Whistling, windy noise from under the car.

[KyL3]

I seem to be getting a whistley, windy noise coming from under my car when i hit around 40mph. Can hear it more so now its colder and windier. Had my exhaust sleeved and welded by Fred@BTM at the beginning of the year so surely it cant be that? Any ideas?

 

[chaski]

Could be blowing from elsewhere along the exhaust. A small crack can make a lot of noise.

 

[KyL3]

Could be blowing from elsewhere along the exhaust. A small crack can make a lot of noise.

I did think this 2bh mate! Ive got my MOT coming up real soon think i will get them to take a look whilst its there

 

[KyL3]

Still making the noise. Went in for MOT no blowing coming from exhaust at all they reckon.

 

[MicKPM]

Most common cause for this is the CAT to Manifold seal kit blowing due to wear or bolts no longer asserting adequate pressure or a worn fire ring. Look carefully at the joint for signs of black soot like stuff at the joint.

 

[KyL3]

Most common cause for this is the CAT to Manifold seal kit blowing due to wear or bolts no longer asserting adequate pressure or a worn fire ring. Look carefully at the joint for signs of black soot like stuff at the joint.

Had a new one of these when Fred welded the olive joint. Seemed to have disappeared for a while now the weather is worse really is noticeable again?