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Modification Details

Torque settings for fortwo, forfour and roadster

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Various

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Old Style 600cc For2
Old Style 700cc For2
Roadster

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Torque settings for fortwo, forfour and roadster
Acknowledgements to BBE - Binman - The AIM - Blackdog

ForTwo Engine

ForTwo Chassis

ForTwo/
Roadster Transmission

Cylinder head at crankcase (new bolts only):
Petrol M160 EU2 & EU3	21.0Nm + 3x90degree + 10degree
Petrol M160/1 EU4	21.0Nm +2x90degree + 10 degree
Diesel OM660 EU3	30.0Nm + 3x90degree + 10degree

Cylinder head cover at cylinder head:
Petrol M160 EU2 & EU3	(New only) 12.0Nm
Petrol M160/1 EU4	(New) 12.0Nm, (Used) 9.5Nm
Diesel OM660 EU3	(New only) 12.0Nm

Oil pan at crankcase:
Petrol M160 EU2 & EU3	(New only) 12.0Nm
Petrol M160/1 EU4	(New) 12.0Nm, (Used) 8.4Nm
Diesel OM660 EU3	(New only) 12.0Nm

Water Pump at major assembly carrier (new only):
Petrol M160 EU2 & EU3	9.5Nm
Petrol M160/1 EU4	14.0Nm
Diesel OM660 EU3	9.5Nm

Oil intake tube at crankcase:
Petrol M160 EU2 & EU3	(New only) 14.0Nm
Petrol M160/1 EU4	(New) 14.0Nm, (Used) 9.5Nm
Diesel OM660 EU3	(New only) 14.0Nm

Exhaust to turbo manifold:
Petrol M160 EU2 & EU3	(New only) 30.0Nm
Petrol M160/1 EU4	(New only) 30.0Nm
Diesel OM660 EU3	(New only) 30.0Nm

Exhaust Manifold at cylinder head (new & used):
Petrol M160 EU2 & EU3	16.0Nm
Petrol M160/1 EU4	16.0Nm
Diesel OM660 EU3	23.0Nm

Water Drain Plug:
All Engines	12.0Nm

Glow Plug:
Diesel OM660 EU3	(new & used) 15.0Nm

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Smart ForTwo Chassis (all engines)

ForTwo road wheels	110Nm
Tie rod end at pivot bearing	46Nm +/-4.6Nm
Brake caliper at pivot bearing	(new & used) 115Nm +/-5Nm
Wheel bearing bolts at pivot bearing	120Nm +/-12Nm
Front axle shock absorber at support bearing (transverse leaf spring)	60Nm +/-6Nm
Front axle shock absorber at pivot bearing (transverse leaf spring)	46Nm +/-6Nm
Front axle suspension strut at rebound buffer (MacPherson strut)	45Nm +/-4.5Nm
Front axle suspension strut at pivot bearing (MacPherson strut)	46Nm +/-4.6Nm
Supporting joint pivot bearing at wishbone control arm	40Nm +/-4Nm
Supporting joint tie rod at conical joint	40Nm +/- 4Nm
Front axle wishbone control arm at front sub frame	120Nm +/-12Nm
Drop link to wishbone nut	46Nm
Sway bar bush housing	85Nm
Steering gear at front sub frame	46Nm +/-4.6Nm
Front sub frame to body	85Nm +/-10Nm
Rear central wheel bearing bolts at side shaft	30Nm
Rear axle shock absorber at frame-type integral support bearing bracket	65Nm +/-6.5Nm
Rear axle shock absorber at axle tube	65Nm +/-6.5Nm
X-frame bar end to axle tube	100Nm

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Smart ForTwo and Roadster Transmission

Filler plug, transmission oil	43.0Nm
Drain plug, transmission oil	43.0Nm
Transmission at engine	23.0Nm
Engine mount at transmission	28.0Nm
Engine mount at frame-type integral support	58.0Nm
Starter at transmission housing	23.0Nm
Clutch release at transmission	10.0Nm
Modular clutch at flexible plate	20.0Nm +90degree +/- 5degree

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Smart Roadster Engine

Cylinder head at crankcase (new bolts only):
Petrol M160/1 EU4	21.0Nm +2x90degree + 10 degree

Cylinder head cover at cylinder head:
Petrol M160/1 EU4	(New) 12.0Nm, (Used) 12.0Nm

Oil pan at crankcase:
Petrol M160/1 EU4	(New) 12.0Nm, (Used) 8.4Nm

Water Pump at major assembly carrier (new only):
Petrol M160/1 EU4	14.0Nm

Oil intake tube at crankcase (new only):
Petrol M160/1 EU4	14.0Nm

Exhaust Manifold at cylinder head (new & used):
Petrol M160/1 EU4	6.0Nm

Water Drain Plug:
All engines	12.0Nm

Spark Plug (new & used):
Petrol M160/1 EU4	(New) 27.5 Nm, (Used) 22.5 Nm

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Smart Roadster Chassis (all engines)

Roadster road wheels	120Nm
Tie rod end at pivot bearing	46Nm +/-4.6Nm
Brake caliper at pivot bearing	(new & used) 115Nm +/-5Nm
Wheel bearing bolts at pivot bearing	120Nm +/-12Nm
Front axle suspension strut at rebound buffer (MacPherson light)	45Nm +/-4.5Nm
Front axle suspension strut at pivot bearing (MacPherson light)	46Nm +/-4.6Nm
Supporting joint pivot bearing at wishbone control arm	40Nm +/-4Nm
Supporting joint tie rod at conical joint	40Nm +/- 4Nm
Front axle wishbone control arm at front sub frame	120Nm +/-12Nm
Drop link to wishbone nut	46Nm
Sway bar bush housing	85Nm
Steering gear at front sub frame	46Nm +/-4.6Nm
Front sub frame to body	85Nm +/-10Nm
Rear central wheel bearing bolts at side shaft	30Nm
Rear axle shock absorber at frame-type integral support bearing bracket	65Nm +/-6.5Nm
Rear axle shock absorber at axle tube	65Nm +/-6.5Nm

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Smart ForFour Petrol M135 Engine

Cylinder head	24.5Nm +2x90degree
Cylinder head cover	8.0Nm
Oil pan	7.5Nm
Oil filter	14.0Nm
Oil filter connection	27.0Nm
Oil intake bell	8.5Nm
Water pump	8.5Nm
Timing case cover M6	8.5Nm
Timing case cover M10	39.0Nm
Intake manifold/bracket for intake manifold in engine block	18.5Nm
Exhaust manifold	34.0Nm
Spark plugs	25.0Nm

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Smart ForFour Transmission

Filler plug, transmission oil	43.0Nm
Drain plug, transmission oil	43.0Nm
Transmission at engine	25.0Nm
Engine mount at transmission	40.0Nm
Starter at transmission housing	20.0Nm
Clutch release at transmission	20.0Nm
Pressure plate at flywheel	19.0Nm
Clutch actuator	12.0Nm

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Odds & sods

Camshaft	10Nm
Inlet manifold to head	10Nm
Front hub	120Nm
Rear hub	30Nm + 90 degrees
Track rod end	40Nm
ForTwo road wheels	110Nm
Roadster road wheels	120Nm
Oil filter housing	12Nm
Sump drain plug	30Nm
Spark plug EU2 & EU3 M160 engine	(New) 27.5 Nm, (Used) 20.0 Nm
Spark plug EU4	(New) 27.5 Nm, (Used) 22.5 Nm
Exhaust to manifold nut	30Nm
Exhaust bolts on upper & lower of exhaust bracket	25Nm
Exhaust bracket rear bolt onto transmission box	23Nm

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