Valve Cover Breather
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Valve Cover Breather

  1. #1
    Member
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    Sep 2012
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    45

    Default Valve Cover Breather

    I just replaced the oil pump on my BBC because the spring broke decreasing pressure...I have roller rockers & stud girdle but no deflector plates in the cast aluminum valve covers. At higher rpm, over 3500 & up I'm getting oil out the breather with a new working PCV & breather...my question is I went with a Melling 77HV which gives me 60 lbs. a but 25% more volume over stock, do I need the deflectors or what?...Grommets are serious McMaster-Carr and everything "seems" like a tight fit......

    Thanks Guys

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  3. #2
    Senior Member Sweet Pickle's Avatar
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    Mar 2011
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    Calimesa CA
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    Default

    I run Moroso or Jegs Oil Separators/Breathers which require drilling a 1.25 hole in the cover. Works good with or without Evacuation System
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