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 MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSTIS - SOFTWARE UPDATE 12/96PROPER CARE OF CDSOVERVIEW
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)
Proper Care of CDs: Overview
1987 BMW L7 (E23) L6-3430cc 3.4L SOHC (M30)SECTION Overview
^ Never handle a CD by the top or bottom; only touch the edges.
^ Do not affix paper or tape, and avoid scratching either side of the disc.
^ The disc revolves at high speed within the CD changer, so defective (cracked or badly bent) discs should not be used.
^ Dust and/or finger smudges will have no direct effect on the signal recorded on the disc, but dirt can decrease the amount of light reflected from the recorded surface, thus affecting quality. If the disc should become soiled, gently wipe the surface with a soft lint-free cloth, wiping from the center of the disc to the edge.
^ Do not use record cleaning sprays or anti-static agents. Such volatile chemicals as benzene and thinner can damage the surface of the disc and should not be used.
^ As with traditional audio records, compact discs are made of plastic. To avoid warping, keep the discs in their cases and do not store them in places exposed to direct sunlight.
^ Do not affix paper or tape, and avoid scratching either side of the disc.
^ The disc revolves at high speed within the CD changer, so defective (cracked or badly bent) discs should not be used.
^ Dust and/or finger smudges will have no direct effect on the signal recorded on the disc, but dirt can decrease the amount of light reflected from the recorded surface, thus affecting quality. If the disc should become soiled, gently wipe the surface with a soft lint-free cloth, wiping from the center of the disc to the edge.
^ Do not use record cleaning sprays or anti-static agents. Such volatile chemicals as benzene and thinner can damage the surface of the disc and should not be used.
^ As with traditional audio records, compact discs are made of plastic. To avoid warping, keep the discs in their cases and do not store them in places exposed to direct sunlight.
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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.