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Old 01-05-2019, 11:20 AM   #2
311-420
Can't be bridled
 
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Join Date: Sep 2007
Location: Texas
Posts: 7,005
Re: Oil Separator/Catch Can driver or passenger side?

Unless the engine is so broken that the crankcase pressure (blow-by forces) becomes great enough to cause the air in the pcv system to flow the wrong direction backwards into the intake tube, there is no practical use for a pre-filter or oil separator on the passenger side.

Using a separator on the driver's side, however, can be useful provided the design of the can is adequate for the application.

Here's the flow- The pcv system begins at the air intake tube connection to the passenger side cam cover where the intake air travels down through the cam cover. The air charge then flows into the crankcase where it sweeps up dirty/acidic combustion byproducts before making it's way up the driver's side cam cover, out of the pcv valve and into the upper intake where the pcv air is then mixed and burned with the normal incoming air/fuel mixture.
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2004 Mach 1 #6956 5spd w/IUP
Eaton swap, longtubes, built 3.73 SRA
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