Genuine Mazda Cylinder Head Gasket – 1.8 MZR • L801-10-271

Genuine Mazda L801-10-271 Cylinder Head Gasket – 1.8 MZR

Replacement Genuine Mazda cylinder head gasket for Mazda MX-5 Mk3, Mk3.5 and Mk3.75 NC models fitted with the 1.8-litre L8-VE petrol engine.

The cylinder head gasket seals the joint between the aluminium cylinder head and engine block. It maintains combustion pressure while keeping the engine-oil passages, coolant passages and combustion chambers correctly separated.

This is a multilayer-steel gasket designed around the approximately 83mm cylinder bore of the 1.8-litre MZR engine. The layered construction provides the controlled sealing pressure and movement tolerance required between the cylinder head and block.

Cylinder head gaskets are single-use components and must not be reused after the cylinder head has been removed. One gasket is fitted per engine, and this listing supplies one Genuine Mazda gasket.

Engine restriction: L801-10-271 is for the 1.8-litre L8-VE engine. MX-5 NC models with the 2.0-litre LF-VE engine require a different cylinder head gasket.

• Part type: Cylinder head gasket
• Engine application: 1.8-litre MZR petrol engine
• Engine code: L8-VE
• Location: Between the cylinder block and cylinder head
• Construction: Multilayer steel
• Approximate engine bore: 83mm
• Function: Seals combustion pressure, coolant and engine-oil passages
• Quantity fitted per engine: 1
• Quantity supplied: 1 gasket
• Cylinder head bolts included: No
• Valve-cover gasket included: No
• Inlet-manifold gasket included: No
• Exhaust-manifold gasket included: No
• Sealant included: No
• Reusable component: No
• Brand: Genuine Mazda
• Part No.: L801-10-271
• MX-5 fitment: Mk3, Mk3.5 and Mk3.75 NC 1.8 models

Possible signs of cylinder head gasket failure:

• Engine overheating or repeated coolant loss
• Combustion gases entering the cooling system
• Excessive pressure within the expansion tank
• White exhaust smoke after the engine has warmed up
• Coolant entering one or more cylinders
• Engine oil contaminated by coolant
• External oil or coolant leakage at the head-to-block joint
• Low or uneven cylinder compression
• Misfire following a cold start

Fitment advice: Confirm that the engine is the 1.8-litre L8-VE before ordering. This gasket is not suitable for the 2.0-litre LF-VE engine, despite both engines being used within the MX-5 NC generation.

Diagnosis advice: Cylinder head gasket failure should be confirmed before dismantling. Cooling-system pressure testing, combustion-gas testing, compression testing and cylinder leak-down testing can help identify the fault and determine whether the cylinder head or engine block has also been damaged.

Replacement advice: The cylinder head and block sealing surfaces must be thoroughly cleaned and inspected. The cylinder head should be checked for distortion, cracking and surface damage, particularly where the engine has previously overheated.

Other items to consider: Inspect or replace the cylinder head bolts, valve-cover gasket, inlet- and exhaust-manifold gaskets, valve-stem seals, timing-chain components, thermostat, water pump and cooling-system hoses. Fresh engine oil, oil filter and Mazda-compatible coolant will also be required.

Useful tools / consumables: Engine-support equipment, timing tools, calibrated torque wrench, angle gauge, precision straightedge, feeler gauges, gasket-surface cleaning equipment, thread-cleaning tools, fresh engine oil, oil filter and correct coolant.

Difficulty guide: DIY Difficulty: Specialist / Advanced. Replacement requires removal and refitting of the cylinder head, correct timing-chain setup, accurate fastener tightening and careful preparation of the sealing surfaces.

Why Genuine Mazda? Genuine Mazda cylinder head gaskets match the original bore spacing, coolant and oil passage locations, fire-ring profile, compressed thickness and multilayer construction. Accurate alignment and sealing characteristics are critical to combustion sealing and long-term engine reliability.

What’s in the box: One Genuine Mazda multilayer-steel cylinder head gasket for the 1.8-litre L8-VE engine, part number L801-10-271.

Installation notes: Drain the cooling system and engine oil before removing the cylinder head in accordance with the applicable Mazda workshop procedure. Retain the timing components securely and prevent debris entering the engine. Remove all gasket residue without scratching the aluminium sealing surfaces. Check the cylinder head and block for distortion and damage before assembly. Install the new gasket in the correct orientation onto clean, dry locating surfaces. Use the specified cylinder head bolts and follow the complete Mazda tightening sequence, torque stages and angle-tightening procedure. Reassemble the timing system accurately, rotate the engine manually to confirm correct timing and clearance, then refill with fresh oil and coolant. Bleed the cooling system thoroughly and check for leaks, stable temperature and correct engine operation.