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Technical specification
Year1972-1974
Type3
Identification letterK
Engine code3/1500
kW33
BHP45
RPM3800
No. of cylinders4 (OHV)
Capacity (Fiscal)[cc]1493
Compression Ratio7.5
Siutable for unleaded petrol (+ = Yes, - = No)+
Minimum octane rating91
Ignition systemSZ, CB
Fuel systemSolex 32 PHH
Ignition system
Ignition coilBosch 0 221 102 003
Ignition coil supply voltage[V]11
Primary resistance[Ohm]2.9-3.4
Firing order1-4-3-2
Distributor (ECM)Bosch 0 231 137 031
Contact breaker gap / trigger air gap[mm]0.4
Dwell angle[°] (%)44-50 (49-56)
Tuning and emission
Ignition timing (o = without vacuum, + = with vacuum)o
Ignition timing - basic BTDC[rpm]7.5/800-900
Vacuum check (+ = advance, - = retard)+
Vacuum range23-28
Vacuum starts[mbar]5
Vacuum ends[mbar]87
Idle speed[rpm]800-900
CO level @ idle speed, tailpipe[%]2.0-4.0
Spark plugs
Spark plugsBosch W8AC
Electrode gap[mm]0.7
Spark plugsChampion L86CC
Electrode gap[mm]0.7
Spark plugsNGK B5HS
Electrode gap[mm]0.7
Fuel system
Fuel pump delivery pressure[bar]0.35
Service checks and adjustments
Valve clearance - Inlet[mm]0.15 cold
Valve clearance - Exhaust[mm]0.15 cold
Compression Pressure[bar]7-10
Drive belt size - alternator[mm]9.5x900
Drive belt tension - alternator/PAS/AC[mm]5
Lubricants and capacities
Engine oil grade (moderate climate)10W/40
Engine oil classificationSG
Engine with filter[l]2.5
Gearbox 4/5 speed[l]2.5
Tightening torques
Cylinder head[Nm]10 / 32
Big end bearings[Nm]16 / 33
Flywheel / Driveplate[Nm]350
Spark plugs[Nm]35
Road wheels[Nm]120-130
Starting and charging
Battery12/60
Starter motorBosch EF(L)12V0.7
Minimum starting voltage[V]9
Maximum cranking amps[A]103-125
Alternator / RegulatorBosch
Voltage regulatorVA 14V 30A

Tags

aircooled, engine, 1500cc, specification