Rev Noise

1. Jamescl1992 Infrequent Poster Joined: Jun 2010 Wakefield Posts: 233 ZR 2.0 TD Saxo 1.5D

   #1 2nd April 2011, 01:18

   Well its been doing this since i bought it now and its gettin annoying and id just like to know what it is..
   
   whenever i hold the car on a certain amount of revs it makes this weird noise
   It does it when the rev needle is pointing to the mark exactly below 10 & 20 , and if you hold the revs on that mark it wont go off.
   
   Also does it when stationary in neutral with jus foot on pedal, its really loud and irritating
   
   anyone know what this could be ?
   
   Cheers for any answers
2. tathan L-plater Joined: Mar 2011 Wrexham Posts: 74

   #2 2nd April 2011, 01:39

   you win the prize for vaguest description.
   
   
   does it go away when you press the clutch?
3. Jamescl1992 Infrequent Poster Joined: Jun 2010 Wakefield Posts: 233 ZR 2.0 TD Saxo 1.5D

   #3 2nd April 2011, 02:23

   Quote:

   Originally Posted by tathan you win the prize for vaguest description. does it go away when you press the clutch?

   Its hard to explain, It only does it when the needle on the rev counter is on the Exact Mark under the Numbers 10 and 20 whenever the needles goes a tiny bit of that mark it goes off clutch doesnt effect anything it does it either when the clutch is dipped or released, its like a really loud grinding sound..
4. Jamescl1992 Infrequent Poster Joined: Jun 2010 Wakefield Posts: 233 ZR 2.0 TD Saxo 1.5D

   #4 2nd April 2011, 02:28

   
   
   Ive marked the lines on these set of dials they arent mine just as an example..
   Whenever the needles pointing to Dead on either of those 2 marks the noise comes ... and a tiny bit over the mark it goes off. if your in neutral and put ur foot down on the pedal and keep the needle exactly on either of those 2 marks the noise will not stop until you go over/under the mark
   
   Very annoying as going 40mph in 5th the needle is pointing to the 2nd mark and the noise doesnt go off
5. JoshB Saxperience Forum Bum Joined: Dec 2008 Pontefract Posts: 4007 2010 E92 320i MSport

   #5 2nd April 2011, 08:30

   What kind of noise? Where is it coming from? You sure its not just the exhaust banging on the car?
6. Jamescl1992 Infrequent Poster Joined: Jun 2010 Wakefield Posts: 233 ZR 2.0 TD Saxo 1.5D

   #6 2nd April 2011, 13:41

   Quote:

   Originally Posted by JoshB What kind of noise? Where is it coming from? You sure its not just the exhaust banging on the car?

   It sounds like its coming from the rear of the car, the noise is like a really loud grinding/vibration sound
7. JoshB Saxperience Forum Bum Joined: Dec 2008 Pontefract Posts: 4007 2010 E92 320i MSport

   #7 2nd April 2011, 16:24

   If its to do with the revs then its probably the exhaust catching on the car. Jack the rear of the car up and get a mate to rev the engine, see if you can locate the noise. It will either be catching on the heat shielding, or the backbox will be on its way out so the baffles will be rattling inside the box.
8. Jamescl1992 Infrequent Poster Joined: Jun 2010 Wakefield Posts: 233 ZR 2.0 TD Saxo 1.5D

   #8 3rd April 2011, 22:06

   Just uploaded a video to show the noise
   
   
9. Rudpud Saxperience Forum Bum Joined: Aug 2009 Oxford Posts: 4547 '55 Plate C2 VTS

   #9 3rd April 2011, 22:16

   I have something very similar to this, but you cant hear the vibrating outside the car...
   I believe it may be my cat pipe knocking on the mount before the centre pipe. But i also think i have many other rattles too lol.
10. RickVTR Regular Poster Joined: Feb 2011 Leyland, Lancashire Posts: 265 2000 Saxo VTR

    #10 3rd April 2011, 22:17

    sounds like your exhust catching on the bottom of the car
11. Eskimo Saxperience Forum Bum Joined: Sep 2008 Nottingham Posts: 3194 Fabia vRS + Miata

    #11 3rd April 2011, 22:25

    Quote:

    Originally Posted by RickVTR sounds like your exhust catching on the bottom of the car

    + 1 ...
12. danny-vts Saxperience Post Whore Joined: Dec 2010 Chesterfield/Nottingham Posts: 7147 dead vts. twisted 106 gti. '03' vtrrrr

    #12 3rd April 2011, 22:25

    sounds like your exhaust is vibrating on something underneath your car
13. Jamescl1992 Infrequent Poster Joined: Jun 2010 Wakefield Posts: 233 ZR 2.0 TD Saxo 1.5D

    #13 3rd April 2011, 22:32

    Quote:

    Originally Posted by Eskimo + 1 ...

    But why would it only do it when the rev needle is dead on a certain position and not all the time?
14. Jamescl1992 Infrequent Poster Joined: Jun 2010 Wakefield Posts: 233 ZR 2.0 TD Saxo 1.5D

    #14 3rd April 2011, 22:36

    Pic of exhaust
    
    
15. JoshB Saxperience Forum Bum Joined: Dec 2008 Pontefract Posts: 4007 2010 E92 320i MSport

    #15 4th April 2011, 14:32

    Quote:

    Originally Posted by Jamescl1992 But why would it only do it when the rev needle is dead on a certain position and not all the time?

    Resonant frequencies.
    
    Get some new exhaust rubbers.