Nocking sound when steering left/right

[FrustDriver]

I bought a 2002 Dodge Grand Caravan with 33000 miles on it and it is making a knocking sound when I steer left/right while parked.
I took the vehicle to Dodge and they say it is a normal noise created by air pockets.
I don't agree with the dealer. Any ideas on what I should do next?

Thanks

[Dodgevanman]

That is not a normal noise, there shouldn't be any air pockets in the power steering system. It sounds like you may have a problem with the rack & pinion assembly itself, an inner tie rod end (which screw into the rack), or possibly the brackets that hold the rack assembly in place have come loose.

[Dakaty]

This might also be a bad belt tensioner. Look at the engine and all related components while someone is turning the wheel causing the noise. See if you can spot any tell tell signs.