Description
Cylinder head cover, valve cover for Citroën and Peugeot vehicles with RHR and RHK engines
Product Overview
This cylinder head cover (valve cover) is designed for 2.0 HDi Diesel engines with RHR and RHK engine codes used across various Citroën and Peugeot models. The cover seals the top of the cylinder head, protects the camshaft area from contaminants and prevents oil leakage. Commonly searched by OEM codes, this part is suitable for professional workshops and experienced DIY mechanics who perform engine maintenance or repairs.
Technical Information
- Manufacturer: Stellantis
- Models: Citroën C4; Citroën C4 Picasso; Citroën C5; Citroën C8; Peugeot 3008 I; Peugeot 307; Peugeot 308; Peugeot 407; Peugeot 5008 I; Peugeot 807; Peugeot 508
- Product Codes: 9645977980, 9669688980, 0248Q6
- Additional Numbers: 2.0 HDi; Engine Codes RHR, RHK
Function And Common Failure Modes
The valve cover protects the camshaft, valve train and associated oil passages while sealing the top of the cylinder head. It also houses or connects to the PCV (crankcase ventilation) components on many engines. Common causes of failure include gasket deterioration and hardening due to heat and age, cracked or warped plastic covers from thermal stress, damaged mounting tabs, and blocked or faulty PCV components that increase crankcase pressure and force oil past the seal. Symptoms of a failing cover include visible oil leaks, oil on ignition coils or spark plug wells, burning oil smell, and reduced engine bay cleanliness.
Replacement Guide
Basic steps for replacement (for experienced technicians and competent DIYers):
- Allow Engine To Cool Thoroughly Before Work.
- Remove Components Obstructing Access (Ignition Coils, Wiring Harness Clips, Air Intake Parts As Needed).
- Carefully Remove Valve Cover Bolts In A Cross Pattern Where Applicable And Lift Off The Cover.
- Remove Old Gasket And Clean Mating Surfaces Thoroughly; Use Solvent-Safe Cleaners And A Soft Scraper To Avoid Damage.
- Inspect Bolt Threads And Mounting Points; Replace Any Broken Tabs Or Damaged Fasteners.
- Fit A New Gasket (And New Seals If Required). Ensure Correct Orientation And Even Seating Of The Gasket.
- Refit Cover And Tighten Fasteners To Manufacturer Torque Specification (Do Not Overtighten).
- Replace Or Inspect PCV Valve/Connections If Integrated Or Showing Signs Of Blockage.
- Start Engine, Let Reach Operating Temperature, And Check For Leaks; Reinspect After A Short Test Drive.
Installation Recommendations
Use A New Gasket On Every Replacement. Clean All Contact Surfaces Thoroughly Before Assembly. Tighten Bolts To The Manufacturer’S Specified Torque And Follow The Recommended Fastening Sequence. Replace Any Damaged Clips, Bolts Or Mounting Hardware. If The PCV System Is Accessible, Inspect And Replace The PCV Valve Or Hoses To Prevent Recurrence Of Oil Leaks.
Why This Part Fails Most Often
Failures Typically Result From Gasket Ageing And Loss Of Elasticity Due To High Engine Temperatures, Mechanical Damage To The Cover (Cracks Or Broken Tabs), Or Elevated Crankcase Pressure Caused By A Blocked PCV System. Oil Contamination And Long Service Intervals Without Inspection Accelerate Deterioration.
Notes For Mechanics And DIY Enthusiasts
Searches For This Part Often Use The OEM Codes 9645977980, 9669688980 Or 0248Q6 — including these numbers in parts searches increases the chance of quick identification. This cover Is Commonly Fitted To 2.0 HDi Engines With RHR And RHK Codes Installed In The Listed Citroën And Peugeot Models. Follow Standard Safety Procedures During Replacement And Verify Fitment By Visual Comparison With The Original Part.
Order this cylinder head cover to restore reliable sealing of the camshaft area and prevent oil leaks — suitable for workshops and experienced home mechanics working on 2.0 HDi RHR/RHK engines.
