hvac

AC Compressor Clutch

for 2017 Dodge Viper 8.4L V10 · RWD

Difficulty

Advanced

Time

2.2 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 clutch assembly on a 2008 Dodge Viper 8.4L V10, including serpentine belt removal and refrigerant system precautions.

Warnings

⚠️AC refrigerant must be properly recovered by a certified technician using approved equipment. Venting refrigerant to atmosphere is illegal and environmentally harmful.

⚠️Do not attempt to remove AC components with refrigerant still in the system. System pressure can cause serious injury.

⚠The Viper engine bay is extremely tight. Ensure engine is fully cooled before beginning work to prevent burns.

⚠The AC compressor clutch must be properly aligned and gapped or it will fail prematurely and may cause belt noise or damage.

ℹ️This procedure assumes the compressor itself is functional and only the clutch assembly requires replacement. If compressor is seized or leaking, full compressor replacement is required.

Tools required

AC manifold gauge setEssential

AC recovery machineEssential

Socket set (metric)Essential

Torque wrenchEssential

Snap ring pliers (internal)Essential

AC clutch hub holder toolEssential

Feeler gaugeEssential

Ratchet with extensionsEssential

Serpentine belt tool

Digital multimeter

Pulley puller set

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 clutch assembly × 1 — Use OEM specification
AC compressor clutch coil × 1 — Use OEM specification or included with clutch kit
Snap ring (compressor shaft) × 1 — Often included with clutch kit
Shim set (clutch air gap adjustment) × 1 — Use OEM specification

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 for at least 2 hours
Disconnect negative battery cable and isolate from battery post
Have AC system professionally evacuated and refrigerant recovered using proper AC recovery equipment
Verify system is fully depressurized before proceeding with any component removal
Remove engine cover if equipped

Procedure

1
Disconnect AC clutch electrical connector
Locate the AC compressor clutch electrical connector on the front of the compressor. Press the locking tab and disconnect the connector from the clutch coil. Move the harness aside to prevent damage during clutch removal.
2
Remove serpentine drive belt
Locate the serpentine belt tensioner on the front of the engine. Using a ratchet or serpentine belt tool, rotate the tensioner clockwise to relieve belt tension. Slip the belt off the AC compressor pulley first, then remove from remaining pulleys. Note the belt routing before removal or reference the belt routing diagram on the radiator support.
3
Remove clutch coil retaining bolt
Locate the coil retaining fastener or snap ring securing the AC compressor clutch coil to the compressor front housing (many compressors retain the coil with a snap ring rather than a center bolt). Remove this bolt using an appropriate metric socket. The bolt secures the coil to the compressor front housing. Keep bolt for reinstallation.
4
Remove AC clutch coil
Carefully pull the clutch coil straight off the compressor nose. The coil may be tight due to corrosion or dirt buildup. Wiggle gently while pulling if needed, but do not pry or force. Inspect coil for signs of overheating, oil contamination, or damage. Replace coil if damaged or if included with clutch kit.
5
Remove clutch hub snap ring
With the coil removed, the compressor shaft and clutch hub are now visible. Using the appropriate snap ring pliers (external-type for a shaft-mounted ring), carefully remove the snap ring from the groove in the compressor shaft. Take care not to scratch the shaft surface. Keep snap ring in a safe place if reusing, though new clutch kits typically include a replacement.
6
Remove clutch hub and drive plate
With the snap ring removed, grasp the clutch hub firmly and pull it straight off the compressor shaft. If the hub is stuck, use a small puller positioned behind the hub (not on the pulley). The hub and friction drive plate are typically removed as an assembly. Note any shims behind the hub on the shaft and keep them for air gap adjustment during reassembly.
7
Remove clutch pulley and bearing
Remove the pulley retaining bolt from the front of the compressor nose (if equipped with separate retaining bolt). Remove the friction shim from the pulley face if present. Using internal snap ring pliers, remove the pulley retaining snap ring if present. Pull the pulley and bearing assembly straight off the compressor nose. If stuck, use a two or three-jaw puller positioned behind the pulley bearing. Do not hammer or pry on the pulley.
8
Clean and inspect compressor mounting surfaces
With all clutch components removed, thoroughly clean the compressor shaft and nose housing with a lint-free cloth and brake cleaner. Remove all dirt, oil, and corrosion. Inspect the shaft for scoring or damage. Inspect the compressor front seal for signs of refrigerant oil leakage. If leaking, the compressor front seal must be replaced before proceeding. Check that the compressor shaft rotates smoothly by hand.
9
Install new clutch pulley and bearing
Slide the new pulley and bearing assembly onto the compressor nose, ensuring it seats fully against the compressor housing. The bearing should slide on with light hand pressure. Install the pulley retaining snap ring if equipped, ensuring it fully seats in the groove. Verify the pulley spins freely without binding or excessive play.
10
Install clutch hub with initial shim pack
Install the friction shim(s) that were removed earlier onto the compressor shaft. Slide the new clutch hub and drive plate assembly onto the shaft, pressing firmly until it bottoms against the shims. The hub should slide on with moderate hand pressure. If the original shims were damaged or if this is a new clutch kit, start with the shim pack provided in the kit.
11
Secure clutch hub with snap ring
Install the new snap ring (provided with clutch kit or reuse if in good condition) into the groove on the compressor shaft. Use the appropriate snap ring pliers (external-type for a shaft-mounted ring) to install the ring and ensure it fully seats in the groove around its entire circumference. Verify the snap ring is properly seated and the clutch hub cannot pull off the shaft.
12
Measure and adjust clutch air gap
Using a feeler gauge, measure the air gap between the friction face of the pulley and the friction face of the clutch hub at three points approximately 120 degrees apart around the circumference. The gap should meet the OEM/compressor manufacturer specification (commonly in the range of 0.014 to 0.026 inches / 0.35 to 0.65 mm) — verify the exact air gap spec against the factory service manual or compressor manufacturer data before adjusting. If gap is too small, add shims behind the clutch hub. If gap is too large, remove shims. Remove hub snap ring and hub, adjust shim pack, reinstall hub and snap ring, and re-measure until correct gap is achieved. Proper air gap is critical for clutch engagement and longevity.
13
Install AC clutch coil
Slide the clutch coil over the compressor nose and onto the mounting surface. Ensure the coil is properly oriented with the electrical connector in the correct position (typically facing up or toward driver side). Align the coil mounting holes with the compressor housing. Install the coil retaining bolt and tighten to the OEM-specified torque (verify against factory documentation; for a small M6 fastener into aluminum this is typically around 7 ft-lbs / 10 Nm). Do not over-torque as the housing is aluminum.
14
Reinstall serpentine belt
Route the serpentine belt around all pulleys following the belt routing diagram, leaving the tensioner for last. Rotate the tensioner clockwise to create slack, then slip the belt onto the tensioner pulley. Release the tensioner slowly and verify the belt is properly seated in all pulley grooves. Double-check belt routing is correct.
15
Reconnect electrical connector
Reconnect the electrical connector to the AC clutch coil. Ensure the connector clicks and locks securely in place. Verify the connector is not touching hot engine components or moving parts.

Reassembly

Reconnect negative battery cable
Reinstall engine cover if equipped
Have AC system evacuated and recharged to proper R-134a capacity by a certified technician
System must be evacuated for at least 30 minutes to remove moisture before recharging

Verification

Start engine and turn AC system to MAX cooling with blower on high
Listen and visually verify that the AC clutch engages when AC is turned on (you should hear a click and see the clutch hub lock to the pulley)
Verify clutch disengages when AC is turned off (hub should stop spinning while pulley continues)
Check for unusual noises such as squealing, grinding, or clicking which may indicate improper air gap or bearing issues
Using AC manifold gauges, verify system pressures are within specification for ambient temperature
Verify cold air is being produced at the cabin vents
Check for refrigerant leaks at all AC system connections using leak detection equipment
Test clutch engagement and disengagement multiple times to ensure consistent operation
Verify serpentine belt alignment and tension are correct with no belt slippage or noise