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 MANUALSFORD1980PINTO BASE, 2D WAGON, AUTOMATIC TRANS, TRANS MFR CD C3REPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSTHERMACTOR SYSTEMSTESTINGCHECK VALVE
1980 Ford Pinto Base, 2D Wagon, Automatic Trans, Trans Mfr CD C3
Check Valve
1980 Ford Pinto Base, 2D Wagon, Automatic Trans, Trans Mfr CD C3SECTION Check Valve
- Disconnect hose to check valve at bypass valve. Connect a suitable squeeze bulb tester to hose.
- Squeeze bulb to force as much air from bulb as possible. Quickly release bulb and start timing. The bulb should remain collapsed (not returning to its original shape) for at least 15 seconds.
- If bulb returns to its original shape within 15 seconds, check bypass hose to ensure that it is free of leaks. If hose is in good shape, replace check valve.
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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.