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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 188 (FUEL SYSTEM)NONRETURN VALVE INSPECTION
1999 Mazda 626 ES, 2.5 D, Standard
NONRETURN Valve Inspection
1999 Mazda 626 ES, 2.5 D, StandardSECTION NONRETURN Valve Inspection
WARNING: This page is about a different car, the 2004 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the nonreturn valve. (See FUEL TANK REMOVAL/INSTALLATION .)
- Verify that the nonreturn valve opens up to 90 degrees
when it is pushed from the fuel-filler pipe side, and it returns to the normal position by the spring force.
- If the nonreturn valve does not open up to 90 degrees or does not return to the normal position, replace the nonreturn valve.
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:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.