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Owl Hooting Noise When Accellerating Help!


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#1 gwengo

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Posted 02 August 2013 - 09:47 PM

Hi Guys,

 

I have a problem with my 2002 1.8 TDCi that is both very annoying and very embarrising at the same time. With a cold engine, it runs fine, no unusual noises and idles and revs correctly. Once I have been driving for approximately 20mins and the engine has reached running temperature, the car develops a very unusual sound when I'm accellerating and my revs reach around the 2000 mark. It sounds like what I can only describe as an elongated owl hoot (sounds stupid I know). Even when I lift my foot off the accellerator and the revs drop, it's still present and the dies down the lower the revs get.

 

Trying to cruise along in this nice hot weather, shades on windows down, stop at traffic lights, pretty girls walk by :wub: , accellerate off and my car does that :o :unsure:. zero cool points for me!!!!

 

I hope it's not, but I think it may be something to do with the turbo. If it is, then this car is gonna be scrapped as I really can't afford anymore repairs on this car, especially not a new turbo anyway.

 

Has anyone else experienced this noise. Any advice/guidence will be much appreciated!!



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#2 Stoney871

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Posted 02 August 2013 - 10:01 PM

Have you had your wheel bearings looked at?

Sometimes they can make that noise.



#3 alexp999

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Posted 02 August 2013 - 10:23 PM

When was the air filter last changed?

My mums card did something similar when it was in need of changing, also if it has got wet it can make funky noises too.

Does it make the noise just revving the engine or only when moving?

#4 WinDrop

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Posted 02 August 2013 - 10:25 PM

Have you had your wheel bearings looked at?

Sometimes they can make that noise.

Agree, I had the same problem on my car.

It was making any sound if speed was lower then 30mph

As soon as it was getting higher it was making terrible noise. Same as you described. 

When you hear that sound try to make some sharp turns to the left or right. If sound disapears when you turn the steering wheel then they are definitely the wheel bearings.

 

You can also heat up the engine up to the normal temperature and then stop somewhere at the car park. Put it into neutral and then accelerate so revs go up to 2000-3000

If the engine does not make the same noise then it has nothing to do with the engine itself, It's most definitely the bearings. just need to find which ones ;)



#5 IINexusII

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Posted 02 August 2013 - 10:47 PM

sounds like a split pipe



#6 gwengo

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Posted 03 August 2013 - 06:21 AM

Thanks for the replies guys, I don't think it's the wheel bearings as it happens when the car is stationary and I rev the engine. It does seem to be louder when the car is in lower gears and when it reach 4th or 5th it seems to disappear.

@alexp999: I have had the air filter out and given it a brush off. The car was serviced about 3 months ago, where I would presume they changed the air filter, but it did look rather dirty so I'm starting to question if it was changed in the last service. Might just change it anyway to see if that does the trick.

I have had the intercooler off and checked the pipes around the engine bay and they all seem ok.

Think I might try and record the sound, as it will give you a better idea of what it sounds like rather than my dodgy description :)

#7 Gerhardva

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Posted 03 August 2013 - 09:29 AM

Oil filter housing.



#8 stooge75

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Posted 03 August 2013 - 11:52 AM

i'll go for vacuum or air leak.



#9 gwengo

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Posted 03 August 2013 - 04:27 PM

@Gerhardva: Funily enough, I only started hearing the noise after my last service at "Kwik !Removed!" I wonder if they've fooked something up?

 

@stooge75: Sorry to sound like a noob, but where would I look for the vacuum or air leek?



#10 mintalkin

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Posted 03 August 2013 - 07:10 PM

turbo bearings,was the correct oil grade put in at the service?



#11 gwengo

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Posted 03 August 2013 - 08:15 PM

God knows mate, If I find out that they've fooked up my car, I'm taking KF to court. !Removed! Cowboys!!!!!

 

Is that a guess about the turbo bearings? Is there anything that I can inspect for myself to prove your theory?



#12 stooge75

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Posted 03 August 2013 - 08:24 PM

Possible Manifold leak maybe?
Still say its air leak-split or hole in a pipe.If u open bonnet & rev engine do you hear it?
They wouldnt put anything but 5/30 in it & its no difference if its full or semi synthetic.
One more thing,is air box screwed down properly?

#13 gwengo

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Posted 03 August 2013 - 08:39 PM

Yeah mate, once the engine is at temperature and I lift the bonnet and give it a rev, then noise is there. I did check the air box and it's all screwed down correctly. Though I must admit I haven't yet removed and checked the pipe that leads to the turbo. Might have to do that tomorrow if the dry weather holds out long enough.

 

Thanks for your opinion Stooge I really hope that it is just as simple as replacing a pipe :)



#14 stooge75

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Posted 03 August 2013 - 08:48 PM

Ive got a similar noise but just audible & no more,wi bonnet open. 10 mins ago i just found a teeny weeny split/hole just before jubilee clip on turbo air pipe,but too dark to do anything tho.
I had my inlet manifold off a while back & torque the bolts up wrong(idiot). Im wondering if its maybe slight leak from either of above.if it was inlet manifold tho id expect soot at outside edge. Mmmm. Roll on tomorrow

#15 Gerhardva

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Posted 04 August 2013 - 06:44 AM

When you hear the noise again, pull out the dipstick a tad, if it stops, its the oil filter houising.



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