06 Jun 11 13:15, Mark Hofmann wrote to Stephen Anderson:   
      
      
      
    SA>> I've not used them, but it sounds rather convenient.  Does it have   
    SA>> any chance of damaging seals by placing the part under a vacuum?   
      
    MH> It has a good deal of vacuum, but not anywhere close to being able to   
    MH> do internal damage.   
      
   If you guys think about it, the crankcase is under more vacuum when the   
   engine is running than any other device such as your oil suction.   
      
   Crankcase ventilation uses engine vacuum to clear out the blowby that   
   the EPA says causes smog.   
      
      
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