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 MANUALSCHEVROLET1985NOVA BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)STEERINGMANUAL STEERINGPOWER STEERING GENERAL SERVICINGTESTINGPRESSURE TEST
1985 Chevrolet Nova Base, Standard
Pressure Test
1985 Chevrolet Nova Base, StandardSECTION Pressure Test
CAUTION:
DO NOT
hold valve closed for more than 5 seconds as pump damage may result.
- Remove high pressure line from pump. Attach Adapter Fitting (J-5176-11) to pump. Using Pressure Gauge (J-5176-02), and Adapter (J-5176-12), connect gauge to hose.
- Open valve fully and run engine until fluid reaches normal operating temperature. Check fluid level and add if necessary. With engine at operating temperature, pressure reading should be 80-125 psi (5.6-8.8 kg/cm2 ).
- If pressure is above 200 psi (14 kg/cm2 ), inspect system for restrictions or faulty poppet valve. Shut valve on gauge then open fully 3 times while recording highest pressure obtained.
- If recorded pressures are all within 50 psi (3.5 kg/cmJ(2)), pump performance is acceptable. If pressures are high and not within 50 psi (3.5 kg/cm2 ) of each other, flow control valve is sticking. If pressures are constant and over 1.00 psi (7.0 kg/cm2 ), but below 1350 psi (94.9 kg/cm2 ), replace flow control valve and recheck.
- If pump meets specification, leave valve open and turn steering wheel from stop to stop. Record highest pressure to compare with maximum pump pressure.
- If pressure at both stops is not similar to maximum pressure, steering gear is leaking internally. Shut off engine, remove testing equipment, check fluid level, or make necessary repairs.
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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.