🛠️Complete A/C Compressor Replacement Guide (2/3)

Part 2: New Compressor Installation

Step 3 – Check for contamination. If old oil was blackened, replace expansion valve and receiver-drier. If clean, perform oil balancing to prevent noise from oil starvation.

Step 4 – Mount new compressor. Hand-tighten bolts in cross sequence, then torque to manufacturer specs. Set belt tension: new belt = 500-560 N·m; used belt = 300-400 N·m.

Step 5 – Pressure tests. Run positive pressure test at 1.4-1.6 MPa for 30-40 min (leak check). Then vacuum test at -0.08 to -0.1 MPa for 30-50 min (seal check).

Pass both? Ready for refrigerant.

👉 Read Part 3 for charging & testing.