<E30> Part number request

["Mike Theuri" <mikesoft@xxxxxxxxxxxxxx>]

I am looking for the part number of the black pipe that runs
from the transparent coolant reservoir to the radiator. I 
believe this should be the coolant overflow pipe. This is for
an '86 325. I believe I can make a replacement, but is it 
advisable to have a mechanic do it ? I ask that, if a mech's 
expertise is required to avoid leaks or would it be a simple
DIY job. Thanks 

Mike Theuri
'86 325 166K 

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