I had previously replaced the oil separator/CCV without removing the intake manifold and it was very difficult. IIRC, I unbolted and set aside the PS fluid reservoir and removed the alternator as well to replace the CCV. I don't remember if I unbolted the electrical harness box at that time--probably I did. The next time I have to replace the CCV, I'll first try it without removing the intake manifold, but will definitely move electrical box, remove the purge valve, and possibly remove the whole oil filter housing too.It almost looks like if you get thru steps 2, 3 and 4 (moving the whole harness rearward and out) you can pretty clearly see and access the oil separator - yes?
I only found one fuel line by the firewall, connecting from a fuel line (from fuel filter) to the fuel injection rail. It has two quick disconnects, one on each end. Not sure where is this 2nd fuel line. There is a purge line from the purge valve to the charcoal canister and a small vacuum line from the F-connector (goes into top of air intake boot) towards the back of the car and not sure where that goes--maybe it goes to the fuel filter as well (which has 3 ports and an internal FPR)?Just removed my intake manifold on a 2000 323i. It took a total of 8 hours, but that was due to problems I encountered removing hoses. Especially the hoses at the firewall because of the small space. I pulled it off to replace the two coolant pipes that sit just under the intake manifold. Now that it's off, I am able to replace several small hoses that were falling apart and brittle. Here are some pics of the two pipes and how badly brittle they were. <snip>
The only problem I really encountered was when I thought all the bolts and hoses and wires were unplugged. The two fuel lined by the firewall are hell to remove (only by feel). Once off there is so much room to replace all the hoses and potential issues underneath.. It's not an impossible job (I'm not a mechanic, I'm a nurse) and I was able to do it. But I will say it is tedious and definitely requires patience. Good luck and let me know if anyone has questions as I wish I had help when I needed it.