Author Topic: valve covers with breathers VS valve covers without  (Read 3574 times)

Frank Virginia

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valve covers with breathers VS valve covers without
« on: August 08, 2009, 08:44:55 PM »
thinking about buying some valve covers that dont have any breather holes or oil fill holes will this fry my engine or dosent it really matter if u have breathers or not ?   special tool is needed to put oil in so dont worry about that


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  • Mustang: 1965 coupe 289, and 2003 Mach1
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Re: valve covers with breathers VS valve covers without
« Reply #1 on: August 09, 2009, 04:58:29 PM »
What special tool are you talking about?  A straw that fits in your tube where you check the oil?  ;D  You don't need a breather cap on an EFI engine, but you do on a carbureted engine.  You can use a closed oil cap or do the straw thing if yours is an EFI engine.  I don't think an 80 Mustang engine is an EFI engine though, so you will need a breather cap on the driver's side in addition to your PCV hole on the passenger side, otherwise pressure will build up and you will have engine damage.  Bad idea.   



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