Musashi Camshaft / Rocker Cover Gasket • TPM9146N

Musashi TPM9146N Camshaft / Rocker Cover Gasket

Replacement Musashi camshaft / rocker cover gasket for Mazda MX-5 Mk1 NA, Mk2 NB and Mk2.5 NB-FL 1.6 petrol models listed in the compatibility table.

Designed as an aftermarket replacement for the original component, this gasket seals the joint between the camshaft / rocker cover and cylinder head, helping retain engine oil within the upper cylinder-head and valvetrain area.

One gasket is used per engine. Age, repeated heat cycles and long-term compression can cause the existing gasket to harden, flatten or lose its seal.

Common reasons for replacement include oil weeping around the rocker-cover joint, oil appearing around the upper cylinder head, or replacement while the rocker cover has been removed for timing-belt, valvetrain or other engine work.

• Part type: Camshaft / rocker cover gasket
• Primary use: Seals the rocker cover to the cylinder head
• Location: Upper engine / cylinder head
• Position: Camshaft / rocker cover
• Engine application: Mazda B6 / B6-ZE 1.6
• Quantity per vehicle: 1
• Quantity supplied: 1 gasket
• Brand: Musashi
• Part No.: TPM9146N
• Designed as an aftermarket replacement for the applications listed in the compatibility table

Fitment advice: Suitable for the Mazda MX-5 1.6 B6-engine applications listed in the compatibility table. This gasket is specific to the confirmed 1.6 application; the corresponding 1.8-litre MX-5 models use a different rocker-cover gasket.

Other items to consider: When changing this part, you may also want to consider purchasing related camshaft seals, timing-belt service components where applicable, other upper-engine seals and service consumables accessible while the rocker cover is removed.

Useful tools / consumables: Normal hand tools, torque wrench, plastic gasket / surface cleaning tools and suitable brake cleaner or degreaser.

Difficulty guide: DIY Difficulty: Moderate. Access to the rocker cover itself is relatively straightforward, but careful surface preparation, correct gasket positioning and correct cover refitting are important for a reliable seal.

Why Musashi? Musashi parts are aftermarket replacement components designed for reliable sealing, fitment and service use on the applications listed. They are a practical option for maintenance, repair and refurbishment work where the correct component style, size and application match are required.

What’s in the box: 1 × Musashi TPM9146N camshaft / rocker cover gasket.

Installation notes: Clean and inspect the rocker-cover and cylinder-head mating surfaces before installation. Remove contamination and old sealing residue without damaging the surfaces, ensure the replacement gasket is correctly located and does not become pinched or displaced when the cover is installed, and follow the appropriate workshop procedure for cover tightening and any application-specific sealant requirements.