chadz34 Posted November 14, 2007 Report Share Posted November 14, 2007 EXHAUST RATTLE/RINGING NOISE 3.4L V6 ENGINE (INFORMATIONAL) #93-6F-103 - (Mar 17, 1992) SUBJECT: EXHAUST RATTLE/RINGING NOISE (REPLACE MUFFLER ASSEMBLIES AND EXHAUST INTERMEDIATE PIPE) VEHICLES AFFECTED: 1991-92 "W" MODELS WITH 3.4L ENGINE (VIN X, RPO LQ1) CONDITION: --------- Some 1991-92 W-cars with 3.4L V-6 engines (RPO LQ1), may exhibit an audible metallic rattle/ringing type noise that appears to be coming from the rear underbody area of the vehicle, evident during vehicle warm-up after cold start. CAUSE: ----- Combination of the engine fuel/air ratio prior to reaching normal operating temperature and unequal length exhaust takedown pipes, generate exhaust pulses that create a resonance in the exhaust system. CORRECTION: ---------- Replace existing exhaust intermediate pipe, right and left hand muffler assemblies with new components indicated below by vehicle configuration. NOTICE: Owners should be informed prior to servicing vehicle, that the amplitude of the sporty/throaty exhaust note of the system will be appreciably reduced with installation of these new components. Knowing this, some owners may wish to forego the servicing of their vehicle for correction of the rattle/ringing noise apparent only during vehicle warm up. So, there are replacement mufflers that reduce the rasp? It won't hurt the car fo course....I dont see why people see that sound as a problem? Quote Link to comment Share on other sites More sharing options...
Regal_GS_1989 Posted November 14, 2007 Report Share Posted November 14, 2007 Hrmmm... Time for new exhaust on the cutlass perhaps Quote Link to comment Share on other sites More sharing options...
chadz34 Posted November 14, 2007 Author Report Share Posted November 14, 2007 Hrmmm... Time for new exhaust on the cutlass perhaps LOL and my 92' Z34. I actually thought it was normal....I had no clue they could fix it! Hell even performance mufflers dont fix it haha Quote Link to comment Share on other sites More sharing options...
White93z34 Posted November 15, 2007 Report Share Posted November 15, 2007 now that you mention it my euro's exhaust seems to rattle a hell of a lot, but i figured it was because the car was old. Quote Link to comment Share on other sites More sharing options...
5speedz34 Posted November 15, 2007 Report Share Posted November 15, 2007 This looks more like a TSB to me than a recall. Quote Link to comment Share on other sites More sharing options...
Psych0matt Posted November 15, 2007 Report Share Posted November 15, 2007 well it doesn't matter, its too old anyways my catalytic converter ratttled from about 1500 to 2500 rpms for the first three years I had it, and then finally had it replaced Quote Link to comment Share on other sites More sharing options...
5speedz34 Posted November 15, 2007 Report Share Posted November 15, 2007 well it doesn't matter, its too old anyways my catalytic converter ratttled from about 1500 to 2500 rpms for the first three years I had it, and then finally had it replaced Shit man, the exhaust on 3.4's are raspy as is from the factory. Like I said I think this is just a TSB, GM wouldn't replace exhaust unless it was a safety issue. ie-to close to gas tanks, etc. Quote Link to comment Share on other sites More sharing options...
Psych0matt Posted November 15, 2007 Report Share Posted November 15, 2007 good point Quote Link to comment Share on other sites More sharing options...
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