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Engine - Technical Data (n52) BMW Z4 E89

Mechanical ~351 words

11 31 Camshaft N52K B25

Guide bearing (width)	Mm	20.000 +0.052
Radial play	Mm	0.054...0.099
Axial play	Mm	0.020...0.162

CAMSHAFT SPECIFICATION

11 31 Camshaft N52K B30

Guide bearing (width)	Mm	20.000 +0.052
Radial play	Mm	0.054...0.099
Axial play	Mm	0.020...0.162

CAMSHAFT SPECIFICATION

11 24 Connecting Rods and Bearings N52K B25

Large connecting rod eye (without bearing)	Mm	53.600 +0.016
Conrod bushing: Inside diameter	Mm	20.000 +0.013 +0.004
Connecting rod bearing, installation clearance	Mm	0.025... 0.061
Permissible total deviation of connecting rods in one engine (without bearing shells)	G	± 5

CONNECTING RODS AND BEARINGS SPECIFICATION

11 24 Connecting Rods and Bearings N52K B30

Large connecting rod eye (without bearing)	Mm	53.600 +0.016
Conrod bushing: Inside diameter	Mm	20.000 +0.013 +0.004
Connecting rod bearing, installation clearance	Mm	0.025... 0.061
Permissible total deviation of connecting rods in one engine (without bearing shells)	G	± 5

CONNECTING RODS AND BEARINGS SPECIFICATION

11 21 Crankshaft and Bearings N52K B30

Ground sizes of conrod bearing journals
Identification mark (b)	Mm	49.9820... 49.9924
Identification mark (R)	Mm	49.9925... 50.0020
Radial conrod bearing play	Mm	0.025... 0.061

CRANKSHAFT AND BEARINGS SPECIFICATION

11 21 Crankshaft and Bearings N52K B25

Ground sizes of conrod bearing journals
Identification mark (b)	Mm	49.9820... 49.9924
Identification mark (R)	Mm	49.9925... 50.0020
Radial conrod bearing play	Mm	0.025... 0.061

CRANKSHAFT AND BEARINGS SPECIFICATION

Ground sizes of main bearing journals		Main bearing journal
Original (designation S1)	Mm	55.998... 55.993
Original (designation S2)	Mm	55.992... 55.987
Original (designation S3)	Mm	55.986... 55.981
Crankshaft bearing clearance, radial	Mm	0.020... 0.046
Max. permitted runout at centre crankshaft journal	Mm	0.150

CRANKSHAFT AND BEARINGS SPECIFICATION

Grinding stages, crankshaft guide bearing
Standard	Mm	24.0 F8
Crankshaft axial play	Mm	0.060... 0.250

CRANKSHAFT AND BEARINGS SPECIFICATION

Grinding stages, crankshaft guide bearing
Standard	Mm	24.0 F8
Crankshaft axial play	Mm	0.060... 0.250

CRANKSHAFT AND BEARINGS SPECIFICATION

Ground sizes of main bearing journals		Guide bearing journal
Original (designation S1)	Mm	64.998... 64.993
Original (designation S2)	Mm	64.992... 64.987
Original (designation S3)	Mm	64.986... 64.981
Crankshaft bearing clearance, radial	Mm	0.020... 0.046
Max. permitted runout at centre crankshaft journal	Mm	0.150

CRANKSHAFT AND BEARINGS SPECIFICATION

11 12 Cylinder Head with Cover N52K B25

Cylinder head height: Original dimension	Mm	112.000 ± 0.050
Machining limit	Mm	111.700 ± 0.050
Valve guides are not available as replacement parts.
Inside diameter of installed valve guide
Original inlet valve	Mm	5.000 +0.012
Original exhaust valve	Mm	6.000 +0.012
Tilt clearance, maximum (wear between valve and valve guide)	Mm	0.500

CYLINDER HEAD WITH COVER SPECIFICATION

11 12 Cylinder Head with Cover N52K B30

Cylinder head height: Original dimension	Mm	112.000 ± 0.050
Machining limit	Mm	111.700 ± 0.050
Valve guides are not available as replacement parts.
Inside diameter of installed valve guide
Original inlet valve	Mm	5.000 +0.012
Original exhaust valve	Mm	6.000 +0.012
Tilt clearance, maximum (wear between valve and valve guide)	Mm	0.500

CYLINDER HEAD WITH COVER SPECIFICATION

11 12 Cylinder Head with Valve Seat Cover N52K B25

Valve seat angle	°	45
Correction angle: outer	°	15
Correction angle: inner	°	60
Valve seat width: Inlet	Mm	1.0 +0.1
Valve seat width: Exhaust	Mm	1.2 +0.1
Valve seat
Valve seat surface: Outside dia. inlet	Mm	27.7 +0.1
Valve seat surface: Outside dia. exhaust	Mm	26.6 +0.1

CYLINDER HEAD WITH VALVE SEAT COVER SPECIFICATION

11 12 Cylinder Head with Valve Seat Cover N52K B30

Valve seat angle	°	45
Correction angle: outer	°	15
Correction angle: inner	°	60
Valve seat width: Inlet	Mm	1.0 +0.1
Valve seat width: Exhaust	Mm	1.2 +0.1
Valve seat
Valve seat surface: Outside dia. inlet	Mm	27.7 +0.1
Valve seat surface: Outside dia. exhaust	Mm	26.6 +0.1

CYLINDER HEAD WITH VALVE SEAT COVER SPECIFICATION

11 11 Engine Block, Cylinder Crankcase N52K B25

Bore	Stage 0 a)	Mm	82.000+0.014
Bore	Stage 00 (1) )	Mm
Bore	Stage 1 (1) )	Mm	82.250 +0.014
Permitted out-of-round of cylinder bore (1) )		Mm	0.005
Permitted conicity of cylinder bore (1) )		Mm	0.010
Permissible total wear tolerance between piston and cylinder (engine operated)		Mm	0.150
(1) new status or recondition

(1)	New status or recondition

ENGINE BLOCK, CYLINDER CRANKCASE SPECIFICATION

11 11 Engine Block, Cylinder Crankcase N52K B30

Bore	Stage 0 (1) )	Mm	85.000+0.014
Bore	Stage 00 (1) )	Mm
Bore	Stage 1 (1) )	Mm	85.250 +0.014
Permitted out-of-round of cylinder bore (1) )		Mm	0.005
Permitted conicity of cylinder bore (1) )		Mm	0.010
Permissible total wear tolerance between piston and cylinder (engine operated)		Mm	0.150
(1) new status or recondition

(1)	New status or recondition

ENGINE BLOCK, CYLINDER CRANKCASE SPECIFICATION

11 00 Engine in general N52K B25

Cylinder		6
Bore	Mm	82
Stroke	Mm	79
Effective displacement	Cm 3	2497
Compression ratio	1	11
Max. permissible engine speed	Rpm	6500±50
Permissible constant speed	Rpm	6300
Compression pressure: Minimum and maximum values depending on position of Valvetronic.		9... 18
Compression pressure: Maximum deviation of all cylinders to each other.	Bar	2

ENGINE SPECIFICATION

11 00 Engine in general N52K B30

Cylinder		6
Bore	Mm	85
Stroke	Mm	88
Effective displacement	Cm 3	2996
Compression ratio	1	10.7
Max. permissible engine speed	Rpm	6550±50
Permissible constant speed	Rpm	6300
Compression pressure: Minimum and maximum values depending on position of Valvetronic.		9... 18
Compression pressure: Maximum deviation of all cylinders to each other.	Bar	2

ENGINE SPECIFICATION

11 41 Oil Pump with Strainer and Drive N52K B25

Oil pressure at idle (engine at normal operating temperature)	Min bar	1.5
Control pressure (engine at normal operating temperature)	Bar	4.0... 6.0

OIL PUMP WITH STRAINER AND DRIVE SPECIFICATION

Oil pressure at idle (engine at normal operating temperature)	Min bar	1.5
Control pressure (engine at normal operating temperature)	Bar	4.0... 6.0

OIL PUMP WITH STRAINER AND DRIVE SPECIFICATION

11 41 Oil Pump with Strainer and Drive N53/N52K B25

Regulated pressure

Bar

Observe diagnosis instruction

OIL PUMP WITH STRAINER AND DRIVE SPECIFICATION

11 41 Oil Pump with Strainer and Drive N53/N52K B30

Regulated pressure

Bar

Observe diagnosis instruction

OIL PUMP WITH STRAINER AND DRIVE SPECIFICATION

11 40 Oil Supply N52K B25 B30

Oil grades and consumption: see ENGINE - OPERATING FLUIDS
Filling capacity, engine oil change with oil filter element	Litres	6.50
Filling capacity engine oil change with oil filter element for auxiliary engine oil cooler	Litres	7.00

OIL SUPPLY SPECIFICATION

11 25 Pistons with Rings and Pins N18

1st groove
End clearance	Mm	0.20... 0.40
End clearance (wear limit)	Mm	0.95
Side clearance	Mm	0.015... 0.070
2nd groove
End clearance	Mm	0.30... 0.55
End clearance (wear limit)	Mm	1.06
Side clearance	Mm	0.015... 0.060
3rd groove
End clearance	Mm	0.10... 0.40
End clearance (wear limit)	Mm	0.82
Side clearance	Mm	0.040... 0.10

PISTONS WITH RINGS AND PINS SPECIFICATION

11 25 Pistons with Rings and Pins N52K B25

Piston and pin are paired to each other - replace together only.
Measuring point "A" (position)	Mm	10
Piston diameter at measuring point "A"
Original (new dimension)	Mm	81.985 ±0.014
Repair stage (new dimension)	Mm	%
Oversize (new dimension)	Mm	82.235 ±0.014
Piston installation clearance (piston new)	Mm	0.000...0.043
Piston installation clearance (piston worn)	Mm	0.020...0.047
Permissible total wear tolerance between piston and cylinder (engine operated)	Mm	0.150

PISTONS WITH RINGS AND PINS SPECIFICATION

1st groove
End clearance	Mm	0.180... 0.330
Axial play	Mm	0.020... 0.060
2nd groove
End clearance	Mm	0.300... 0.500
Axial play	Mm	0.020... 0.060
3rd groove
End clearance	Mm	Cannot be measured
Axial play	Mm	Cannot be measured

PISTONS WITH RINGS AND PINS SPECIFICATION

11 25 Pistons with Rings and Pins N52K B30

1st groove
End clearance	Mm	0.150... 0.300
Axial play	Mm	0.020... 0.070
2nd groove
End clearance	Mm	0.300... 0.500
Axial play	Mm	0.020... 0.060
3rd groove
End clearance	Mm	Cannot be measured
Axial play	Mm	Cannot be measured

PISTONS WITH RINGS AND PINS SPECIFICATION

Piston and pin are paired to each other - replace together only.
Measuring point "A" (position)	Mm	14
Piston diameter at measuring point "A"
Original (new dimension)	Mm	84.990 ±0.010
Repair stage (new dimension)	Mm	%
Oversize (new dimension)	Mm	85.240 ±0.010
Piston installation clearance (piston new)	Mm	0.000...0.034
Piston installation clearance (piston worn)	Mm	0.020...0.047
Permissible total wear tolerance between piston and cylinder (engine operated)	Mm	0.150

PISTONS WITH RINGS AND PINS SPECIFICATION

11 34 Valves with Springs N52K B25

Plate dia.
Inlet	Mm	32.2 ±0.05
Exhaust	Mm	27.0± 0.1
Stem
Inlet	Mm	5.0 -0.1 -0.06
Exhaust	Mm	6.0 -0.1 -0.06

VALVES WITH SPRINGS SPECIFICATION

11 34 Valves with Springs N52K B30

Plate dia.
Inlet	Mm	34.2 ±0.05
Exhaust	Mm	29.0 ±0.1
Stem
Inlet	Mm	5.0 -0.1 -0.06
Exhaust	Mm	6.0 -0.1 -0.06

VALVES WITH SPRINGS SPECIFICATION

11 23 Vibration Damper N52K B25

Max. permitted radial runout	Mm	0.100
Max. permitted axial runout	Mm	0.100

VIBRATION DAMPER SPECIFICATION

11 23 Vibration Damper N52K B30

Max. permitted radial runout	Mm	0.100
Max. permitted axial runout	Mm	0.100

VIBRATION DAMPER SPECIFICATION