Oil cooler lines, rust

["Louis A. Mulieri" <lmulieri@zoo.uvm.edu>]

	Dorab's post reminded me that one of my oil cooler lines, too, is 
rusty. My mechanic, great guy, recommends changing to prevent 
catastrophic failure.  I plan to keep my car, 1988 5ktqcs, for at least 
another ten years and it seems that the most efficient, if not cash-flow 
friendly, choice would be to replace the entire system while it is down.  
That is both lines and the cooler.  Since the cooler is Al and the lines 
some other 
steel alloy he says there is danger that the line may not disconnect 
without breaking the connector.  Has anyone had experience with failure 
of this system?  TIA
Berthann, using husband's email
1988 5ktqcs, pearl white and beautiful