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1992 Honda Civic Rattle in Low Gears

1992 ALL OTHER MAKES ALL OTHER MODELS
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SNOWHOBO
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  • 2 POSTS
My 1992 Civic DX has 125,000 miles. Lately it has been producing a rattling noise, most noticalbly in low gears and in reverse. The sound seems to come from the lower engine compartment. There's a metal box near the undercarriage which seems to create or amplify the noise. Any suggestions?
Jun 8, 2006 at 3:30 AM
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BRUCE HUNT
  • ✓Experienced Mechanic
  • 3,754 POSTS
What is the metal box? Have you had any exhaust work done lately? OR need some done? Sure it is not any of the heat shields on the exhaust?
Jun 20, 2006 at 12:46 AM
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SNOWHOBO
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Recently, the exhaust was replaced from front to back. I have found out that my radiator is on the verge of needing replacement. Could that be it?
Jun 20, 2006 at 7:30 AM
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BRUCE HUNT
  • ✓Experienced Mechanic
  • 3,754 POSTS
I doubt that. I suspect that the exhaust heat shield is vibrating. Especially given the new exhaust sytem. They are sensitive and will vibrate at low speeds or idle. Put the car up on ramps and with it running, inspect the exhaust system.
Jun 20, 2006 at 8:35 AM
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Suggested Repair

Inspect the exhaust heat shields with the car safely on ramps and the engine running. A loose or vibrating heat shield after the recent exhaust replacement is the likely cause; the radiator is unlikely to cause this rattle.

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Conversation Summary

The owner of a 1992 Civic DX with 125,000 miles reports a rattle in low gears and reverse that seems to come from the lower engine area near a metal box under the car. The exhaust was recently replaced front to back, and the radiator may soon need replacement. The expert doubts the radiator and suspects a vibrating exhaust heat shield, recommending inspection of the exhaust system on ramps with the engine running.

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