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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1989CAPRICE BASE, 4.3 Z, 700R4/MD8REPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSA/C SYSTEM DIAGNOSIS - MANUALREFRIGERANT SYSTEM DIAGNOSISQUICK CHECK PROCEDURE
1989 Chevrolet Caprice Base, 4.3 Z, 700R4/MD8
Quick Check Procedure
1989 Chevrolet Caprice Base, 4.3 Z, 700R4/MD8SECTION Quick Check Procedure
- Engine must be at normal operating temperature, choke must be open, and throttle must be off fast idle speed cam. Open vehicle's doors and engine hood.
- Set function lever to "NORM" position, temperature lever at "COLD" position, and blower on "HI" position. Engine should be at normal slow idle speed.
- Feel the temperature of the accumulator surface and the evaporator inlet pipe while the compressor is engaged. On some vehicles it is normal for the compressor to cycle on and off to meet system requirements.
- If the accumulator surface and evaporator inlet pipe are both at the same temperature, and slightly cooler than ambient air, system is normal. If inlet pipe is frosted or feels cooler than accumulator surface, refrigerant charge is low.
- Add refrigerant in 4 oz. increments, allowing system to stabilize between additions, until both feel same temperature. Add 14 oz. more refrigerant.
NOTE:
CCOT system does not have a sight glass. DO NOT install a sight glass.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.