I removed the PCV valve on my 01 5.9L and now the new one is the wrong part and I cannot get the old one back on. It just wont go. I need the truck for tomorrow. HELP!!!!! I thinkI removedthe PCV valve,its on the passenger side valve cover to the rear of the motor.

 

All resolved

 

Ya, good to see you figured it out.

Sometimes a little lubrication can get those parts in!