Exhaust - Resonance Noise

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Classification: Section:
EF/EC 92-001 Engine Fuel &
Emission Control

Reference:
TECHNICAL BULLETIN ITB92-002


Models:
1990 & 1991 M30

Date:
JANUARY 10, 1992


ENGINE EXHAUST RESONANCE NOISE


APPLIED MODEL: ALL 1990 M30 (F31)

1991 M30 Coupe (F31), until August 23, 1990 production

APPLIED VIN: JNKHF14C*MT020063


SERVICE INFORMATION:


Some customers may complain of a loud exhaust resonance noise at high engine R.P.M.s. It has been determined that the noise is emitted from the muffler. A countermeasure muffler has been developed with an inner structure modified to reduce the resonance noise. Additionally, during production an improved process was incorporated to reduce the possibility of the black paint on the rear face of the muffler from peeling.

PARTS INFORMATION:


DESCRIPITION PART NUMBER

Muffler 20100-F6602

WARRANTY INFORMATION:

OPERATION OP CODE CS PNC CT FLAT RATE


Rpl Rear Exhaust Tube & Muffler FD34AA 4R 20100 31 0.5 hrs.