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			If its the external hoses - probably not costly of you can do the work yourself. Replace parts and refill the system with coolant, which can be a pain.   
 
If its the heater core, then it could be really expensive if you have to take out the dash to get to the core or its hoses. There may be a back door way to avoid disassembling the dash. Look for some threads where people to reseal re-foam the control flaps without removing the dash unit. These threads usually mention black pieces coming out the vents
		 
		
		
		
		
		
		
			
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				'87 951 
'01S 986 (Sold after 16 years ownership) 
'78 924 (carburated; sold when moving to CA)
			 
		
		
		
		
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