Exhaust System - Tightening Torques -- e90

Exhaust System - Tightening Torques -- e90 BMW M3 E90

18 00 Exhaust Assembly

		Type	Thread	Tightening specification	Measure
1AZ	Primary catalytic converter to turbocharger/or jacket pipe to catalytic converter	M57/M57TU	M10		42 Nm
		M67			15 Nm
		M30/M70		Tighten down compression spring with nut uniformly to full extent, then slacken by 1.5 turns	10 Nm
		M51		Preload compression springs with nut to 27±1 mm
		S50	M10	30 Nm
		S54/ECE	M10		27 Nm
		S54/US	M10		24 Nm
2AZ	Exhaust pipe to flow section	E23			25 Nm
3AZ	Clamp for final muffler	All	M8		15 Nm
4AZ	Catalytic converter on silencer	E36/M42/M43/M44		Version with compression spring: Evenly preload compression springs with nuts to 30 mm
5AZ	Connection of positive and negative leads to E catalytic converter	M73			5 Nm
6AZ	Rear muffler to intermediate muffler	E53	M8		30 Nm
7AZ	Vacuum tank to retaining plate	E46/M54	M8		10 Nm
8AZ	Exhaust system to exhaust manifold	M40/M42/M43/M44	M10		45 Nm
9AZ	Primary cat. to exhaust system	M57TU/E65			55 Nm

TIGHTENING TORQUE SPECIFICATION - EXHAUST ASSEMBLY

		Type	Thread	Measure
1AZ	Exhaust manifold to cylinder head	S65	M8	25 Nm
2AZ	Exhaust manifold to exhaust system	S65	M10	27 Nm
3AZ	Exhaust system to bracket on transmission	S65	M8	21 Nm
4AZ	Exhaust system to rear differential	S65	M12	35 Nm
5AZ	Rear muffler to body	S65	M8	21 Nm
6AZ	Rear muffler to intermediate muffler	S65	Clamp M8	35 Nm

TIGHTENING TORQUE SPECIFICATION - EXHAUST MANIFOLD, EXHAUST SYSTEM

		Type	Thread	Tightening specification	Measure
1AZ	Cover, air intake muffler	S65			3 Nm

TIGHTENING TORQUE SPECIFICATION - FIXTURES (S65)

		Type	Thread	Tightening specification	Measure
1AZ	Pressure sensor to idle air strip	S65	D5x12		3 Nm

TIGHTENING TORQUE SPECIFICATION - PRESSURE SENSORS (S65)

		Type	Thread	Tightening specification	Measure
1AZ	Chrome panel to rear silencer	E8x, E9x		Powerlok screw locking	9.5 Nm

TIGHTENING TORQUE SPECIFICATION - REAR SILENCER

		Type	Thread	Tightening specification	Measure
1AZ	Coolant temperature sensor	S65	M12x1.5		14 Nm
2AZ	Oil pressure switch	S65	M12x1.5		27 Nm
3AZ	Oil condition sensor	S65	M6	1. Initial tightening	2 Nm
3AZ	Oil condition sensor			2. Final tightening	9 Nm
4AZ	Spacer, el. throttle valve actuator to crankcase	S65	M6	Microencapsulation	8 Nm
5AZ	Camshaft sensor to cylinder head cover	S65	M6x16 AL	1. Jointing torque	4 Nm
5AZ	Camshaft sensor to cylinder head cover	S65	M6x16 AL	2. Angle of rotation	45°

TIGHTENING TORQUE SPECIFICATION - SENSORS (S65)

		Type	Thread	Tightening specification	Measure
1AZ	Actuating lever to actuating shaft	S65	M5 10.9	Use screws and nuts only once	7 Nm

TIGHTENING TORQUE SPECIFICATION - THROTTLE VALVE ACTUATION (S65)