Technical data of engine (BMW K 1200 LT, 1998-2009) [Engine and systems: Engine repair]

Technical Data	K1200 LT
Engine, general
Engine design	In-line four-stroke engine installed longitudinally, with double overhead camshafts, liquid cooling and electronic fuel injection.
Location of engine number	At lower rear right of engine block
Cylinder bore, mm (in)	70.5 (2.77)
Stroke, mm (in)	75 (2.95)
Number of cylinders	4
Effective displacement, cc	1171
Compression ratio	10.8 : 1
Power output, kW	72
Max. torque, Nm	115
Permissible maximum engine speed, min^-1	8500
Idle speed, min^-1	950
Direction of rotation	Counter-clockwise, looking at ignition system
Compression test pressure
Good, bar (psi)	above 10.0 (142)
Normal, bar (psi)	8.5...10.0 (121...142)
Poor, bar (psi)	below 8.5 (121)
Lubrication system
Engine lubrication	Pressurised oil circuit
Oil filter	Full-flow type
Differential pressure to open bypass valve, bar (psi)	1.5 (21.4)
Oil pressure warning light comes on below, bar (psi)	0.2...0.5 (2.8...7.1)
Pressure relief valve opens at, bar (psi)	5.4 (76.8)
Oil content
With filter change l (Imp. pints/ US quarts)	3.6 (6.34/3.80)
Min/max l (Imp. pints/ US quarts)	0.8 (1.40/0.84)
Permissible oil consumption l/1000 km (miles per Imp. pint/miles per US quart)	1.0 (350/590)
Oil pump
Oil pump	Gear-type
Timing chain
Type	Pre-stretched, endless single roller chain with 128 links
Valves
Included valve angle: Inlet° Exhaust°	20.5 19.5
Valve clearances with engine cold (max. 35°C/95°F): Inlet valve, mm (in) Exhaust valve, mm (in)	0.15...0.20 (0.059...0.079) 0.25...0.30 (0.010...0.012)
Valve timing	for 3 mm (0.12 in) lift and valve clearance 0
Inlet opens Inlet closes Exhaust opens Exhaust closes	19° after TDC 13° after BDC 7° before BDC 25° before TDC
Valve head dia: Inlet, mm (in) Exhaust, mm (in)	26.5 (1.043) 23 (0.905)
Stem dia: Inlet, mm (in) Wear limit, mm (in) Exhaust, mm (in) Wear limit, mm (in)	4.966...4.980 (0.1955...0.1961) 4.946 (0.1947) 4.956...4.970 (0.1951...0.1957) 4.954 (0.1950)
Max. runout of valve head at valve seat: Inlet, exhaust, mm (in)	0.02 (0.0008)
Valve seat
Valve seat angle: Inlet° Exhaust°	45 45
Valve seat width: Inlet, mm (in) Wear limit, mm (in) Exhaust, mm (in) Wear limit, mm (in)	0.95...1.25 (0.037...0.049) 2.5 (0.10) 1.15...1.45 (0.045...0.057) 3.0 (0.12)
Valve seat extl. dia. (dimension for machining seat): Inlet, mm (in) Exhaust, mm (in)	25.60...26.00 (1.007...1.023) 22.15...22.55 (0.872...0.887)
Seat ring dia. (oversize +0.2 mm/+0.008 in): Inlet, mm (in) Exhaust, mm (in)	27.59...27.72 (1.086...1.091) 25.09...25.22 (0.987...0.992)
Seat dia. in cylinder head (oversize +0.2 mm/+0.008 in): Inlet, mm (in) Exhaust, mm (in)	27.70...27.91 (1.090...1.098) 25.20...25.41 (0.992...1.000)
Valve guide
Length of valve guide: Inlet, mm (in) Exhaust, mm (in) Valve guide, Extl. dia., mm (in) Bore in cylinder head, mm (in) Overlap, mm (in)	45 (1.77) 57.5 (2.26) 11.533...11.544 (0.4541...0.4545) 11.500...11.518 (0.4528...0.4535) 0.015...0.044 (0.0006...0.0017)
Repair stage: Oversize valve guide, Extl. dia., mm (in)	11.700...11.718 (0.4606...0.4613)
Valve guide: Intl. dia., mm (in) Wear limit, mm (in)	5.000...5.012 (0.1969...0.1973) 5.1 (0.20)
Valve spring
Extl. dia., mm (in)	21.3 (0.84)
Wire dia., mm (in)	3.05 (0.120)
Spring length, off-load, mm (in)	42.6 (1.68)
Wear limit, mm (in)	41.1 (1.62)
Camshaft
Inlet camshaft° Exhaust camshaft°	244 232
Guide bearing dia., mm (in) Wear limit, mm (in)	29.970...30.000 (1.1799...1.1811) 29.95 (1.179)
Guide bearing bore, mm (in)	30.020...30.041 (1.1819...1.1827)
Camshaft bearing bore, mm (in)	24.020...24.041 (0.9457...0.9465)
Radial clearance: Guide bearing, mm (in) Camshaft bearing, mm (in)	0.020...0.071 (0.0008...0.0028) 0.020...0.071 (0.0008...0.0028)
Cam base circle dia., mm (in)	30 (1.18)
Cam height, inlet, mm (in) Wear limit, mm (in)	37.989...38.033 (1.4957...1.4974) 37.620 (1.4811)
Cam height, exhaust, mm (in) Wear limit, mm (in)	37.619...37.681 (1.4811...1.4835) 37.250 (1.4666)
Tappets
Extl. dia., mm (in): Wear limit, mm (in) Bore dia. in cylinder head mm (in): Wear limit, mm (in) Radial clearance, mm (in): Wear limit, mm (in)	25.980...25.993 (1.0226...1.0234) 25.970 (1.0225) 26.065...26.086 (1.0262...1.0270) 26.170 (1.0303) 0.072...0.106 (0.0028...0.0042) 0.200 (0.0079)
Crankshaft
Main bearing and crankpin markings: no colour spot with colour spot	Grinding stage 0 Grinding stage 1 (-0.25 mm/-0.010 in)
Main bearing dia.: Grinding stage 0, mm (in) Grinding stage 1, mm (in) Main bearing radial play, mm (in): Wear limit, mm (in)	44.976...45.000 (1.7707...1.7716) 44.726...44.750 (1.7609...1.7618) 0.020...0.056 (0.0008.0.0022) 0.130 (0.0051)
Guide bearing width, mm (in): Axial play, mm (in) Wear limit, mm (in)	23.020...23.053 (0.9063...0.9076) 0.080...0.173 (0.0031...0.0068) 0.250 (0.0098)
Crankpin dia.: Grinding stage 0, mm (in) Grinding stage 1, mm (in)	37.976...38.000 (1.4951...1.4961) 37.726...37.750 (1.4853...1.4862)
Connecting rod
Big end bearing with bearing shell: Radial clearance, mm (in) Wear limit, mm (in)	0.030...0.066 (0.0012...0.0026) 0.130 (0.0051)
Piston pin bore dia. with bushing, mm (in)	17.006...17.017 (0.6695...0.6699)
Distance between centers, mm (in)	130.9...131.1 (5.15...5.16)
Permissible weight difference, g (oz.)	±4 (±0.14)
Cylinders
Bore: A, mm (in) Wear limit, mm (in) B, mm (in) Wear limit, mm (in)	70.495...70.505 (2.7754...2.7758) +0.05 (+0.002) 70.505...70.515 (2.7758...2.7762) +0.05 (+0.002)
Total wear clearance of piston and cylinder, mm (in)	0.130 (0.0051)
Permitted out-of-roundness of cylinder bore at 20 mm (0.79 in) from the top edge, mm (in)	0.05 (0.002)
Pistons
Piston dia., Make: KS	(Measuring plane A: see piston and cylinder check)
A, mm (in) Wear limit, mm (in) B, mm (in) Wear limit, mm (in) Installed clearance, mm (in): Wear limit, mm (in)	70.466...70.480 (2.7742...2.7748) 0.080 (0.0031) 70.476...70.490 (2.7747...2.7752) 0.080 (0.0031) 0.015...0.039 (0.0006...0.0015) 0.130 (0.0051)
Weight classes Weight group identification Weight difference in one group, g (oz.)	2 groups, stamped + or - 6 (0.21)
Direction of installation	Arrow on piston crown points forward
Piston rings
1st groove. Rectangular-section ring: Height, mm (in) Wear limit, mm (in) End gap, mm (in) Wear limit, mm (in) Side clearance, mm (in) Wear limit mm (in)	0.975...0.990 (0.0383...0.0389) 0.90 (0.035) 0.10...0.30 (0.004...0.012) 1.50 (0.059) 0.030...0.065 (0.0012...0.0026) 0.20 (0.007)
2nd groove. Taper-face oil-control ring: Height, mm (in) Wear limit, mm (in) End gap, mm (in) Wear limit mm (in) Side clearance, mm (in) Wear limit, mm (in)	1.195...1.170 (0.0470...0.0461) 1.10 (0.043) 0.10...0.30 (0.004...0.012) 1.50 (0.059) 0.005...0.035 (0.0002...0.0013) 0.20 (0.007)
3rd grooveЮ U-Flex, with spring: Height, mm (in) Wear limit, mm (in) Side clearance, mm (in) Wear limit, mm (in)	1.960...1.990 (0.0772...0.0783) 1.90 (0.074) 0.020...0.070 (0.0007...0.0027) 0.3 (0.01)
Installed direction of piston rings	"Top" marking uppermost
Piston pins
Piston pin dia.,mm (in): Wear limit, mm (in)	16.995...17.000 (0.6691...0.6693) 16.96 (0.667)
Radial play at conrod, mm (in): Wear limit, mm (in)	0.006...0.022 (0.0002...0.0008) 0.060 (0.002)

Technical data of engine (BMW K1200LT)