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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

proper oil cap?

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Old Aug 23, 2012 | 11:43 PM
  #1  
Thumper19's Avatar
Thumper19
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From: Colorado
proper oil cap?

I believe I have the wrong oil cap on my 300-6 because the ones I have seen with the hole on top like mine are for a PCV but I already have a PCV on the valve cover. Can I use a cap that isn't considered a breather and has no ventilation? Or do I need one with the little holes on the bottom?

Here's mine


Can I use one like this?

Buy Mr. Gasket Valve Cover/Oil Filler Cap 2062 at Advance Auto Parts#

or this?
Buy Mr. Gasket Breather/Oil Filler Cap 2061 at Advance Auto Parts
 
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Old Aug 24, 2012 | 01:01 AM
  #2  
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FECruzer69
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I would say that the cap should have breather holes to allow air in so the crankcase vapors can be drawn out through the PCV valve.
 
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Old Aug 24, 2012 | 01:09 AM
  #3  
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NumberDummy
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^ What he said is exactly what the parts catalog shows, a breathable oil cap.
 
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