The diesel engine on certain Ford Super Duty trucks has a large and complex air separator box assembly on the engine that filters crankcase blowby gasses before they are re-introduced back into the engine intake. On this type of engine system, the PCV valve diaphragm becomes clogged with oil and carbon deposits, leading the air separator assembly to fail. This causes excessive crankcase pressure, resulting in oil leaks, high idle and a decrease in engine performance. This Dorman OE FIX PCV valve diaphragm replaces just the diaphragm instead of the whole separator assembly to reduce cost and downtime of the truck.

CCV Diaphragm Repair Kit 918-359 Features:

• Fits 2011-2019 Ford F-250 Super Duty; 2011-2019 Ford F-350 Super Duty; 2011-2019 Ford F-450 Super Duty; 2011-2019 Ford F-550 Super Duty
• Simple repair — this PCV valve diaphragm directly replaces just the original diaphragm on specific Ford trucks without requiring a complete assembly replacement
• Direct replacement — this PCV valve diaphragm is designed to match the fit and function of the original diaphragm on specific Ford Super Duty trucks with a diesel engine
• Trustworthy quality — backed by team of product experts in the United States and more than a century of automotive experience