Any Suggestions?

[pips1970]

Hi guys

My 944 on start up sounds like you are shaking spanners in a metal dustbin ??
( terrible knocking noise) As soon as i move off & drive approx 100 yards or gently rev the engine it disapears & she runs sweet, idles fine & pulls with good power.
Northway have recommended a 6k service, which is never a bad thing.

Any suggestions?