hvac

AC Compressor

for 2017 Dodge Viper 8.4L V10 · RWD

Difficulty

Moderate

Time

2.4 h

Tools

Steps

✓Fact-checked. Built from OLP's spec database, then independently fact-checked line by line with every correction applied. Master-tech sign-off by Chris Hackleman is queued. Cross-check torque values against the factory manual, and stop if anything looks unsafe. How our data is made.

Remove and replace the AC compressor on a 2008 Dodge Viper 8.4L V10, including refrigerant recovery, disconnection of lines and clutch connector, and system recharge.

Warnings

⚠️AC refrigerant must be recovered by certified equipment before opening the system. Venting refrigerant to atmosphere is illegal and environmentally harmful.

⚠️Refrigerant oil under pressure can cause eye injury. Wear safety glasses during all AC work.

⚠The AC compressor is located low on the driver's side of the engine. Work may require reaching into tight spaces near hot exhaust components if engine has recently run.

ℹ️New compressors are typically shipped with protective oil charge. Verify oil quantity requirements with compressor manufacturer before installation.

Tools required

AC recovery/evacuation/recharge machineEssential

Refrigerant identifierEssential

3/8" drive ratchet and socket set (metric)Essential

Torque wrench (5-50 Nm range)Essential

Serpentine belt removal tool

Line disconnect tools for quick-connect fittings (if equipped)

UV leak detection dye kit

Safety glassesEssential

Nitrile glovesEssential

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Parts

AC compressor × 1 — Denso 471-6032 or equivalent OEM
AC line O-rings (assortment) × 1 — Use OEM specification
PAG oil for AC system × 1 — PAG-46 or PAG-100 per compressor spec
Serpentine belt × 1 — Replace if worn or contaminated

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Fluids

R-134a

Preparation

Park vehicle on level surface and engage parking brake.
Allow engine to cool completely if recently operated.
Disconnect negative battery cable to prevent accidental clutch engagement.
Verify AC system contains R-134a refrigerant using identifier tool before recovery.
Position drain pan under compressor area to catch any residual oil during removal.

Procedure

1
Recover AC refrigerant
Connect AC recovery machine to the system's service ports (low-side and high-side). Follow machine manufacturer instructions to fully recover all refrigerant from the system. Record the amount of oil recovered with the refrigerant, as this will need to be replaced during reassembly. Verify system pressure reaches 0 psig before proceeding.
2
Remove serpentine belt
Locate the serpentine belt tensioner on the front of the engine. Rotate the tensioner counterclockwise using a 3/8" drive ratchet in the tensioner's square drive hole to release tension. Slide the belt off the pulleys, noting the routing path (take a photo if necessary). Slowly release tensioner. Inspect belt for contamination or damage; replace if oil-saturated from a leaking compressor.
3
Disconnect AC compressor clutch connector
Locate the electrical connector on the compressor clutch coil at the front of the compressor. Press the release tab and pull the connector straight off the compressor. Move the wiring harness aside to prevent damage during removal.
4
Disconnect AC line fittings from compressor
The compressor has two refrigerant line connections: discharge (high-pressure) and suction (low-pressure). Remove the two bolts securing each line fitting to the compressor. On this platform, the fittings use bolt-on flange connections. Immediately cap or plug all open ports with clean plastic caps to prevent moisture and debris entry. Remove and discard the old O-rings from the line fittings.
Torque spec
AC Line Fittings20 Nm (15 lb-ft)
5
Remove compressor mounting bolts
Locate the compressor mounting bolts securing the compressor to its bracket (verify exact count and location against 2008 Viper service manual). Remove all mounting bolts while supporting the compressor weight. Remove all mounting bolts while supporting the compressor weight. The compressor mounts to a bracket attached to the front of the engine.
Torque spec
AC Compressor Mounting Bolts25 Nm (18 lb-ft)
6
Remove compressor from vehicle
Maneuver the compressor out of its mounting location. On the Viper, access is from underneath and requires tilting the compressor to clear surrounding components. Drain any residual oil from the old compressor into the drain pan and measure the quantity. Keep the compressor upright during removal to prevent oil from entering refrigerant passages.
7
Prepare new compressor for installation
Remove shipping plugs from the new compressor ports. Drain the protective shipping oil from the new compressor and measure it. Calculate the total oil requirement: take the amount drained from the old compressor, add the amount recovered during refrigerant recovery, then subtract the new compressor's shipping oil. Add the correct type and quantity of fresh PAG oil to the new compressor through the suction port. Total PAG oil charge should be verified against the 2008 Viper service specification; adjust based on measured values from old compressor and refrigerant recovery. Verify compressor clutch rotates freely by hand.
8
Install new compressor
Position the new compressor into the mounting bracket, reversing the removal process. Align the compressor with the mounting holes. Thread all mounting bolts by hand to prevent cross-threading, then tighten to specification in a cross-pattern.
Torque spec
AC Compressor Mounting Bolts25 Nm (18 lb-ft)
9
Install new O-rings and connect AC lines
Install new O-rings onto both AC line fittings (discharge and suction). Lightly coat the O-rings with fresh PAG oil for proper sealing. Position the line fittings onto the compressor ports, ensuring proper alignment. Install the bolts for each fitting and tighten to specification.
Torque spec
AC Line Fittings20 Nm (15 lb-ft)
10
Reconnect clutch connector and reinstall belt
Push the electrical connector firmly onto the compressor clutch coil terminal until it clicks into place. Rotate the belt tensioner counterclockwise and route the serpentine belt back onto all pulleys following the original path, ensuring it is properly seated in all pulley grooves. Release tensioner to apply tension.
11
Evacuate and recharge AC system
Reconnect the battery negative cable. Connect the AC service machine to both service ports. Evacuate the system to at least 29 inches of mercury vacuum for a minimum of 30 minutes to remove all moisture and air. Monitor for vacuum loss; if vacuum drops, there is a leak that must be repaired. After successful evacuation, recharge the system with the specified amount of R-134a refrigerant per the underhood decal specification. Add UV dye if desired for future leak detection.

Reassembly

Torque all fasteners to specification as listed in the procedure steps.
Ensure serpentine belt is properly seated on all pulleys before starting engine.
Verify all electrical connections are secure and properly locked.

Verification

Start the engine and turn AC to MAX with fan on high.
Verify compressor clutch engages (you should hear a click and see the clutch plate pull in).
Check for cold air from cabin vents within 2-3 minutes of operation.
Inspect all line connections for signs of refrigerant leakage (oil seepage, frost formation).
Use a leak detector or UV light (if dye was added) to check all connections.
Monitor AC system performance over the next few days to ensure proper operation and no pressure loss.