Ok, just had a shop replace my Head Gaskets, but now I have:

1) No oil pressure (according to gauge)
2) Steam from filler cap
3) Random knocking causing a stumble at idle
4) Low oil

Is this a hosed bottom end?

 

Hmmm- the oil pressure sending unit could have been left unplugged, but the steaming from the cap and knocking is not good. Water may be getting in somewhere it shouldnt....is the exhaust discolored? I'd take it back for sure...
Jeff

 

I haven't checked the exhaust. I didn't notice anything on the highway . . .

I hope it is at least safe to drive back to the shop. . . .