Details

• Brand:

  

  

• SKU:

  BL3Z-6A664-A

• Other Names:

  Hose Vent, kcv259

• Description:

  This is a genuine Ford crankcase ventilation vent hose, catalogued by Ford under base number 6A664 as Hose Vent, also called PCV Valve Hose or crankcase breather hose, for the 3.5L EcoBoost twin-turbo V6. The hose carries crankcase blow-by vapors through the positive crankcase ventilation circuit so they are drawn back into the intake and reburned, controlling crankcase pressure and emissions on the turbocharged engine. It fits 2011-2012 Ford F-150 and 2011-2012 Lincoln Mark LT equipped with the 3.5L EcoBoost GTDI engine. Owners search for this part after finding a cracked, hardened, or split vent hose, oil misting at the connections, a rough or unstable idle, a hissing or whistling vacuum leak, or lean and PCV-related trouble codes; underhood heat makes the molded hose brittle so it fails at the ends and along bends. Ford lists this as a molded hose engineered to seal to the crankcase and intake fittings without adapters. When installing, inspect the grommets and quick-connect couplers, seat each end fully until it locks, and verify this early-build suffix matches your truck since the ventilation routing was revised during the 3.5L EcoBoost production run. Genuine Ford construction ensures the correct oil- and heat-resistant material and molded shape so the hose seals reliably where generic hoses crack and leak.

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