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Old 19th February 2009, 11:30   #1
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Default Rattling at idling - Baleno

Vehicle: Baleno 2004 (Euro 2)

Problem:
  • A rattling sound is heard at idling. A hard edged, metallic sound, sounds like a fan is touching something.
  • Sound decreases after driving 10km or so.
  • Car has covered just 18000 km, is serviced regularly.
  • Performance is otherwise perfect, super-smooth when the engine ie revved, great pick-up and FE.
  • I showed it to a MASS centre, problem is by the time i reached there, the sound had decreased. The advisor said it is the sound of the tappets, and is normal.


1. Any idea as to the what the problem can be?
2. Can anyone recommend a reliable mechanic in Mumbai, preferably close to Vile Parle?
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Old 19th February 2009, 12:28   #2
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if its tappets then get them adjusted they might be loose. a normal ocurrence.
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Old 19th February 2009, 13:48   #3
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thanks for the reply iceman

can anyone suggest a reliable mechanic in Mumbai, western suburbs?
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Old 20th February 2009, 12:58   #4
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Guys, some more details that i noticed yesterday..

the rattling is loud when car idles, at abt 700RPM (a little less than 750 rpm on the meter). However, if i nudge the accl. pedal slightly, and bring the rpm up to 750 RPM, then it vanishes..

If this is tappet noise, why does it stop with such a slight increase in RPM?
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Old 20th February 2009, 23:11   #5
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I've never heard car tappets so loud that you can hear them inside the drivers cabin. And that too a Baleno!! Please check with anything that could be loose. It could also be a metal clip thats loose. And the reason why at idle it may sound a lot more is that at idle setting, engines vibrate a lot more than they do once at higher rpm. As for you saying that the rattling dies down with time even at low rpm is because once your engine reaches optimum temperature, it vibrates a lot less than it does at idle when its cold. So before you go around fiddling with tappets and anything like that, try and narrow down to the point where the noise is coming from. Then get someone to help you with locating the noise. Get your help to gently rev the car with pauses while you try and locate the familiar sound by getting under the hood. Get a peice of cloth and try and dab the areas that you feel may have something loose. I'm sure you'll locate it.

Quote:
Originally Posted by silver baleno View Post
Guys, some more details that i noticed yesterday..

the rattling is loud when car idles, at abt 700RPM (a little less than 750 rpm on the meter). However, if i nudge the accl. pedal slightly, and bring the rpm up to 750 RPM, then it vanishes..

If this is tappet noise, why does it stop with such a slight increase in RPM?
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Old 20th February 2009, 23:21   #6
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Ask the mechanic to remove your exhaust pipe and do an idling test.

I had a similar porb in my car which was due to a loose part in the exhaust pipe. It used to come at a specific rpm and then vanish.

Tappet sound can't be that loud. Iv got the tappets on my car tuned for performance and while they are loud on the outside, i can't hear anything when im in the driver's seat.

Shan2nu
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Old 21st February 2009, 08:08   #7
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I agree with Shantanu
Have your friend start the car while you listen outside to track down the rattler. definitely not the tappets in any case. Let us know what happens.
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Old 21st February 2009, 14:27   #8
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Just logged in today, and was surprised to see so many responses! Thanks for the advice guys, will do what kapiljolly79 suggested, and see if the noise can be pin-pointed.
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Old 22nd February 2009, 16:11   #9
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tappet can be ruled out as car has run only 18k. Chances are one in million.

Check
1. various mounting.
2. Gear linkages and related bushes.
3. various clip. and harness that hold cable fuel lines etc.
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