A 302 HP, Screws 1 – 14 (M10 × 100).


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws. See figure 13.
Second stage	70°70°70°

expand_moreM10 × 27 screw 15


Third stage	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Replace screws.
Fourth stage	90°90°90°

expand_moreM10 × 41 screw 15


Third stage	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Replace screws.
Fourth stage	90°90°90°

expand_moreScrew 15 (M8 × 37)


Third stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace screws.
Fourth stage	90°90°90°

expand_moreBMW diesel straight-6 3.0 L N57 D30 B 308 HP

expand_moreM10 × 85 screws


First stage	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace screws.
Second stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Third stage	60°60°60°
Fourth stage	60°60°60°

expand_moreAll other modifications


First stage	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Replace bolts.
Second stage	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Third stage	60°60°60°
Fourth stage	60°60°60°

expand_moreVibration damper

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP


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

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 HP


M8	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m

expand_moreAll other modifications

expand_moreM10 × 65 screws


First stage	29.5 lbf⋅ft29.5 lbf⋅ft40 N⋅m
Replace bolts.
Second stage	120°120°120°

expand_moreEngine control

expand_moreCamshaft timing chain guide rail

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP

expand_moreAt the cylinder head


M7	10.33 lbf⋅ft10.33 lbf⋅ft14 N⋅m

expand_moreM18


Cap	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m

expand_moreM22


Cap	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Replace the cover plate.

expand_moreOn the engine block


M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 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_moreAll other modifications


M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreCamshaft timing chain slip rail

expand_moreAll BMW gasoline straight-6 3.0 L N55 B30 A engines


At the cylinder head	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreAll other modifications

expand_moreAt the cylinder head


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreCamshaft timing chain tensioner


BMW gasoline straight-4 2.0 L N20 B20 B 161 HP	59 lbf⋅ft59 lbf⋅ft80 N⋅m
Replace sealing rings.
BMW gasoline straight-4 2.0 L N20 B20 A 161 HP	59 lbf⋅ft59 lbf⋅ft80 N⋅m
Replace sealing rings.
BMW gasoline straight-4 2.0 L N20 B20 B 181 HP	59 lbf⋅ft59 lbf⋅ft80 N⋅m
Replace sealing rings.
BMW gasoline straight-4 2.0 L N26 B20 A 241 HP	59 lbf⋅ft59 lbf⋅ft80 N⋅m
BMW gasoline straight-4 2.0 L N20 B20 A 241 HP	59 lbf⋅ft59 lbf⋅ft80 N⋅m
BMW gasoline straight-6 3.0 L N55 B30 A 302 HP	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
Replace sealing rings.
BMW gasoline straight-6 3.0 L N55 B30 A 335 HP	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
Replace sealing rings.

expand_moreAll other modifications


M22 × 1,5 screws	51.63 lbf⋅ft51.63 lbf⋅ft70 N⋅m

expand_moreCamshaft timing chain tensioning rail

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP

expand_moreM22


Cap	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m
Replace the cover plate.

expand_moreOn the engine block


M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 HP

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
Replace the cover plate.


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

expand_moreCamshaft timing gear


M7	10.33 lbf⋅ft10.33 lbf⋅ft14 N⋅m

expand_moreChain tensioner


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

expand_moreControl drive chain guide rail


M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreControl drive chain tensioner


M6	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m


Control drive chain tensioning rail	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Control drive timing chain slip rail	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreEccentric shaft for intake valve timing


M6	6.27 lbf⋅ft6.27 lbf⋅ft8.5 N⋅m

expand_moreInlet camshaft wheel

expand_moreAll BMW gasoline straight-6 3.0 L N55 B30 A engines

expand_moreCentral screws


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Use new screw.
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°


Intermediate shaft chain sprocket	51.63 lbf⋅ft51.63 lbf⋅ft70 N⋅m
Replace nuts.

expand_moreOil pump camshaft timing chain guide rail

expand_moreM16 × 1,5 screws


Cap	19.91 lbf⋅ft19.91 lbf⋅ft27 N⋅m
Replace the cover plate.

expand_moreM6 × 16 screws


First stage	2.95 lbf⋅ft2.95 lbf⋅ft4 N⋅m
Replace screws.
Second stage	45°45°45°


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

expand_moreOutlet camshaft wheel

expand_moreAll BMW gasoline straight-6 3.0 L N55 B30 A engines

expand_moreCentral screws


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Use new screw.
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

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP

expand_moreOn the engine block


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

expand_moreOn timing case cover


Cap	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace the cover plate.

expand_moreAll other modifications


Cap	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace the cover plate.

expand_moreScrews (M6)


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

expand_moreEngine lubrication

expand_moreOil cooler


BMW diesel straight-6 3.0 L N57 D30 A 255 HP	5.16 lbf⋅ft5.16 lbf⋅ft7 N⋅m
BMW diesel straight-6 3.0 L N57 D30 A 282 HP	5.16 lbf⋅ft5.16 lbf⋅ft7 N⋅m
BMW gasoline straight-6 3.0 L N55 B30 A 302 HP	11.8 lbf⋅ft11.8 lbf⋅ft16 N⋅m
BMW diesel straight-6 3.0 L N57 D30 B 308 HP	5.16 lbf⋅ft5.16 lbf⋅ft7 N⋅m
BMW gasoline straight-6 3.0 L N55 B30 A 335 HP	11.8 lbf⋅ft11.8 lbf⋅ft16 N⋅m
All other modifications	4.43 lbf⋅ft4.43 lbf⋅ft6 N⋅m

expand_moreOil drain plug

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP


M12	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace plastic screw.


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

expand_moreOil filter


Oil filter cover	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m
Slightly oil sealing lips.

expand_moreOil filter housing

expand_moreBMW diesel straight-4 2.0 L N47 D20 C 134 HP


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

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


On the engine block	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreAll other modifications


At the cylinder head	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m


Oil pressure sensor	19.91 lbf⋅ft19.91 lbf⋅ft27 N⋅m

expand_moreOil pump

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP

Figure 14. Engine lubrication, Oil pump, BMW gasoline straight-4 2.0 L N20 B20 B 161 HP.


M6 × 70 screws	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m
See figure 14.

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


On the engine block	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m
Replace screws.

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 HP

expand_moreScrews (M8 × 123)


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

expand_moreScrews (M8 × 31)


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

expand_moreScrews (M8 × 37)


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

expand_moreAll other modifications


M8 × 30 screws	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace bolts.

expand_moreM8 × 35 screws


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Replace bolts.
Second stage	90°90°90°

expand_moreOil pump chain wheel

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP

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_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Left-hand thread
Second stage	50°50°50°

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 HP


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

expand_moreAll other modifications

expand_moreM8


First stage	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m
Use new screw. (left-hand thread)
Second stage	90°90°90°

expand_moreOil sump

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP

expand_morePlastic oil sump


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

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


On the engine block	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 HP

expand_moreM8 × 36 screws


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


M8 × 50 screws	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m
Replace screws.

expand_moreAll other modifications


M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreEngine management

expand_moreCamshaft sensor


BMW gasoline straight-4 2.0 L N20 B20 A 161 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
BMW gasoline straight-4 2.0 L N20 B20 B 161 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
BMW gasoline straight-4 2.0 L N20 B20 B 181 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
BMW gasoline straight-4 2.0 L N26 B20 A 241 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
BMW gasoline straight-4 2.0 L N20 B20 A 241 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
BMW gasoline straight-6 3.0 L N55 B30 A 302 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
BMW gasoline straight-6 3.0 L N55 B30 A 335 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
All other modifications	2.95 lbf⋅ft2.95 lbf⋅ft4 N⋅m

expand_moreCrankshaft sensor


BMW gasoline straight-4 2.0 L N20 B20 A 161 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
BMW gasoline straight-4 2.0 L N20 B20 B 161 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
BMW gasoline straight-4 2.0 L N20 B20 B 181 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
BMW gasoline straight-4 2.0 L N20 B20 A 241 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
BMW gasoline straight-4 2.0 L N26 B20 A 241 HP	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
All other modifications	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m


Exhaust gas temperature sensor	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Glow plugs	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m
Knock sensor	16.23 lbf⋅ft16.23 lbf⋅ft22 N⋅m
Lambda sensor	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m

expand_moreEngine mounting

expand_moreEngine bracket


On the engine block	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m

expand_moreEngine mounting


At the subframe	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m
On engine bracket	41.3 lbf⋅ft41.3 lbf⋅ft56 N⋅m

expand_moreEngine suspension

expand_moreOn the engine block


M10 screws (class 8.8)	48.68 lbf⋅ft48.68 lbf⋅ft66 N⋅m


Subframe	88.51 lbf⋅ft88.51 lbf⋅ft120 N⋅m

expand_moreSubframe diagonal strut

expand_moreM12


First stage	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m
Use new screws.
Second stage	90°90°90°


M8	15.49 lbf⋅ft15.49 lbf⋅ft21 N⋅m

expand_moreSubframe stiffening plate


First stage	41.3 lbf⋅ft41.3 lbf⋅ft56 N⋅m
Second stage	60°60°60°

expand_moreExhaust system

expand_moreCatalytic converter

expand_moreM8


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

expand_moreCatalytic converter bracket

expand_moreAt the gearbox


M10	41.3 lbf⋅ft41.3 lbf⋅ft56 N⋅m


Otherwise	20.65 lbf⋅ft20.65 lbf⋅ft28 N⋅m

expand_moreDiesel particulate filter

expand_moreBMW diesel straight-4 2.0 L N47 D20 C 141 HP

expand_moreAt the turbocharger


Clamps	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m
Replace clamps.

expand_moreBMW diesel straight-6 3.0 L N57 D30 B 308 HP

expand_moreClamps


M8	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m
Use new parts.

expand_moreAll other modifications


Clamps	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m

expand_moreExhaust manifold

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP

Figure 15. Exhaust system, Exhaust manifold, BMW gasoline straight-4 2.0 L N20 B20 B 161 HP.


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace nuts. See figure 15.
Second stage	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


First stage	8.11 lbf⋅ft8.11 lbf⋅ft11 N⋅m
Tighten nuts and screws crosswise in inside-to-outside order.
Second stage	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m

expand_moreBMW gasoline straight-6 3.0 L N55 B30 A 302 HP

expand_moreAt the cylinder head

Figure 16. Exhaust system, Exhaust manifold, BMW gasoline straight-6 3.0 L N55 B30 A 302 HP, At the cylinder head.


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace nuts. See figure 16.
Second stage	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m

expand_moreOn exhaust manifold


Support	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m

expand_moreOn the engine block


Support	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws.


All other modifications	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m
Replace nuts.


Exhaust manifold heat shields	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreExhaust pipe

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP

expand_moreClamps


M8	17.7–19.18 lbf⋅ft17.7–19.18 lbf⋅ft24–26 N⋅m

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP

expand_moreAt the turbocharger


Clamps	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m
Use a new clamp

expand_moreBMW diesel straight-6 3.0 L N57 D30 B 308 HP


Clamps	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m

expand_moreAll other modifications


On catalytic converter	19.18 lbf⋅ft19.18 lbf⋅ft26 N⋅m

expand_moreExhaust pipe bracket

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP


M8	15.49 lbf⋅ft15.49 lbf⋅ft21 N⋅m

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


On chassis	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m


BMW gasoline straight-6 3.0 L N55 B30 A 302 HP	15.49 lbf⋅ft15.49 lbf⋅ft21 N⋅m

expand_moreBMW diesel straight-6 3.0 L N57 D30 B 308 HP


M8	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m


BMW gasoline straight-6 3.0 L N55 B30 A 335 HP	15.49 lbf⋅ft15.49 lbf⋅ft21 N⋅m

expand_moreAll other modifications


At the gearbox	15.49 lbf⋅ft15.49 lbf⋅ft21 N⋅m
On chassis	15.49 lbf⋅ft15.49 lbf⋅ft21 N⋅m
On rear axle	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m

expand_moreExhaust pipe rear

expand_moreBMW diesel straight-6 3.0 L N57 D30 A 255 HP


On chassis	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreAll other modifications


Clamps	33.19 lbf⋅ft33.19 lbf⋅ft45 N⋅m

expand_moreParticle filter bracket

expand_more420 d xDrive with diesel straight-4 2.0 L 161 HP engine (2014.3–)


M12	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m
M8	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreAll other modifications


At the gearbox	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

expand_moreIgnition system

expand_moreSpark plugs

expand_moreAll BMW gasoline straight-6 3.0 L N55 B30 A engines


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_moreAll other modifications


M12	16.96 lbf⋅ft16.96 lbf⋅ft23 N⋅m
M14	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m

expand_moreStart system

expand_moreStarter

expand_moreBMW gasoline straight-4 2.0 L N20 B20 B 161 HP

expand_moreOnto crankcase


M10	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m


BMW gasoline straight-6 3.0 L N55 B30 A 302 HP	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m

expand_moreAll other modifications


M8	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m

Please be noted that all capacities listed here are approximate. Check fluid levels when adding or refilling as recommended in your 2018 BMW 4 Series Gran Coupe 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

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 BMW 4 Series Gran Coupe 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 2018 BMW 4 Series Gran Coupe you're not only saving money, but also also improving your technical skills and learning something new.

2018 BMW 4 Series Gran Coupe First generation LCI Engine Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

BMW 4 Series Gran Coupe First generation LCI model years

Suggest edit