2012 BMW 1 Series M1 3-door Hatchback engine fastener tightening specifications

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Condition	Value

expand_moreAir intake system

expand_moreIntake manifold


M7	11.06 lbf⋅ft11.06 lbf⋅ft15 N⋅m

expand_moreAuxiliary assemblies


Auxiliary drive belt deflection pulley	41.3 lbf⋅ft41.3 lbf⋅ft56 N⋅m
Auxiliary drive belt tensioner	28.03 lbf⋅ft28.03 lbf⋅ft38 N⋅m
Air-conditioning compressor	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m
Air-conditioning compressor pressure line	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreAlternator


M8	14.01 lbf⋅ft14.01 lbf⋅ft19 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

expand_moreCarburetion


Fuel-distributing pipe	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m

expand_moreHigh-pressure line


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

expand_moreHigh-pressure pump


Manufacturer Bosch	8.85 lbf⋅ft8.85 lbf⋅ft12 N⋅m
Manufacturer Continental	6.64 lbf⋅ft6.64 lbf⋅ft9 N⋅m

expand_moreInjection hoses


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


Injection nozzle (injector)	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m

expand_moreCharging

expand_moreTurbo charger

expand_moreAt the cylinder head

Figure 1. Charging, Turbo charger, At the cylinder head.


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Replace nuts. See figure 1.
Second stage	9.59 lbf⋅ft9.59 lbf⋅ft13 N⋅m


Turbocharger bracket	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Turbocharger oil feed line	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Turbocharger oil return line	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m

expand_moreCooling system

expand_moreCoolant pump

expand_moreM8 × 26 screws


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

expand_moreCylinder head

expand_moreCamshaft bearing


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

expand_moreOutlet camshaft

Figure 2. Cylinder head, Camshaft bearing, Outlet camshaft.


First stage	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m
Note correct order of tensioning. See figure 2.
Second stage	60°60°60°

expand_moreCylinder head screws

expand_moreScrews 1 – 10

Figure 3. Cylinder head, Cylinder head screws, Screws 1 – 10.


First stage	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m
Replace screws. See figure 3.
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


Valve cover	6.27 lbf⋅ft6.27 lbf⋅ft8.5 N⋅m
Note correct order of tensioning.

expand_moreEngine block

expand_moreConnecting rod bearing

expand_moreM9


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace, wash and lightly lubricate the screws.
Second stage	70°70°70°
Third stage	70°70°70°

expand_moreCrankshaft central screws

expand_moreCentral screws


First stage	73.76 lbf⋅ft73.76 lbf⋅ft100 N⋅m
Replace and lightly oil the screw.
Second stage	270°270°270°

expand_moreDrive plate


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

expand_moreFlywheel


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

expand_moreMain bearing

expand_moreScrews 1 – 14 (M10 × 100)

Figure 4. Engine block, Main bearing, Screws 1 – 14 (M10 × 100).


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Replace screws. See figure 4.
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_moreVibration damper


M8	25.81 lbf⋅ft25.81 lbf⋅ft35 N⋅m

expand_moreEngine control

expand_moreCamshaft timing chain guide rail

expand_moreM18


Cap	18.44 lbf⋅ft18.44 lbf⋅ft25 N⋅m


M7	10.33 lbf⋅ft10.33 lbf⋅ft14 N⋅m

expand_moreCamshaft timing chain slip rail

expand_moreAt the cylinder head


M6	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m


Camshaft timing chain tensioner	40.57 lbf⋅ft40.57 lbf⋅ft55 N⋅m
Replace sealing rings.

expand_moreCamshaft timing chain tensioning rail

expand_moreM22


Cap	36.88 lbf⋅ft36.88 lbf⋅ft50 N⋅m


M8	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m


Eccentric shaft for intake valve timing	7.38 lbf⋅ft7.38 lbf⋅ft10 N⋅m

expand_moreInlet camshaft wheel

expand_moreCentral screws


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Use new screw.
Second stage	180°180°180°


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

expand_moreOutlet camshaft wheel

expand_moreCentral screws


First stage	14.75 lbf⋅ft14.75 lbf⋅ft20 N⋅m
Use new screw.
Second stage	180°180°180°

expand_moreTensioning chain of oil pump drive chain

expand_moreM16


Cap	19.91 lbf⋅ft19.91 lbf⋅ft27 N⋅m

expand_moreM6


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

expand_moreEngine lubrication


Oil cooler	11.8 lbf⋅ft11.8 lbf⋅ft16 N⋅m

expand_moreOil drain plug


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

expand_moreOil filter housing


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_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
Replace screws.
Second stage	90°90°90°

expand_moreM8 × 37 screws


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

expand_moreOil pump chain wheel

expand_moreM8


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

expand_moreOil sump

expand_moreAt the gearbox


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

expand_moreM 135 i with gasoline straight-6 3.0 L 315 HP engine (2011.12–)

expand_moreM8 × 112 screws


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

expand_moreM8 × 26 screws


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

expand_moreM8 × 92 screws


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

expand_moreM 135 i xDrive with gasoline straight-6 3.0 L 315 HP engine (2012.2–)

expand_moreM8 × 36 screws


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

expand_moreEngine management

expand_moreCamshaft sensor


M6	5.9 lbf⋅ft5.9 lbf⋅ft8 N⋅m


Charge air pressure sensor	2.95 lbf⋅ft2.95 lbf⋅ft4 N⋅m
Crankshaft sensor	3.69 lbf⋅ft3.69 lbf⋅ft5 N⋅m

expand_moreKnock sensor


M8	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	48.68 lbf⋅ft48.68 lbf⋅ft66 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_moreSubframe


M12	88.51 lbf⋅ft88.51 lbf⋅ft120 N⋅m
M14	88.51 lbf⋅ft88.51 lbf⋅ft120 N⋅m

expand_moreSubframe stiffening plate


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

expand_moreExhaust system

expand_moreCatalytic converter

expand_moreAt the turbocharger


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


Catalytic converter bracket	20.65 lbf⋅ft20.65 lbf⋅ft28 N⋅m

expand_moreExhaust manifold

expand_moreAt the cylinder head

Figure 5. Exhaust system, Exhaust manifold, At the cylinder head.


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_moreExhaust pipe


Clamps	22.13 lbf⋅ft22.13 lbf⋅ft30 N⋅m


Exhaust pipe bracket	14.01 lbf⋅ft14.01 lbf⋅ft19 N⋅m
Replace screws.

expand_moreIgnition system

expand_moreSpark plugs


M12 × 1,25 screws	14.75–19.18 lbf⋅ft14.75–19.18 lbf⋅ft20–26 N⋅m
M14 × 1,25 screws	19.91–24.34 lbf⋅ft19.91–24.34 lbf⋅ft27–33 N⋅m

expand_moreStart system

expand_moreStarter


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 2012 BMW 1 Series M1 3-door Hatchback 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 1 Series M1 3-door Hatchback 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 2012 BMW 1 Series M1 3-door Hatchback you're not only saving money, but also also improving your technical skills and learning something new.

2012 BMW 1 Series M1 3-door Hatchback Second generation Engine Fastener Tightening Specifications

Table of Contents

Conquer your fears and never give up!

BMW 1 Series M1 3-door Hatchback Second generation model years

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