Hollow knocking

[vwscottie]

I`m getting what i can best describe is a hollow knocking sound which i only notice when the engines cold. It only happens when i`m pulling away and only last for about a mile or so, Its starting to annoy me now not knowing what it is.   

[Screech16v]

Does it relate to wheel speed or engine, roughly what area of the car?

[vwscottie]

I`d say it relates to the engine speed and it sounds like its coming from the engine bay 

[johnnyvr6]

knocking normally means the bottom end is on its way out

[vwscottie]

I could under stand that if it was knocking all the time or getting worse.It just started suddenly about 3 weeks ago but it isn`t getting any worse

[Wayne]

Get the oil pressure checked but it sounds like a big end bearing problem.

[trog_nfs]

If there any play in the power steering pump pulley? in my old car i got a knocking sort of noise at idle, and the bearing in the pump had worn and allowing the pulley to move.

[AlexMozza]

Drop the sump and have a look
That was the sound my Celica made when the big ends went

[vwscottie]

I almost certian its not the bearing i`ve had some go on me before and it sounded differant to this knocking 

[philmar]

 Does it smoke when you first start it? It could be Piston slap or small end bearing wear.