Just got done with replacing the oil separator and cleaning out the tubes or replacing them. at 250K, it wasn't as bad as I thought. Nothing was completely plugged up, though the lines were gunked and coked pretty bad. We'll see if that solves my oil leak problem, but I'm not hopeful as I already see a few drops under the car...though that could be from all the oil that leaked out already. I did start the car up and let it warm up. I didn't feel any pressure out the dipstick tube, but there wasn't a vacuum there either. Is that normal? BTW, thanks for the tips!