2002 - 2004 Corvette: Service Bulletin: Jingling Noise On Deceleration or Coast Down (Section and Replace Intermediate Exhaust)
Service Bulletin #: 04-06-05-006
Subject: Jingling Noise On Deceleration or Coast Down (Section and Replace Intermediate Exhaust)
Model(s): 2002 - 2004 Chevrolet Corvette
Some customers may comment on an undesirable "jingle" or "jingling" type of noise when decelerating. The noise is similar to shaking a key ring. This condition is most prominent at the mid- to high-rpm range. This noise may also be noticed when driving next to a cement wall or other barrier that will deflect sound.
This noise is coming from the "H" pipe area of the exhaust system. The center part of the "H" is formed by a crossover pipe connecting the left and right exhaust pipes. At this point, turbulence builds up in the exhaust system and may produce a jingle noise.
A service section of the exhaust has been released that incorporates a revised crossover pipe. You will need to cut the original exhaust behind the catalytic converters as described in the procedure below.
10345549 Gasket, Exhaust --Rear flange 2
10276792 Clamp, 2 1/2" Exhaust 2
10352196 Pipe, Intermediate (Service Section) 1
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