Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1999626 ES, 2.5 D, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALTIMING BELT2.5L V6ENGINE SPECIFICATIONSPISTONS, PISTON PINS & PISTON RINGS SPECIFICATIONS
1999 Mazda 626 ES, 2.5 D, Standard
Pistons, Piston Pins & Piston Rings Specifications
1999 Mazda 626 ES, 2.5 D, StandardSECTION Pistons, Piston Pins & Piston Rings Specifications
PISTONS, PINS & RINGS
| Application | In. (mm) | ||||||
|---|---|---|---|---|---|---|---|
| Pistons | |||||||
| Clearance | |||||||
| Standard | .0012-.0022 (.030-.056) | ||||||
| Maximum | .005 (.13) | ||||||
| Diameter | |||||||
| Standard | 3.3249-3.3262 (84.452-84.485) | ||||||
| .010" (.25 mm) Oversize | 3.3347-3.3360 (84.701-84.734) | ||||||
| .020" (.50 mm) Oversize | 3.3346-3.3459 (84.699-84.986) | ||||||
| Pin Bore Diameter | .7869-.7874 (19.988-20.000) | ||||||
| Pins | |||||||
| Diameter | .7864-.7866 (19.975-19.980) | ||||||
| Piston Fit | .0004-.0010 (.010-.025) | ||||||
| Rod Fit (Interference Fit) | .0005-.0015 (.013-.038) | ||||||
| Rings | |||||||
| No. 1 | |||||||
| End Gap (1) | .006-.012 (.15-.30) | ||||||
| Side Clearance (2) | .0008-.0026 (.020-.066) | ||||||
| No. 2 | |||||||
| End Gap (1) | .010-.016 (.25-.41) | ||||||
| Side Clearance (2) | .0012-.0025 (.030-.064) | ||||||
| No. 3 (Oil) | |||||||
| End Gap (1) | .008-.028 (.20-.71) | ||||||
| Side Clearance (2) | .007-.016 (.18-.41) | ||||||
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RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.