I have a 89 Honda Civic Wagovan with a stock d15b2. I have plans for the future. In the meantime i have to get around with this crappy motor. Quick question. Anybody know what this is?

 

That is your PCV (positive crankcase ventilation) hose. It looks cracked and caked with gunk. You should probably replace it. It should connect to the PCV valve, which is missing from the threaded hole by the #3 runner on the intake manifold. You will need one of those as well.

 

What is the part number for the hose? Or can I use any hose?

 

part no. 11856-PM5-000 but it has been discontinued

 

thank you