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 DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSSERVICE AND REPAIREXHAUST SYSTEM
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)
Exhaust System
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)SECTION Exhaust System
The exhaust system must be inspected and tightened at every oil change interval. The catalytic converter can be checked by "shaking" the exhaust system and listening for loose or broken converter parts. Any leaks in the system will influence the exhaust emissions.
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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.