Genuine Mazda Crankshaft Thrust Bearing Set – Standard / Oversize • L3Y2-11-SJ0 / SK0 / SKX

Genuine Mazda Crankshaft Thrust Bearing Set – Standard / Oversize

Genuine Mazda crankshaft thrust-bearing 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 thrust bearings are installed at the centre crankshaft main-bearing position. Their thrust faces control fore-and-aft or axial movement of the crankshaft while allowing it to rotate freely.

Correct crankshaft end float is essential for reliable engine operation. Excessive clearance may allow abnormal crankshaft movement, while insufficient clearance can cause binding, overheating and rapid bearing damage.

This listing offers the Genuine Mazda bearing in standard, 0.25mm oversize and 0.50mm oversize versions. The correct size must be selected from accurate measurements of the crankshaft, cylinder block and assembled crankshaft end float.

Important sizing advice: Do not select an oversize bearing solely because the engine is worn or has high mileage. Oversize thrust bearings are intended for a measured repair condition and must correspond with the crankshaft and block machining or wear present.

• Part type: Crankshaft thrust-bearing set
• Common names: Crankshaft thrust washer / thrust metal set
• Mazda catalogue description: Metal Set, Thrust
• Location: Centre crankshaft main-bearing journal
• Function: Controls crankshaft axial movement and end float
• Available sizes: Standard / 0.25mm oversize / 0.50mm oversize
• Quantity fitted per engine: 1 matched thrust-bearing set
• Quantity supplied: 1 selected thrust-bearing set
• Other main bearings included: No
• Crankshaft included: No
• Main-bearing caps included: No
• Brand: Genuine Mazda
• Standard SKU: L3Y2-11-SJ0
• 0.25mm oversize SKU: L3Y2-11-SK0
• 0.50mm oversize SKU: L3Y2-11-SKX
• MX-5 fitment: Mk3, Mk3.5 and Mk3.75 NC 1.8 and 2.0 engines

Size options:

• Standard – L3Y2-11-SJ0: Standard replacement size for an unmachined assembly within Mazda specifications.
• 0.25mm Oversize – L3Y2-11-SK0: Repair-size thrust bearing for an assembly requiring 0.25mm oversize components.
• 0.50mm Oversize – L3Y2-11-SKX: Repair-size thrust bearing for an assembly requiring 0.50mm oversize components.

Typical reasons for replacement:

• Excessive measured crankshaft end float
• Visible scoring or wear on the thrust faces
• Crankshaft or main-bearing replacement
• Cylinder-block machining or repair
• Complete engine rebuild
• Clutch-related axial loading damage
• Metallic contamination or bearing material found in the engine oil

Fitment advice: These bearings are suitable for the original Mazda MX-5 NC 1.8 L8 and 2.0 LF MZR engine architecture. Confirm compatibility where an alternative engine block, crankshaft or aftermarket bearing arrangement has been installed.

Sizing advice: Measure crankshaft end float before dismantling where possible. After disassembly, inspect and measure the crankshaft thrust surfaces, bearing locations and cylinder block. Select the bearing size required by the applicable Mazda repair specification and any machining that has been performed.

Other items to consider: Inspect the complete main-bearing set, crankshaft journals, thrust surfaces, cylinder block, main caps, clutch and flywheel or automatic drive plate. Excessive clutch release load or incorrect drivetrain alignment may contribute to thrust-bearing wear.

Useful tools / consumables: Dial indicator and magnetic base, micrometer, bore gauge, calibrated torque wrench, angle gauge where required, bearing-clearance checking material, clean engine assembly lubricant and suitable engine-support equipment.

Difficulty guide: DIY Difficulty: Specialist / Advanced. Significant engine dismantling is required. Bearing selection, crankshaft measurements, main-cap installation and end-float checks must be completed accurately.

Why Genuine Mazda? Genuine Mazda thrust bearings are manufactured to match the original crankshaft diameter, thrust-face profile, bearing location and specified repair sizes. Correct bearing dimensions are essential for maintaining the intended crankshaft end float.

What’s in the box: One Genuine Mazda crankshaft thrust-bearing set in the size selected from the product options.

Installation notes: Keep all main-bearing caps in their original positions and orientation. Clean and inspect the crankshaft, block and bearing locations carefully before assembly. Lubricate the bearing surfaces using clean engine assembly lubricant, install the selected thrust-bearing set in the specified position and tighten the main caps in the Mazda sequence. Measure crankshaft end float with a dial indicator after assembly and confirm that it falls within the applicable workshop specification before continuing the engine build.