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 MANUALSCHEVROLET1990V 30 P/U 4WD V8-454 7.4LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGCOMPRESSOR HVACCOMPRESSOR CONTROL VALVE ASSEMBLYSERVICE AND REPAIR
1990 Chevrolet V 30 P/U 4WD V8-454 7.4L
Compressor Control Valve Assembly: Service and Repair
1990 Chevrolet V 30 P/U 4WD V8-454 7.4LSECTION Service and Repair
V5 COMPRESSOR
Remove or Disconnect
Tools Required:
J 5403 Internal Snap Ring Pliers
1. Retainer ring with J 5403.
2. O-ring seal (44).
3. valve (5).
Install or Connect
Tools Required:
J 5403 Internal Snap Ring Pliers
1. Valve (5)
2. O-ring seal (44).
^ Dip the seals into new clean 525 refrigerant oil.
3. Retainer (45) with J 5403.
Rear Head Details - V5 Compressor:
Compressor Components:
Remove or Disconnect
Tools Required:
J 5403 Internal Snap Ring Pliers
1. Retainer ring with J 5403.
2. O-ring seal (44).
3. valve (5).
Install or Connect
Tools Required:
J 5403 Internal Snap Ring Pliers
1. Valve (5)
2. O-ring seal (44).
^ Dip the seals into new clean 525 refrigerant oil.
3. Retainer (45) with J 5403.
RENDER: 1.0x
NO RELATED
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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.