Valve Cover Breathers

Motor Trend: How to: Installing a 3.9L Cummins dual valve cover and breather assembly on a 12-valve 5.9L

How to: Installing a 3.9L Cummins dual valve cover and breather assembly on a 12-valve 5.9L

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Venting a typical V-8 engine isn't a complex affair. A breather atop each valve cover is usually all that's needed. Of course, replacing one with a PCV valve to introduce a bit of vacuum into the ...

Improper blow-by control can lead to oily breather and valve covers. Is improper control of blow-by gases in your crankcase causing problems in your engine? If any of these questions below sound ...

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Hot Rod: Editor’s Garage: Hide a PCV Valve in an Aluminum Breather and Add Cool Plumbing

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Editor’s Garage: Hide a PCV Valve in an Aluminum Breather and Add Cool Plumbing