High-quality replacement valve cover for 1.6 8V HDi engines, compatible with a wide range of Citroën and Peugeot models. This part seals the top of the cylinder head, protects the valvetrain from dirt and debris and prevents oil leaks. Frequently referenced by OEM numbers 9688939180, 9689112980 and part code 0248S0 — include these identifiers when searching or ordering to improve compatibility and find the correct match fast.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: 1.6 HDI 8V
• Product Codes: 9688939180, 9689112980
• Additional Numbers: 0248S0

Fitment

• Citroën Berlingo III
• Citroën C4 II
• Citroën C4 Picasso
• Peugeot 3008 I
• Peugeot 308
• Peugeot 5008 I
• Peugeot Partner Tepee

Function And Description

The valve cover protects the camshafts, rocker arms and valve train while keeping engine oil contained in the top end. It also provides mounting points for ignition coils, breather hoses and the PCV (positive crankcase ventilation) system. A secure seal between the valve cover and cylinder head is essential to prevent oil leaks, contamination and pressure loss in the crankcase ventilation system.

Replacement Procedure (Overview)

• Work On A Cold Engine: Allow the engine to cool before starting work.
• Remove Obstructions: Detach air intake components, ignition coils and hoses that obstruct access to the cover.
• Remove Cover Bolts: Loosen bolts in a cross pattern and remove the valve cover.
• Clean Mating Surfaces: Carefully clean the cylinder head and cover mating surfaces; remove old gasket material without scratching.
• Replace Gasket And Seals: Fit a new gasket and any damaged grommets or seals.
• Refit And Torque: Reinstall the cover and tighten bolts to the manufacturer’s torque specification and sequence.
• Reconnect Components: Reinstall ignition coils, hoses and intake components. Start the engine and check for leaks.

Installation Recommendations

• Always Use A New Gasket: Replace the valve cover gasket and any worn bolt seals or washers when installing the cover.
• Clean Surfaces Thoroughly: Ensure both mating surfaces are clean and dry to achieve a reliable seal.
• Follow Torque And Sequence: Tighten bolts in the correct sequence and to the manufacturer’s torque values to avoid warping or leaks.
• Inspect Related Parts: Check the PCV valve, ignition coil boots and mounting studs; replace if cracked or degraded.
• Professional Tools: Use proper tools and, for best results, a torque wrench. If uncertain, have the job performed by a qualified technician.

Why The Part Commonly Fails

• Gasket Deterioration: Rubber and composite gaskets harden, shrink or crack with age and heat, leading to oil leaks.
• Overheating And Warpage: Excessive engine temperatures or improper bolt tightening can warp the cover, breaking the seal.
• Cracks Or Impact Damage: Physical damage from tools or debris can crack the cover, especially around mounting points.
• PCV System Faults: A blocked or failed PCV valve can create excess crankcase pressure, forcing oil past the gasket.
• Worn Mounting Hardware: Stripped threads, damaged studs or missing washers reduce clamping force and lead to leaks.

Signs To Watch For

• Visible Oil Leaks Around The Valve Cover
• Oil On Ignition Coils Or Spark Plug Wells Causing Misfires
• Burning Oil Smell Or Smoke From Engine Bay
• Low Oil Level Without External Leak Elsewhere

Including the OEM numbers 9688939180, 9689112980 and code 0248S0 in searches increases the chance of finding an exact-fit replacement for your 1.6 HDi engine. Replace the valve cover gasket during major services or if any of the above symptoms appear to protect the engine and maintain proper crankcase ventilation.

The Valve Cover Diaphragm Kit 1.6 HDi 0248S0 is a new, direct-fit replacement diaphragm and pressure/breather component for PSA Citroën & Peugeot 1.6 HDi engines. Designed for professional mechanics and competent DIY enthusiasts, this part restores correct crankcase ventilation, helps prevent oil leaks at the valve cover area and ensures stable engine running conditions.

Function And Benefits

• Regulates crankcase pressure and routes oil vapour back to the intake system for combustion, reducing emissions.
• Helps prevent oil leaks around the valve cover by maintaining correct ventilation pressure.
• Direct-fit replacement for the original diaphragm assembly identified by product code 0248S0.

Replacement Guide

Basic replacement steps: drain or remove obstacles to access the valve cover, unfasten the valve cover retaining bolts and remove the cover, remove the old diaphragm and any retaining clips, clean the contact surfaces thoroughly, fit the new diaphragm ensuring correct seating and orientation, replace the valve cover gasket if worn, and reassemble using the manufacturer's specified torque for the cover fasteners. After installation, check for oil leaks and proper idle with the engine at operating temperature.

Common Failure Modes And Maintenance

• Ageing rubber and hardening of the membrane lead to vacuum leaks and loss of proper ventilation control.
• Oil contamination, sludge, and debris can degrade the diaphragm surface and sealing edge.
• Heat cycling may cause cracks or tears in the membrane, producing rough idle, increased oil consumption or oil leaks.

Technical Information

• Manufacturer: PSA (Citroën, Peugeot)
• Model: 1.6 HDi Engines (PSA)
• Product Codes: 0248S0
• Additional Numbers: Not specified