Bigpete:
The crank vent tube assembly is two tubes with a center connector. The tubes are rubber/rubber-like and get hard as a rock over time. Also, the assembly is very hard to get to - I replaced mine when I replaced the head gasket and was still difficult. I got new ones from the dealer (I don't think there is any choice here - special order) and it took two visits because the dealer's schematic/drawing of parts that included the tube assmebly was incorrect - it didn't show two pieces and I first though my old one had previously broken and be repaired with a connector. I have the part numbers if you need them.
Cary