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			I had the same problem and had to replace the PS pump as a plastic part which is an integral part of the pump had melted 
 
Here is what I did 
1) Replace the Pentosin PS fluid with Redline (it has a higher boiling point and is less likely to create bubbles) 
2) underdrive pulley 
3) I installed a PS cooler (I think it was from LN Engineering) which was a major pain in the neck to install
		 
		
		
		
		
		
		
			
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				I still wave at Boxsters, but they no longer wave back :-( 
2002 Boxster S "Violet" (sold but not forgotten) 
2009 Carrera 4S "Kelsey" (current ride) 
2015 FIAT 500e "Nikki" my commuter car
			 
		
		
		
		
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