New Fiesta 1.6S friction-like noise at around 1200rpm

abhipuru16 · 14th December 2010, 22:27

Guys
Just today, after reaching back home and having a listen to my ICE system, I noticed this strange noise that came when I revved the engine. The noise comes continuously between 1000 to 1250rpm and then everything is smooth.
No matter how I rev it, it is this band where the noise comes. There is no noise when there is no throttle input (900rpm) it is felt and hear just between 1000 to 1250rpm after which it is butter smooth.

And even when I rev the engine to say 4000rpm and lift off the throttle, as and when the rpm comes down and reaches this band, the noise is heard just the same way, no perceptible change in loudness or anything.

If I keep the revs exactly in this band, the noise is there continuously.

The noise is almost like some kind of "resistance" or "friction" from somewhere inside the bonnet but that is highly unlikely as the car has just completed 5000Km and the first service was done a fortnight ago due to which there is a tremendous increase in fuel efficiency.

It sounds like "grrrrrr" and I can even feel it through my feet.

I am losing my sleep over it, please help me guys.

Best of regards

sureshkishore · 15th December 2010, 06:10

From my limited knowledge, some degree of vibration is normal for a 4 cyl car engine.(6 cyl configuration is said to be most balanced) It becomes perceptible usually in no load condition (revving in neutral)
I have noticed the same in my SX4 as well.

If you are worried check another Fiesta 1.6, so that your doubts are cleared.

ghodlur · 15th December 2010, 07:41

Better show it to the service centre. You dont want something to be causing friction for long which may result in some damage.

I hope you would be able to recreate the same conditions to show the advisor the issue.

kiku007 · 15th December 2010, 08:39

Let me break it down further,

1. It sounds similar to belt noise
2. When the car revs down, you hear this noise typically at 1200 rpmish?
3. Open the bonnet, ask someone to rev the engine in this rev range and try to source the noise from the engine bay. It's from say, bang in front of the driver's side.

If it's all the above, then welcome.

I also faced/face the same issue. First they changed the coolant saying they have to use level2 coolant (I don't believe); didn't fix. Then they changed the water pump;temporarily, partially fixed. Now it's back in it's full form. Have to take my car back to the workshop when I have time.

Will keep you posted. Meanwhile why don't you raise this issue through the customer care?

abhipuru16 · 15th December 2010, 12:57

Quote:

Originally Posted by kiku007

Let me break it down further,

1. It sounds similar to belt noise
2. When the car revs down, you hear this noise typically at 1200 rpmish? See, let's put it this way- I hear it from 1000 to 1250rpm and 1250 to 1000rpm. Within this 250rpm there is no change in tone or loudness, it is a "one note" noise in this band of rpm.
3. Open the bonnet, ask someone to rev the engine in this rev range and try to source the noise from the engine bay. It's from say, bang in front of the driver's side. Will try it today.

If it's all the above, then welcome.

I also faced/face the same issue. First they changed the coolant saying they have to use level2 coolant (I don't believe); didn't fix. Then they changed the water pump;temporarily, partially fixed. Now it's back in it's full form. Have to take my car back to the workshop when I have time.

Will keep you posted. Meanwhile why don't you raise this issue through the customer care?

Which car do you own?

kiku007 · 15th December 2010, 19:13

Quote:

Originally Posted by abhipuru16

Which car do you own?

It's a 2009 Dec Fiesta 1.6.

amit_mechengg · 15th December 2010, 19:32

is it the hissing sound when you listen to the music only? what happens in the same rpm when music system is switched off? i was thinking about alternator whine.

abhipuru16 · 16th December 2010, 16:11

No No, it is not alternator whine.
This "rubbing-grinding" noise is definitely from somewhere under the hood as I could make out after listening to it carefully yesterday.

abhipuru16 · 18th December 2010, 01:43

Today, the car came back home in the evening after a long drive spanning 70Km. Just before reaching home, it was tanked up to the brim.

Now, as soon as it came home I checked for that same vibration but surprisingly, there was no vibration this time around! It was just like new, smooth and cream-like revving

What do I make of this? Good Fuel? Optimum Engine Temperature i.e., a nicely warmed up Engine?

14th December 2010, 22:27	#1
abhipuru16 BHPian Join Date: Dec 2009 Location: Faridabad Posts: 719 Thanked: 40 Times	New Fiesta 1.6S friction-like noise at around 1200rpm Guys Just today, after reaching back home and having a listen to my ICE system, I noticed this strange noise that came when I revved the engine. The noise comes continuously between 1000 to 1250rpm and then everything is smooth. No matter how I rev it, it is this band where the noise comes. There is no noise when there is no throttle input (900rpm) it is felt and hear just between 1000 to 1250rpm after which it is butter smooth. And even when I rev the engine to say 4000rpm and lift off the throttle, as and when the rpm comes down and reaches this band, the noise is heard just the same way, no perceptible change in loudness or anything. If I keep the revs exactly in this band, the noise is there continuously. The noise is almost like some kind of "resistance" or "friction" from somewhere inside the bonnet but that is highly unlikely as the car has just completed 5000Km and the first service was done a fortnight ago due to which there is a tremendous increase in fuel efficiency. It sounds like "grrrrrr" and I can even feel it through my feet. I am losing my sleep over it, please help me guys. Best of regards Last edited by abhipuru16 : 14th December 2010 at 22:42.
	() Thanks

15th December 2010, 06:10	#2
sureshkishore BHPian Join Date: Nov 2007 Location: trivandrum Posts: 478 Thanked: 290 Times	Re: New Fiesta 1.6S friction-like noise at around 1200rpm From my limited knowledge, some degree of vibration is normal for a 4 cyl car engine.(6 cyl configuration is said to be most balanced) It becomes perceptible usually in no load condition (revving in neutral) I have noticed the same in my SX4 as well. If you are worried check another Fiesta 1.6, so that your doubts are cleared.
	() Thanks

15th December 2010, 07:41	#3
ghodlur Senior - BHPian Join Date: Sep 2009 Location: Thane Posts: 6,010 Thanked: 4,199 Times View My Garage	Re: New Fiesta 1.6S friction-like noise at around 1200rpm Better show it to the service centre. You dont want something to be causing friction for long which may result in some damage. I hope you would be able to recreate the same conditions to show the advisor the issue.
	() Thanks

15th December 2010, 08:39	#4
kiku007 Distinguished - BHPian Join Date: Apr 2005 Location: AU Posts: 2,322 Thanked: 7,192 Times	Re: New Fiesta 1.6S friction-like noise at around 1200rpm Let me break it down further, 1. It sounds similar to belt noise 2. When the car revs down, you hear this noise typically at 1200 rpmish? 3. Open the bonnet, ask someone to rev the engine in this rev range and try to source the noise from the engine bay. It's from say, bang in front of the driver's side. If it's all the above, then welcome. I also faced/face the same issue. First they changed the coolant saying they have to use level2 coolant (I don't believe); didn't fix. Then they changed the water pump;temporarily, partially fixed. Now it's back in it's full form. Have to take my car back to the workshop when I have time. Will keep you posted. Meanwhile why don't you raise this issue through the customer care?
	() Thanks

15th December 2010, 19:32	#7
amit_mechengg Senior - BHPian Join Date: Dec 2007 Location: Pune Posts: 2,488 Thanked: 2,251 Times View My Garage	Re: New Fiesta 1.6S friction-like noise at around 1200rpm is it the hissing sound when you listen to the music only? what happens in the same rpm when music system is switched off? i was thinking about alternator whine.
	() Thanks

16th December 2010, 16:11	#8
abhipuru16 BHPian Join Date: Dec 2009 Location: Faridabad Posts: 719 Thanked: 40 Times	Re: New Fiesta 1.6S friction-like noise at around 1200rpm No No, it is not alternator whine. This "rubbing-grinding" noise is definitely from somewhere under the hood as I could make out after listening to it carefully yesterday.
	() Thanks

18th December 2010, 01:43	#9
abhipuru16 BHPian Join Date: Dec 2009 Location: Faridabad Posts: 719 Thanked: 40 Times	Re: New Fiesta 1.6S friction-like noise at around 1200rpm Today, the car came back home in the evening after a long drive spanning 70Km. Just before reaching home, it was tanked up to the brim. Now, as soon as it came home I checked for that same vibration but surprisingly, there was no vibration this time around! It was just like new, smooth and cream-like revving What do I make of this? Good Fuel? Optimum Engine Temperature i.e., a nicely warmed up Engine?
	() Thanks