Question about 2009 Mazda MAZDA5

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What could be causing rattling under the hood when sitting still?

When sitting still or stopping at a red light there is a slight rattling/tapping sound under the hood. I am thinking maybe one of the plastic pieces under the hood may be loose? It only seems to happen when holding the brake to stop the car from moving. I don't think it's related to the brakes themselves as I just had both the brakes and rotors changed. Other than that the car runs/drives fine and has regular oil changes and maintenance. Any suggestions, thoughts, or ideas on what I may want to check would be appreciated.

Posted by Anonymous on

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Many things can cause your problem but the most common is either a heat shield or a retaining clip that has come loose. My recommendation is to block your wheels so that your vehicle can't roll forward, open your hood, start your vehicle, HOLD YOUR FOOT ON THE BRAKE PEDAL, have an assistant listen to see if they can locate the noise. If the noise is gone with the hood open then look for any shiny spots on the underside of the hood.

Posted on Apr 13, 2014

  • Anonymous Apr 13, 2014

    Hi Steve, thanks for the suggestions and advice. I'll try this out later today and will reply back if I have any additional questions.

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It could be ideal tick over is to low or it could be worn engine mounts

Posted on Apr 15, 2014

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Maybe hydraulic lifters

Posted on Apr 13, 2014

  • Anonymous Apr 13, 2014

    Hey Frank, are there any things I should be looking for that would help me decide if it's the hydraulic lifters as you've suggested?

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 1779 Answers

SOURCE: rattling noise coming from front & back

Matt, sounds like a suspension or exhaust noise. Grab onto exhaust (engine cold) at several locations (car supported securely so u don't get crushed) and wiggle, tug pull, kick, etc to see if u can get it to make any noise from hitting anything. Look for evidence of the exhaust rubbing against something, by looking for shiny metal due to contact w/ something. Also push up and down on the body of the car as violently as possible to simulate going over bumps. Pay close attention to heat shields around or on the exhaust system, if they are loose, they will make a racket.
And, as I said, possibly the suspension is making the noise, but not as likely, pushing up and down on the car body as described above might reproduce the noise. If it isn't the exhaust (my 1st choice), give me more clues if u can. good luck countrycurt0

Posted on Oct 11, 2008

goalie39
  • 469 Answers

SOURCE: check engine light on; ABS/Parking Brake light on - 02' Protege 5

If you live in the US, you can take your car to an Auto Zone store and they will read off the diagnostic code that is causing the check engine lamp to come on. Once you have that then you can decide your next course of action.

Hope this is of some help.
Ed

Posted on May 14, 2009

  • 54 Answers

SOURCE: intermittent braking problem

yeah you mostlikey have a abs pressure switch problem. which helps in the power assist , and or the seal in the brake booster is going bad

Posted on May 27, 2009

  • 236 Answers

SOURCE: Engine suddenly revs when stopped & @ idling

sounds like one of the metal arms connected to the engine may be getting stuck some how. have someone get in car and press on gas when car is off while you watch engine to see what is moving, then check those arms to see if there is any possible obstructions or knicks or something on them

Posted on Jun 17, 2009

alicantecoli
  • 22219 Answers

SOURCE: Car is shaking when sitting in drive at stop

should be 95 octane try that first ,because it will cause pre detonation which could be the problem

Posted on Jul 09, 2009

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