Engine - Tightening Torques (m54) — BMW X3 E83 (2003-2006)

11 11 Engine block

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

11 11 ENGINE BLOCK TIGHTENING SPECIFICATION

	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 N.m
			Torque angle	45°
	N62 / N62TU / N73	M8		34 N.m
Threaded support sleeves	M70 / M60 / M62 / S70 / M73 / S62			10 N.m
	N62 / N62TU / N73			6 N.m
4AZ Struts/bracing shell	M67	M10.9		66 N.m
		M10		43 N.m
		M8		22 N.m
5AZ Drain plug for coolant in engine block		M14 x 1.5		25 N.m
6AZ Main oil gallery seal plugs		M16 x 1.5		34 N.m
		M18x1.5		40 N.m
	N62 / N62TU / N73	M18x1.5	Insert screw with Loctite	25 N.m
	N40 / N42 / N45 / N46	M16x1.5		36 N.m
Main oil gallery, rear (seal plugs with control valve)	M62 / S62	M18x1		10 N.m
7AZ Oil spray nozzle on engine block		M6		10 N.m
Oil spray nozzle screwed into bearing seat (coat thread with Loctite 243)	M73	M8x1		5 N.m
Oil spray nozzle to engine block (banjo bolt)		M8x1		12 N.m
8AZ Pressure holding valve to crankcase (1bar)	S54 / B32			20 N.m

11 11 ENGINE BLOCK TIGHTENING SPECIFICATION

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 N.m
			Loosen all bolts 1/2 turn
			Jointing torque	50 N.m
			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 N.m
			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 N.m
			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 N.m
			Torque angle	90°
			Torque angle	90°

11 12 CYLINDER HEAD WITH COVER TIGHTENING SPECIFICATION

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

11 12 CYLINDER HEAD WITH COVER TIGHTENING SPECIFICATION

11 43 Guide tube for oil dipstick

	Type	Thread	Tightening Specification	Measure
1 AZ		M8		22 Nm
2 AZ	N62TU	M8		19 Nm

GUIDE TUBE FOR OIL DIPSTICK TIGHTENING SPECIFICATION

11 13 Oil Pan

	Type	Thread	Tightening specification	Measure
1AZ Oil drain plug		M12 x 1.5		25 N.m
		M18 x 1.5		35 N.m
		M22 x 1.5		60 N.m
2AZ Oil pan on engine block		M6 8.8		10 N.m
		M6 10.9		12 N.m
	N40 / N42 / N45 / N46	M8 8.8	Replace screws	30 N.m
		M8 8.8		22 N.m
Oil sump, lower section to upper section		M6 8.8		10 N.m
	N62TU	M8		24 N.m
		M8 8.8		22 N.m
Oil sump bottom section to top section with microencapsulated screws		M6 10.9	Replace screws	12 N.m
Oil sump upper section to crankcase	N62TU	M6		10 N.m
	N62TU	M8		20 N.m

11 13 OIL PAN TIGHTENING SPECIFICATION

11 14 Case Covers

	Type	Thread	Measure
1AZ Timing case and timing case cover top and bottom		M6	10 N.m
		M7	15 N.m
		M8	22 N.m
		M10	47 N.m
2AZ End cover, front/rear, to engine block		M6	10 N.m
		M8	22 N.m
3AZ Bearing pin to timing case cover	M51 / M41 / M47	M42x1.5	65 N.m
4AZ Screw plug or connection piece to timing case cover Screw plug to timing case cover	M51 / M41 / M47	M20x1.5	30 N.m
Screw plug to timing case cover	M57 / M47TU / M57TU	M30x1	70 N.m
Screw plug to timing case cover	M57 / M47TU	M40x1.5	30 N.m
5AZ End cover, top/rear (water jacket), to engine block	N62TU / N73	M6	10 N.m
6AZ Lower timing case cover to crankcase	N62TU	M8	20 N.m
7AZ Upper timing case to cylinder head	N62TU	M6	10 N.m
8AZ End cover, rear, to crankcase	N62TU	M6	10 N.m

11 14 CASE COVERS TIGHTENING SPECIFICATION

For specifications, refer to 11 11 ENGINE BLOCK .

11 24 Connecting Rods and Bearings

	Type	Tightening specification	Measure
1AZ Connecting rod bolts	M10 / M30	Replace, wash and oil screws	55 N.m
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 / N62TU		Replace, wash and oil screws
		Application torque	5 N.m
		Jointing torque	20 N.m
		Torque angle	70°
	M60 / M62	Replace, wash and oil screws
		Application torque	5 N.m
		Jointing torque	20 N.m
		Torque angle	80°
	M67	Replace screws, do not wash off screw coating
		Application torque	5 N.m
		Jointing torque	20 N.m
		Torque angle	85°

11 24 CONNECTING RODS AND BEARINGS TIGHTENING SPECIFICATION

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 N.m
			Torque angle	45°
Increment wheel on crankshaft		M5 10.9	Replace screws	13 N.m
Increment wheel on crankshaft		M5 8.8	Replace screws	5.5 N.m

11 21 CRANKSHAFT AND BEARINGS TIGHTENING SPECIFICATION

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 N.m
Manual transmission flywheel to crankshaft	M40 / M42 / M43 / M43TU / M44 / M70 / S70 / M73 / M57TU	Replace screws	120 N.m
		Replace screws	105 N.m
Automatic transmission flywheel to crankshaft	N62 / N62TU / N73	Replace screws	105 N.m
Automatic transmission flywheel to crankshaft		Replace screws	120 N.m
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 N.m

11 22 FLYWHEEL TIGHTENING SPECIFICATION

11 23 Vibration Damper

	Type	Thread	Tightening specification	Measure
1AZ Vee belt pulley on crankshaft	M10		Replace nut	190 N.m
2AZ Vibration damper / hub to crankshaft	M20 / M21 / M50 / M52 / M52TU / S50 US / S52 / M54 / M56	M18x1.5	Replace screws	410 N.m
	M30 / S14 / S38 / B35	M24 x 1.5	Replace nut	440 N.m
	M41 / M47 / M47TU / M51 / M60 / M62	M18x1.5	Replace screw
			Jointing torque	100 N.m
			Torque angle	60°
			Torque angle	60°
			Torque angle	30°
	N62 / N62TU / N73	M18x1.5	Replace screw
			Jointing torque	100 N.m
			Torque angle	60°
			Torque angle	60°
			Torque angle	60°
	M70 / S70 / M73	M18x1.5	Replace screw
			Jointing torque	100 N.m
			Torque angle	60°
			Torque angle	60°
	M57 / M57TU / M67 / M67TU	M10	Replace screws
			Jointing torque	40 N.m
			Torque angle	60°
			Torque angle	60°

11 23 VIBRATION DAMPER TIGHTENING SPECIFICATION

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

11 23 VIBRATION DAMPER TIGHTENING SPECIFICATION

For specifications, refer to 11 11 ENGINE BLOCK .

For specifications, refer to 11 11 Engine block .

For specifications, refer to 11 24 CONNECTING RODS AND BEARINGS .

11 31 Camshaft

	Type	Thread	Tightening specification	Measure
1AZ Camshaft bearing cap		M6		10 N.m
		M7		14 N.m
		M7-8.8		15 N.m
		M8		20 N.m
2AZ Sprocket to camshaft	M20 / M21 / M40	M10		65 N.m
3AZ Sprocket to camshaft flange	M60 / M62	M6		15 N.m
		M6		10 N.m
	M50 / M52 / M52TU / M54 / M56 / S52 / S50 US / M50 / VANOS	M7
			Application torque	5 N.m
			Jointing torque	20 N.m
		M7		15 N.m
4AZ Sprocket to camshaft	M51 / M41 / M47 / M57	M12 x 1.5	Replace screws
			Jointing torque	20 N.m
			Torque angle	35°
	M47TU / M57TU	M12 x 1.5	Replace screws
			Jointing torque	20 N.m
			Torque angle	50°
	M67	M12 x 1.5	Replace screws
			Jointing torque	20 N.m
			Torque angle	90°
5AZ Toothed shaft to inlet camshaft	M52 / S52 / S50 US / M50 / VANOS	M14 x 1.5
			Jointing torque	40 N.m
			Torque angle	60°

11 31 CAMSHAFT TIGHTENING SPECIFICATION

	Type	Thread	Measure
6AZ Flange to camshaft	M30		145 N.m
7AZ Screw plug for chain tensioner	M50 / S50 US / S62	M22 x 1.5	50 N.m
		M22 x 1.5	40 N.m
8AZ Cylinder for chain tensioner plunger	M67	M22 x 1.5	45 N.m
	N40 / N42 / N45 / N46 / N62 / N62TU / N73	M22 x 1.5	65 N.m
	M50 / M52 / M52TU / M54 / M56 / S52 / S50 US	M26 x 1.5	70 N.m
		M26 x 1.5	50 N.m
9AZ Bearing flange on engine block	M60	M6	13 N.m
10AZ Reversing rail on engine block	M62 / S62	M6 /M7	14 N.m
11AZ Screw-in pin on camshaft		M7	20 N.m
Nut on screw-in pin		M6	10 N.m
12AZ Bearing pin for sliding and tensioning rails	M41 / M47 / M47TU / M51 / M57 / M57TU	M16 x 1.5	20 N.m
	M67	M16 x 1.5	26 N.m
13AZ Signal disk to camshaft	S62 / S54	M16 x 1.5	50 N.m
14AZ Sensor gear to camshaft	N62 / N62TU / N73	M14 x 1.5	30 N.m

11 31 CAMSHAFT TIGHTENING SPECIFICATION

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 N.m
2AZ Banjo bolt to VANOS adjustment unit	M52 / M52TU / M54 / M56 / S52 / S50 US / M50 / VANOS	M14 x 1.5		32 N.m
3AZ Screw plug to VANOS adjustment unit	M52 / M52TU / M54 / M56 / S52 / S50 US / M50 / VANOS	M22 x 1.5		50 N.m
4AZ Left-hand thread: Set screw for hydraulic piston to toothed shaft	M52TU / M54 / M56	M6		10 N.m
5AZ Hydraulic line for VANOS to oil filter equipment carrier	M52 / M52TU / M54 / M56 / S52 / S50 US / M50 / VANOS			32 N.m
6AZ Collar nut on spline shaft	S50	M6		9 N.m
7AZ Cover to VANOS adjustment unit (hydraulic piston inlet side)	S50	M5		5 N.m
8AZ Filter screw to VANOS adjustment unit	S50	M10x1		12 N.m
9AZ Pressure line to VANOS adjustment unit	S62 / S54	M10 x 1		13 N.m
Pressure line to pressure accumulator and VANOS adjustment unit	S50	M12 x 1		20 N.m
10AZ Cover for solenoid valve to VANOS adjustment unit	S50 / B30	M5 8.8		6 N.m
	S50 / B32	M5 10.9		8 N.m
	S62	M7 10.9		19 N.m
11AZ Cover to VANOS adjustment unit (exhaust side)	S54 / S50 / B32	M6 10.9		13 N.m
12AZ Solenoid valve on distributor	M62 / VANOS	M27x1.5		25 N.m
13AZ Left-hand thread: Exhaust chain wheel to exhaust camshaft	M62 / VANOS	M12 x 1.5		125 N.m
14AZ Left-hand thread: VANOS adjustment unit to inlet camshaft	M62 / VANOS	M12 x 1.5		110 N.m
15AZ Left-hand thread: Nut of sensor gear screw fitting	M62 / VANOS	M18x1.5		40 N.m
16AZ Adjustment unit to exhaust or inlet camshaft	N40 / N42 / N45 / N46	M10x1	Replace screws
			Jointing torque	20 N.m
			Torque angle	90°
			Torque angle	90°
	N62 / N62TU / N73	M10x1	Replace screws
			Torque	80 N.m
17AZ Non-return valve	N62 / N62TU / N73	M14x1.5		20 N.m

11 36 VARIABLE CAMSHAFT CONTROL TIGHTENING SPECIFICATION

11 41 Oil Pump with Strainer and Drive

	Type	Thread	Measure
1AZ Screw plug for pressure relief valve	M10 / M30		40 N.m
	M20		30 N.m
2AZ Oil pump to crankcase	N62 / N62TU / N73	M8 10.9	34 N.m
		M8	23 N.m
3AZ Oil pump cover		M6	10 N.m
4AZ Sprocket to oil pump		M6	10 N.m
	N40 / N42 / N45 / N46	M10 x 1	30 N.m
		M10 x 1	25 N.m
		M10	45 N.m
5AZ Oil pump to balancing shaft housing	M47TU	M6 10.9	14 N.m
	M47TU	M7 10.9	25 N.m

11 41 OIL PUMP WITH STRAINER AND DRIVE TIGHTENING SPECIFICATION

11 42 Oil Filter and Pipes

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

11 42 OIL FILTER AND PIPES TIGHTENING SPECIFICATION

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

11 42 OIL FILTER AND PIPES TIGHTENING SPECIFICATION

	Type	Thread	Measure
8AZ Oil cooler oil pipes to oil filter housing	All	M8	22 N.m
9AZ Oil pipes to turbocharger	All	M8	22 N.m
10AZ Oil lines from turbocharger to engine block Hollow bolt	All	M16 x 1.5	40 N.m
11AZ Oil supply pipe to turbocharger
Hollow bolt	All		25 N.m
Coupling nut	All		30 N.m
Oil return line to turbocharger and cylinder crankcase (hose clamp)	M47TU / M57 / M57TU / M67		3 N.m

11 42 OIL FILTER AND PIPES TIGHTENING SPECIFICATION

For procedure, refer to 11 43 GUIDE TUBE FOR OIL DIPSTICK .

11 51 Water Pump and Drive

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

11 51 WATER PUMP AND DRIVE TIGHTENING SPECIFICATION

11 53 Thermostat and Connections

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

11 53 THERMOSTAT AND CONNECTIONS TIGHTENING SPECIFICATION

11 61 Intake manifold

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

11 61 INTAKE MANIFOLD TIGHTENING SPECIFICATION

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 N.m
	M50 / M52 / M52TU / M54 / M56 / S52 / S50 US	M7	Replace nuts	20 N.m
	All / others	M7	Replace nuts	15 N.m
	M10	M8	Upper row of staybolts installed with bolt cement
				23 N.m
	M21	M8		12 N.m
			Replace nuts Retighten after 2000 km Slacken nuts by a 1/4 turn
				12 N.m
	M41 / M47 / M47TU / M51 / M57 / M57TU	M8	Replace nuts	20 N.m
	All / others	M8	Replace nuts	23 N.m

11 62 EXHAUST MANIFOLD TIGHTENING SPECIFICATION

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 N.m

11 78 EMISSIONS-CONTROL, LAMBDA OXYGEN SENSOR TIGHTENING SPECIFICATION

Engine - Tightening Torques (m54) BMW X3 E83

11 11 Engine block

11 12 Cylinder Head with Cover

11 43 Guide tube for oil dipstick

11 13 Oil Pan

11 14 Case Covers

11 24 Connecting Rods and Bearings

11 21 Crankshaft and Bearings

11 22 Flywheel

11 23 Vibration Damper

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 53 Thermostat and Connections

11 61 Intake manifold

11 62 Exhaust manifold

11 78 Emissions-control, Lambda oxygen sensor

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