Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Bob S on 26 September 2008, 10:04:22

Title: High pitched noise
Post by: Bob S on 26 September 2008, 10:04:22

Hi
Finally got my Omega 2.5 CDX (cam belt and pullies done), drives like a dream, though wondring if any one could help? When the throttle is in no mans land ie just resting foot on accelerator there is a high pitched whistle (not air) it sounds like a dentists drill or two ceramic surfaces rubbing together at high speed. Throttle off no noise throttle open as in accelleration no noise, I know I could turn up the radio but that's like burrying your head in the sand. Tends to be when she's been running for a while too.  Anyone come across this before?
Regards
Bob

Title: Re: High pitched noise
Post by: feeutfo on 26 September 2008, 18:12:02

possible air intake related? Leaking plenum seals or a vac leak possibly. What direction is the noise coming from. Engine bay or cabin?

Title: Re: High pitched noise
Post by: Bob S on 27 September 2008, 13:39:46

HI and thanks for the response.
Noise is external with window wound down, appears rear engine/gearbox area can't detect with bonnet up and engine running.
Noise is like two surfaces rubbing together, though only in this no man's land throttle position. Would expect if air leak to increase with speed of engine? Wondering if it could be gearbox?

Title: Re: High pitched noise
Post by: feeutfo on 27 September 2008, 17:40:14

prop shaft to diff bearings? Exhaust on the way out? Loose heat shield. Noises always difficult  tbh

Title: Re: High pitched noise
Post by: Andyb on 27 September 2008, 21:47:39

loose drive belt m8

Title: Re: High pitched noise
Post by: Bob S on 28 September 2008, 19:39:55

Just come in lifted bonnet  surroundings quiet looks as though noise is comming from rear of engine, whislte goes on tick over and when throttle opens. Too dark to see fully there appears to be a lot of tube down there and when I move one component whistle gets louder then dies. It sound exactly like what I am hearing. Will persue in the day light tomorrow.
Thanks for all the pointers.

Title: Re: High pitched noise
Post by: feeutfo on 28 September 2008, 19:59:47

a pound on a vac pipe then.