Exhaust blowing noise coming when starting in the morning?

[vasi1982]

Hi All,

I have got Mk3 Golf driver 1.8 1995 M reg,

The problem is, when ever i start the car in the morning i can hear exhaust blowing sound coming from front of the engine, after i start to drive for long time its goes away, i can not work it out why is that happing or where is happing.

If someone haver same problem please let me know, how can i sort it out.

Thank you

Vasi

[SammoVWT]

Might be a slight crack in the exhaust manifold, worth checking out, when metal heats it expands, so it may be a small crack when cold and 'dissapear' when warm.

[steve1976]

Is it common to get a crack in the manifold or downpipe?

[SammoVWT]

as common as it is to drive over a larger puddle at speed with a nice hot exhaust on an ageing piece of metal

Rapid cooling and expansion will cause a crack to occur, especially if the metal is old and has a couple of mm of oxidisation, sure i can see that happening, definately not unheard of!