Engine - Tightening Torques — BMW M3 E46 (1999-2006)

11 11 Engine block

	Type	Thread	Tightening specification	Measure
1AZ Main bearing screws	M10/M20/M30	M10	Replace, wash and oil screws	60 Nm
	M21	M10	Replace, wash and oil screws	65 Nm
	S38/S14/M40/M42/M43/M43TU/M44/M50/M41/M51/S50/S50 US	M10	Replace, wash and oil screws
			Jointing torque	20 Nm
			Torque angle	50 °
	M47/M57	M10	Replace, wash and oil screws
			Jointing torque	20 Nm
			Torque angle	70 °
	M47TU/M57TU	M10	Replace, wash and oil screws
			Jointing torque	22 Nm
			Torque angle	90 °
	M67	M12	Replace, wash and oil screws
			Jointing torque	20 Nm
			Torque angle	200 °
	S54	M10	Replace, wash and oil screws
			Jointing torque	25 Nm
			Torque angle	50 °
2AZ Main bearing screws	M70/S70/M73	M10	Replace screws Do not wash off screw coating
			Jointing torque	20 Nm
			Torque angle	70 °
	M60/M62	M10/M11	Replace screws Do not wash off screw coating
		M10/M11	Jointing torque	20 Nm
		M10	Torque angle	70 °
		M11	Torque angle	100 °
	M54/M56/M52TU/M52/with aluminum engine block	M10	Replace, wash and oil screws
			Jointing torque	20 Nm
			Torque angle	70 °
	S52/M52/with cast iron engine block	M10	Replace, wash and oil screws
			Jointing torque	20 Nm
			Torque angle	50 °

ENGINE BLOCK TIGHTENING TORQUE SPECIFICATIONS (1AZ-2AZ)

	Type	Thread	Tightening specification	Measure
3AZ Taper screw mount on main bearing
Screws and spacer bolts	M60/M62/M70/S70/M73/S62	M8	Replace screws
			Jointing torque	20 Nm
			Torque angle	45 °
	N62/N73	M8		34 Nm
Threaded support sleeves	M70/M60/M62/S70/M73/S62			10 Nm
	N62/N73			6 Nm
4AZ Struts/bracing shell	M67	M10.9		66 Nm
	All others	M10		43 Nm
	All	M8		22 Nm
5AZ Drain plug for coolant in engine block	All	M14 x 1.5		25 Nm
6AZ Main oil gallery seal plugs	All	M16 x 1.5		34 Nm
	All	M18x1.5		40 Nm
	N62/N73	M18x1.5	Insert screw with Loctite	25 Nm
	N40/N42/N45/N46	M16x1.5		36 Nm
Main oil gallery, rear (seal plugs with control valve)	M62/S62	M18x1		10 Nm
7AZ Oil spray nozzle on engine block	All	M6		10 Nm
Oil spray nozzle screwed into bearing seat (coat thread with Loctite 243)	M73	M8x1		5 Nm
Oil spray nozzle to engine block (banjo bolt)	All others	M8x1		12 Nm
8AZ Pressure holding valve to crankcase (1bar)	S54/B32			20 Nm

ENGINE BLOCK TIGHTENING TORQUE SPECIFICATIONS (3AZ-8AZ)

11 12 Cylinder Head with Cover

	Type	Thread	Tightening specification	Measure
5AZ Cylinder head bolts	M51/M41	M11	Replace, wash and oil screws
			Jointing torque	80 Nm
			Loosen all bolts 1/2 turn
			Jointing torque	50 Nm
			Torque angle	90 °
			Torque angle	90 °
			Warm-running time	25 min
			Torque angle	90 °
6AZ Cylinder head bolts	M40/M42/M43/M43TU/M44/M50/S50 US/S52/M52/with cast iron engine block	M10	Replace, wash and oil screws
			Jointing torque	30 Nm
			Torque angle	90 °
			Torque angle	90 °
Cylinder head bolts	M54/M56/M52TU/M52/with aluminum engine block	M10	Replace, wash and oil screws
			Jointing torque	40 Nm
			Torque angle	90 °
			Torque angle	90 °
Cylinder head bolts	N40/N42/N45/N46	M8/M10	Tightening specifications for M8 and M10 screws are identical: Replace, wash and oil screws
			Jointing torque	30 Nm
			Torque angle	90 °
			Torque angle	90 °

CYLINDER HEAD WITH COVER TIGHTENING TORQUE SPECIFICATIONS (5AZ-6AZ)

	Type	Thread	Measure
11AZ Cylinder head cover	All	M6	10 Nm
	All	M7	15 Nm
	M21	M8	15 Nm
12AZ Oil trap to cylinder head cover	M21	M8	17 Nm
13AZ Timing case to cylinder head	All	M7	15 Nm
	All	M8	20 Nm
14AZ Plug for oil channel (microencapsulated)	M47/M57	M12 x 1.5	20 Nm
15AZ Vent plugs to cylinder head (coolant)	M67		2 Nm

CYLINDER HEAD WITH COVER TIGHTENING TORQUE SPECIFICATIONS (11AZ-AZ15)

11 13 Oil Pan

	Type	Thread	Tightening specification	Measure
1AZ Oil drain plug	All	M12 x 1.5		25 Nm
	All	M18 x 1.5		35 Nm
	All	M22 x 1.5		60 Nm
2AZ Oil pan on engine block	All	M6 8.8		10 Nm
	All	M6 10.9		12 Nm
	N40/N42/N45/N46	M8 8.8	Replace screws	30 Nm
	All others	M8 8.8		22 Nm
Oil sump, lower section to upper section	All	M6 8.8		10 Nm
	All	M8 8.8		22 Nm
Oil sump bottom section to top section with microencapsulated screws	All	M6 10.9	Replace screws	12 Nm

OIL PAN TIGHTENING TORQUE SPECIFICATIONS

11 14 Case Covers

	Type	Thread	Measure
1AZ Timing case and timing case cover top and bottom	All	M6	10 Nm
	All	M7	15 Nm
	All	M8	22 Nm
	All	M10	47 Nm
2AZ End cover, front/rear, to engine block	All	M6	10 Nm
	All	M8	22 Nm
3AZ Bearing pin to timing case	M51/M41/M47	M42x1.5	65 Nm
4AZ Screw plug or connection piece to timing case cover Screw plug to timing case cover	M51/M41/M47	M20x1.5	30 Nm
Screw plug to timing case cover	M57/M47TU/M57TU	M30x1	70 Nm
Screw plug to timing case cover	M57/M47TU	M40x1.5	30 Nm
5AZ End cover, top/rear (water jacket), to engine block	N73	M6	10 Nm

CASE COVERS TIGHTENING TORQUE SPECIFICATIONS

11 21 Crankshaft and Bearings

	Type	Thread	Tightening specification	Measure
1AZ Increment wheel on crankshaft	S54	M5 10.9	Replace screws
			Jointing torque	5.0 Nm
			Torque angle	45 °
Increment wheel on crankshaft	All others	M5 10.9	Replace screws	13 Nm
Increment wheel on crankshaft	All others	M5 8.8	Replace screws	5.5 Nm

CRANKSHAFT AND BEARINGS TIGHTENING TORQUE SPECIFICATIONS

11 22 Flywheel

	Type	Tightening specification	Measure
1AZ Flywheel to crankshaft
Manual transmission flywheel to crankshaft	S62/M60/1/M60/2/M62	Do not install with screw retaining compound. Bolts are a component part of the flywheel. Screw threads oiled.	105 Nm
Manual transmission flywheel to crankshaft	M40/M42/M43/M43TU/M44/M70/S70/M73/M57TU	Replace screws	120 Nm
	All others	Replace screws	105 Nm
Automatic transmission flywheel to crankshaft	N62/N73	Replace screws	105 Nm
	All others	Replace screws	120 Nm
Manual transmission flywheel to crankshaft	N62	Do not install with screw retaining compound. Bolts are a component part of the flywheel. Screw threads oiled.	120 Nm

FLYWHEEL TIGHTENING TORQUE SPECIFICATIONS

11 23 Vibration Damper

	Type	Thread	Tightening specification	Measure
1AZ Vee belt pulley on crankshaft	M10		Replace nut	190 Nm
2AZ Vibration damper / hub to crankshaft	M20/M21/M50/M52/M52TU/S50 US/S52/M54/M56	M18x1.5	Replace screws	410 Nm
	M30/S14/S38/B35	M24 x 1.5	Replace nut	440 Nm
	M41/M47/M47TU/M51/M60/M62	M18x1.5	Replace screw
			Jointing torque	100 Nm
			Torque angle	60 °
			Torque angle	60 °
			Torque angle	30 °
	N62/N73	M18x1.5	Replace screw
			Jointing torque	100 Nm
			Torque angle	60 °
			Torque angle	60 °
			Torque angle	60 °
	M70/S70/M73	M18x1.5	Replace screw
			Jointing torque	100 Nm
			Torque angle	60 °
			Torque angle	60 °
	M57/M57TU/M67/M67TU	M10	Replace screws
			Jointing torque	40 Nm
			Torque angle	60 °
			Torque angle	60 °

VIBRATION DAMPER TIGHTENING TORQUE SPECIFICATIONS

	Type	Thread	Tightening specification	Measure
3AZ Belt pulley / vibration damper to hub	S38/B36	M8 10.9		34 Nm
	N40/N42/N45/N46/S38/B38	M8 10.9		34 Nm
	All/others	M8		22 Nm
4AZ Belt pulley to vibration damper	S38/B35	M8 8.8		22 Nm
	S50	M8 8.8		22 Nm
5AZ Sprocket with hub or hub to crankshaft	M40	M16 x 1.5	Replace screw	310 Nm
	M42/M43/M43TU/M44	M16 x 1.5	Replace screw	330 Nm
6AZ Hub to crankshaft	N40/N42/N45/N46	M16 x 1.5	Replace screw	300 Nm

VIBRATION DAMPER TIGHTENING TORQUE SPECIFICATIONS

11 24 Connecting Rods and Bearings

	Type	Tightening specification	Measure
1AZ Connecting rod bolts	M10/M30	Replace, wash and oil screws	55 Nm
	M20/M21/M40/M41/M42/M43/M43TU/M44/M47/M47TU/M50/M51/M52/M52TU/M54/M56/M57/M57TU/S52/S50 US/M70/S70/M73/N40/N42/N45/N46/N62/N73/N62S	Replace, wash and oil screws
		Application torque	5 Nm
		Jointing torque	20 Nm
		Torque angle	70 °
	M60/M62	Replace, wash and oil screws
		Application torque	5 Nm
		Jointing torque	20 Nm
		Torque angle	80 °
	M67	Replace screws, do not wash off screw coating
		Application torque	5 Nm
		Jointing torque	20 Nm
		Torque angle	85 °

CONNECTING RODS AND BEARINGS TIGHTENING TORQUE SPECIFICATIONS

11 31 Camshaft

	Type	Thread	Tightening specification	Measure
1AZ Camshaft bearing cap	All	M6		10 Nm
	All	M7		14 Nm
	All	M8		20 Nm
2AZ Sprocket to camshaft	M20/M21/M40	M10		65 Nm
3AZ Sprocket to camshaft flange	M60/M62	M6		15 Nm
	All / others	M6		10 Nm
	M50/M52/M52TU/M54/M56/S52/S50 US/M50/VANOS	M7
			Application torque	5 Nm
			Jointing torque	20 Nm
	All / others	M7		15 Nm
4AZ Sprocket to camshaft	M51/M41/M47/M57	M12 x 1.5	Replace screws
			Jointing torque	20 Nm
			Torque angle	35 °
	M47TU/M57TU	M12 x 1.5	Replace screws
			Jointing torque	20 Nm
			Torque angle	50 °
	M67	M12 x 1.5	Replace screws
			Jointing torque	20 Nm
			Torque angle	90 °
5AZ Toothed shaft to inlet camshaft	M52/S52/S50 US/M50/VANOS	M14 x1.5
			Jointing torque	40 Nm
			Torque angle	60 °

CAMSHAFT TIGHTENING TORQUE SPECIFICATIONS

	Type	Thread	Measure
6AZ Flange to camshaft	M30		145 Nm
7AZ Screw plug for chain tensioner	M50/S50 US/S62	M22 x 1.5	50 Nm
	All / others	M22 x 1.5	40 Nm
8AZ Cylinder for chain tensioner plunger	M67	M22 x 1.5	45 Nm
	N40/N42/N45/N46/N62/N73	M22 x 1.5	65 Nm
	M50/M52/M52TU/M54/M56/S52/S50 US	M26 x 1.5	70 Nm
	All / others	M26 x 1.5	50 Nm
9AZ Bearing flange on engine block	M60	M6	13 Nm
10AZ Reversing rail on engine block	M62/S62	M6/M7	14 Nm
11AZ Screw-in pin on camshaft	All	M7	20 Nm
Nut on screw-in pin	All	M6	10 Nm
12AZ Bearing pin for sliding and tensioning rails	M41/M47/M47TU/M51 /M57/M57TU	M16 x 1.5	20 Nm
	M67	M16 x 1.5	26 Nm
13AZ Signal disk to camshaft	S62/S54	M16 x 1.5	50 Nm
14AZ Sensor gear to camshaft	N62/N73	M14 x 1.5	30 Nm

CAMSHAFT TIGHTENING TORQUE SPECIFICATIONS

11 36 Variable Camshaft Control

	Type	Thread	Tightening specification	Measure
1AZ 4/2-way valve/solenoid valve to VANOS housing	M52/M52TU/M54/M56/S52/S50 US/M50/VANOS			30 Nm
2AZ Banjo bolt to VANOS adjustment unit	M52/M52TU/M54/M56/S52/S50 US/M50/ VANOS	M14 x 1.5		32 Nm
3AZ Screw plug to VANOS adjustment unit	M52/M52TU/M54/M56/S52/S50 US/M50/ VANOS	M22 x 1.5		50 Nm
4AZ Left-hand thread: Set screw for hydraulic piston to toothed shaft	M52TU/M54/M56	M6		10 Nm
5AZ Hydraulic line for VANOS to oil filter equipment carrier	M52/M52TU/M54/M56/S52/S50 US/M50/VANOS			32 Nm
6AZ Collar nut on spline shaft	S50	M6		9 Nm
7AZ Cover to VANOS adjustment unit (hydraulic piston inlet side)	S50	M5		5 Nm
8AZ Filter screw to VANOS adjustment unit	S50	M10x1		12 Nm
9AZ Pressure line to VANOS adjustment unit	S62/S54	M10 x 1		13 Nm
Pressure line to pressure accumulator and VANOS adjustment unit	S50	M12 x 1		20 Nm
10AZ Cover for solenoid valve to VANOS adjustment unit	S50/B30	M5 8.8		6 Nm
	S50/B32	M5 10.9		8Nm
	S62	M7 10.9		19 Nm
11AZ Cover to VANOS adjustment unit (exhaust side)	S54/S50/B32	M6 10.9		13 Nm
12AZ Solenoid valve on distributor	M62/VANOS	M27x1.5		25 Nm
13AZ Left-hand thread: Exhaust chain wheel to exhaust camshaft	M62/VANOS	M12 x 1.5		125 Nm
14AZ Left-hand thread: VANOS adjustment unit to inlet camshaft	M62/VANOS	M12 x 1.5		110 Nm
15AZ Left-hand thread: Nut of sensor gear screw fitting	M62/VANOS	M18x1.5		40 Nm
16AZ Adjustment unit to exhaust or inlet camshaft	N40/N42/N45/N46	M10x1	Replace screws
			Jointing torque	20 Nm
			Torque angle	90 °
			Torque angle	90 °
	N62/N73	M10x1	Replace screws
			Torque	80 Nm
17AZ Non-return valve	N62/N73	M14x1.5		20 Nm

VARIABLE CAMSHAFT CONTROL TIGHTENING TORQUE SPECIFICATIONS

11 41 Oil Pump with Strainer and Drive

	Type	Thread	Measure
1AZ Screw plug for pressure relief valve	M10/M30		40 Nm
	M20		30 Nm
2AZ Oil pump to crankcase	N62/N73	M8 10.9	34 Nm
	All others	M8	23 Nm
3AZ Oil pump cover	All	M6	10 Nm
4AZ Sprocket to oil pump	All	M6	10 Nm
	N40/N42/N45/N46	M10 x 1	30 Nm
	All others	M10 x 1	25 Nm
	All	M10	45 Nm
5AZ Oil pump to balancing shaft housing	M47TU	M6 10.9	14 Nm
	M47TU	M7 10.9	25 Nm

OIL PUMP WITH STRAINER AND DRIVE TIGHTENING TORQUE SPECIFICATIONS

11 42 Oil Filter and Pipes

	Type	Thread	Measure
1AZ Oil filter (one-way cartridge) (tightening torque by hand as specified on easy-change filter)	All		Nm
2AZ Full flow oil filter (cover)	All	M8	22 Nm
	All	M10	33 Nm
	All	M12	33 Nm
Screwed-on cover	All		25 Nm
3AZ Oil filter housing and lines on crankcase	All	M8	22 Nm
	All	M20 x 1.5	40 Nm

OIL FILTER AND PIPES TIGHTENING TORQUE SPECIFICATIONS

	Type	Thread	Measure
4AZ Oil filter drain plug	M21/S38	Hollow bolt	20 Nm
	M21	Full length screw in aluminum	10 Nm
	M21	Full length screw in threaded insert	23 Nm
5AZ Oil drain line to oil filter and upper oil sump section	M60/1/M60/2/M62/M70/S70/M73/S62	Banjo bolt M14x1.5	30 Nm
6AZ Oil line to bearing points and camshaft lubrication	All	M6	10 Nm
7AZ Oil line for camshaft lubrication on cylinder head	All	Banjo bolt M8x1	10 Nm
	N40/N42/N45/N46	Banjo bolt M7x1	10 Nm
	All	M5	5 Nm
8AZ Oil drain line from oil separator to upper oil sump section	E53/M62	Banjo bolt M12x1.5	25 Nm

OIL FILTER AND PIPES TIGHTENING TORQUE SPECIFICATIONS

	Type	Thread	Measure
8AZ Oil cooler oil pipes to oil filter housing	All	M8	22 Nm
9AZ Oil pipes to turbocharger	All	M8	22 Nm
10AZ Oil lines from turbocharger to engine block Hollow bolt	All	M16x 1.5	40 Nm
11AZ Oil supply pipe to turbocharger
Hollow bolt All			25 Nm
Coupling nut	All		30 Nm
Oil return line to turbocharger and cylinder crankcase (hose clamp)		M47TU/M57/M57TU/M67	3 Nm

OIL FILTER AND PIPES TIGHTENING TORQUE SPECIFICATIONS

11 51 Water Pump and Drive

	Type	Thread	Measure
1AZ Water pump to crankcase	All	M6	10 Nm
	All	M7	15 Nm
	All	M8	22 Nm
2AZ Water pump pump to power steering	N40/N42/N45/N46	M8 10.9	32 Nm

WATER PUMP WITH DRIVE TIGHTENING TORQUE SPECIFICATIONS

11 52 Fan

	Type	Measure
1AZ Fan clutch on water pump Coupling nut (left-hand threads)	All	40 Nm
	M54	45 Nm
2AZ Fan to fan clutch	All	10 Nm

FAN TIGHTENING TORQUE SPECIFICATIONS

11 53 Thermostat and Connections

	Type	Thread	Tightening specification	Measure
1AZ Thermostat housing	All	M6		10 Nm
2AZ Bleeder screw	All	M8		8 Nm

THERMOSTAT AND CONNECTORS TIGHTENING TORQUE SPECIFICATIONS

11 61 Intake manifold

	Type	Thread	Measure
1AZ Intake manifold on cylinder head	All	M8	22 Nm
	All	M7	15 Nm
	All	M6	10 Nm
2AZ Soundproofing hood to holder	M60/1/M60/2/M62	M6	8 Nm

INTAKE MANIFOLD TIGHTENING TORQUE SPECIFICATIONS

11 62 Exhaust manifold

	Type	Thread	Tightening specification	Measure
1AZ Exhaust manifold to cylinder head Coat screw connections with CRC copper paste	All	M6	Replace nuts	10 Nm
	M50/M52/M52TU/M54/M56/S52/S50 US	M7	Replace nuts	20 Nm
	All/ others	M7	Replace nuts	15 Nm
	M10	M8	Upper row of staybolts installed with bolt cement
				23 Nm
	M21	M8		12 Nm
			Replace nuts Retighten after 2000 km Slacken nuts by a 1/4 turn
				12 Nm
	M41/M47/M47TU/M51/M57/M57TU	M8	Replace nuts	20 Nm
	All/ others	M8	Replace nuts	23 Nm

EXHAUST MANIFOLD TIGHTENING TORQUE SPECIFICATIONS

11 78 Emissions-control, Lambda oxygen sensor

	Type	Thread	Tightening specification	Measure
1AZ Oxygen control sensor; oxygen monitor sensor	All	M18 x 1.5		50 Nm

EMISSIONS-CONTROL, LAMBDA OXYGEN SENSOR TIGHTENING TORQUE SPECIFICATIONS

Engine - Tightening Torques BMW M3 E46

11 11 Engine block

11 12 Cylinder Head with Cover

11 13 Oil Pan

11 14 Case Covers

11 21 Crankshaft and Bearings

11 22 Flywheel

11 23 Vibration Damper

11 24 Connecting Rods and Bearings

11 31 Camshaft

11 36 Variable Camshaft Control

11 41 Oil Pump with Strainer and Drive

11 42 Oil Filter and Pipes

11 51 Water Pump and Drive

11 52 Fan

11 53 Thermostat and Connections

11 61 Intake manifold

11 62 Exhaust manifold

11 78 Emissions-control, Lambda oxygen sensor

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