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 MANUALSCHEVROLET1968IMPALA 2D CONVERTIBLE, 5.3L ENG, NOT AVAILABLE TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)SUSPENSIONFRONT SUSPENSIONAUTOMATIC LEVEL CONTROLTESTING (ON VEHICLE)CONTROL VALVETIME DELAY
1968 Chevrolet Impala 2D Convertible, 5.3L Eng, Not Available Trans
Time Delay
1968 Chevrolet Impala 2D Convertible, 5.3L Eng, Not Available TransSECTION Time Delay
- Disconnect overtravel lever from link. Disconnect air lines at shock absorbers and intake ports. Connect test gauge to intake valve port and open air pressure (95 psi).
- Move overtravel lever approximately one inch down from neutral position, as measured at end of lever. Hold lever down for 15-20 seconds. Quickly move lever upward two inches and note number of seconds before air starts to escape from shock absorber port. This delay should be 4-22 seconds.
- Proceed with check to determine air exhaust time delay. Remove test gauge and plug intake port. Connect test gauge to shock absorber and open air pressure (95 psi). Move overtravel lever approximately one inch up from neutral position, as measured at end of lever. Note number of seconds before air starts to escape from exhaust port. This delay should be 4-22 seconds.
- If either delay is not within specifications, there is either a loss of silicone fluid or valve may have lost adjustment due to wear or damage.
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.