Genuine Mazda Camshaft / Rocker Cover Gasket Set – 4 Piece • L501-10-230

Genuine Mazda L501-10-230 Camshaft / Rocker Cover Gasket Set – 4 Piece

Replacement Genuine Mazda camshaft cover gasket set for Mazda MX-5 Mk3, Mk3.5 and Mk3.75 NC models with 1.8 L8-VE or 2.0 LF-VE MZR petrol engines.

The gasket set seals the joint between the plastic camshaft or rocker cover and the cylinder head. It prevents engine oil escaping from the upper engine while helping protect the valvetrain from dust, moisture and other contamination.

The Mazda MX-5 NC camshaft cover uses a four-piece sealing arrangement. This complete set is suitable for both the 1.8 and 2.0 MZR engines, with one set required per engine.

Age, repeated heat cycles and long-term compression can cause the original rubber seals to harden, flatten or split. Oil may then escape around the cover perimeter or collect near the ignition-coil and spark-plug areas.

• Part type: Camshaft cover gasket set
• Common names: Rocker-cover gasket / valve-cover gasket
• Mazda catalogue description: Gasket, Head Cover / Cover, Seal
• Location: Between the plastic camshaft cover and cylinder head
• Function: Seals engine oil within the cylinder-head and valvetrain area
• Set contents: Four sealing pieces
• Engine compatibility: 1.8 L8-VE and 2.0 LF-VE
• Quantity fitted per engine: 1 complete set
• Quantity supplied: 1 four-piece gasket set
• Camshaft cover included: No
• Cover bolts included: No
• Liquid gasket or sealant included: No
• Brand: Genuine Mazda
• Part No.: L501-10-230
• Associated Mazda references: LF02-10-230 / ZZCA-10-230 / 8LGJ-10-271
• MX-5 fitment: Mk3, Mk3.5 and Mk3.75 NC 1.8 and 2.0 models

Possible signs of a failing camshaft-cover gasket:

• Engine oil around the edge of the camshaft cover
• Oil running down the cylinder head or engine block
• Oil collecting around ignition coils or spark-plug areas
• Burning-oil smell from oil reaching hot engine components
• Visible cracking, flattening or hardening of the original seals
• Oil residue returning after the upper engine has been cleaned

Fitment advice: This set is designed for the original plastic camshaft cover fitted to Mazda MX-5 NC 1.8 and 2.0 MZR engines. Confirm compatibility where a replacement engine, alternative cylinder head or non-standard camshaft cover has been installed.

Other items to consider: Inspect the plastic camshaft cover for cracking or distortion, particularly around bolt holes and breather connections. Check the cover bolts, ignition-coil seals, PCV and breather hoses, oil-filler-cap seal and any workshop-specified liquid-gasket joints.

Useful tools / consumables: Suitable socket set, low-range calibrated torque wrench, plastic gasket scraper, brake cleaner or suitable degreaser, lint-free cloths and Mazda-approved liquid gasket where specifically required by the workshop procedure.

Difficulty guide: DIY Difficulty: Moderate. Access requires removal or repositioning of surrounding intake, breather and electrical components. The plastic cover can be damaged by excessive or uneven tightening.

Why Genuine Mazda? Genuine Mazda camshaft-cover seals are manufactured to match the original cover grooves, cylinder-head sealing surfaces and required rubber profile. Correct dimensions help provide even compression and reliable oil sealing around the complete cover assembly.

What’s in the box: One Genuine Mazda four-piece camshaft / rocker cover gasket set, part number L501-10-230.

Installation notes: Allow the engine to cool before removing the camshaft cover. Disconnect the required breather hoses, wiring and ignition components, then loosen the cover fasteners progressively. Remove all old gasket material and clean the mating surfaces without allowing debris to enter the cylinder head. Fit every seal fully into its corresponding cover groove and apply liquid gasket only at the locations specified by Mazda. Refit the cover squarely and tighten the bolts gradually in the prescribed sequence and to the applicable low torque specification. Check for oil leakage after the engine has reached operating temperature.