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Does it push out of the steering reservoir when turning the wheel?
No only when we filled it and bled it then shut it off. Now it is quiet and doesnt leak except air out the the cracked res when we shut thew car off
First thing is this
Is the system a sealed system? Could air being introdeced wwhile running cause the overflow and poor steering after a time?
On the reservoir make sure your not over filled, and that the fluid level when warm is at the MAX level and no over. Cause if it's over it will come out the top when turned off
We are at that., But with the cracked top of the res, will the air being introduced cause it to push fluid out?
Do you see the fluid circulating in the reservoir when the car is running?
Then you may have a problem with the power steering rack
The circulation means the pump is working, but the rack can cause the over flowing problem and also allow air in to the system as well
The air seems to come from the cracked resivoir.Because when the car is shut off, air pushes out of the top of the res, not the cap but around the top edge of the res. If this does not cause the overflow, you are suggesting the rack, correct?
It's going to be caused by one of two things
The pump or the rack
The pumps are very rare, and since you see the fluid circulating , I would lean towards the rack.
Racks are more common than pumps.