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3.7L/4.7L Engines

WARNING: This page is about a different car, the 2012 RAM Pickup and 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:

Be certain to adjust the refrigerant oil level when servicing the A/C refrigerant system. Refer to OIL, REFRIGERANT, STANDARD PROCEDURE . Failure to properly adjust the refrigerant oil level will prevent the A/C system from operating as designed and can cause serious A/C compressor damage.

NOTE:

When replacing multiple A/C system components, refer to the Refrigerant Oil Capacities chart to determine how much oil should be added to the refrigerant system. Refer to OIL, REFRIGERANT, STANDARD PROCEDURE .

NOTE:

Replacement of the refrigerant line O-ring seals and gaskets is required anytime a refrigerant line is disconnected. Failure to replace the rubber O-ring seals and metal gaskets could result in a refrigerant system leak.

Fig 1: A/C Liquid Line & Suction Line To A/C Expansion Valve
GC0089601Courtesy of CHRYSLER GROUP, LLC
NOTE:

4.7L engine shown in illustration. 3.7L engine similar.

  1. Remove the tape or plugs from the opened refrigerant line fittings and the expansion valve and compressor ports.
  2. Lubricate new O-ring seals with clean refrigerant oil and install them and new gaskets onto the refrigerant line fitting. Use only the specified O-ring seals as they are made of a special material for the R-134a system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
  3. Connect the A/C liquid line (1) and the A/C suction line (5) to the A/C expansion valve (2).
  4. Install the nut (3) that secures the A/C liquid and suction lines to the A/C expansion valve. Tighten the nut to 23 N.m (17 ft. lbs.).
  5. Connect the A/C suction line to the A/C compressor (4).
  6. Install the nut that secures the A/C suction line to the compressor. Tighten the nut to 23 N.m (17 ft. lbs.).
  7. Install the air filter housing cover and resonator inlet tube. Refer to BODY, AIR CLEANER, INSTALLATION, 3.7L or BODY, AIR CLEANER, INSTALLATION, 4.7L .
  8. Reconnect the negative battery cable.
  9. Evacuate the refrigerant system. Refer to PLUMBING, STANDARD PROCEDURE .
  10. Adjust the refrigerant oil level. Refer to OIL, REFRIGERANT, STANDARD PROCEDURE .
  11. Charge the refrigerant system. Refer to PLUMBING, STANDARD PROCEDURE .
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