Honda Cylinder Head Cover - 12311-Z9L-000

Overview

Manufacturer: Honda Motor Co., Ltd.

Part: Cylinder Head Cover

The cylinder head cover serves as the top-seal for the engine’s cylinder head, protecting the valve train from contaminants and housing the breather system. This OEM replacement part (Honda part number 12311-Z9L-000) is designed to maintain proper oil containment and crankcase ventilation during routine maintenance or valve-cover gasket service. It provides a direct-fit solution when your engine specifies this exact cover, helping restore original fit and function without aftermarket-fit complications.

Key Features

• Part Number: 12311-Z9L-000
• Type of machine suitable for: Honda engines that require this exact cylinder head cover as the OEM replacement; not a universal fit—verify against the vehicle’s parts diagram or service manual).
• Installation tips:
  • Prepare by removing the old cover and gasket, cleaning mating surfaces, and inspecting for damage.
  • Install with a new gasket; align the cover correctly to avoid gasket mis-seating.
  • Torque fasteners to the manufacturer’s specifications per the official service manual; inspect for leaks after reassembly.
  • If the OEM sequence or sealant is recommended, apply exactly as specified in the service documentation.

Compatibility

• Suitable machine models: Honda engines that list 12311-Z9L-000 as the required cylinder head cover (direct-fit OEM replacement).
• Alternative part numbers: None listed by the manufacturer.