Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW1987L7 (E23) L6-3430CC 3.4L SOHC (M30)REPAIR AND DIAGNOSISSPECIFICATIONSELECTRICAL SPECIFICATIONSIGNITION TIMING
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)
Ignition Timing
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)SECTION Ignition Timing
ENGINE 3,4L / INLINE 6
Base Timing [1][2] 10° ± 2° BTDC at 800 RPM
[1] engine at operating temperature and vacuum hose(s) disconnected
[2] timing can only be checked, no adjustments are possible
Oxygen Sensor Heater Voltage [3][4] 12 V
Oxygen Sensor Heater Amperage 0.5 - 1.3 A
[3] only for engines equipped with 3-wire oxygen sensor
[4] with fuel pump relay bypassed
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.