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					Originally Posted by JFP in PA  It matters more than you might guess; this seal MUST be installed to the correct depth, which is why Porsche released a tool that does this perfectly every time. | 
	
 
I can`t remember now if I just eyeballed it or I measured the 13 mm distance all the way around based on the manual, but this should be doable properly without the tool: 
 
It certainly helps though to have it, I think the tool you are referring to is called 9699.