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			I don't know the torque spec but I had issues with the rubber washers crushing and creating a leak. Replaced with copper washers and tightened to gently compress. No leaks. 
 
After instal, my mechanic said he usually puts an o ring on the drain plug so it centers the copper washer. Worked ok without the oring but thought I'd share his method too.
		 
		
		
		
		
		
		
		
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