I noticed a few drops of antifreeze on the lower engine pan and found that antifreeze is 'weeping' from the black cap on the part located inline on the lower rad hose.
Since I have spent the past 20 years or so wrenching on American 60 & 70's classics, a lot of things I see under the hood on the xfire are 'foreign' to me so hopefully someone can tell me what this part is called and what it actually does (if anything)?
I tried searching 'little thingie with a black cap under the hood' but no luck and I have scoured the manual and still can't find it.
Hopefully the picture might help identifying it.
Any help is greatly appreciated.
Steve