🔧 Sequoia - A/C Compressor Replacement

Replacing the A/C compressor on your Sequoia requires safely recovering the refrigerant, removing the drive belt, swapping the compressor and O-rings, then vacuuming and recharging the system. The exact fastener torque specs and the correct oil amount depend on the exact A/C configuration and what failed.

Difficulty Level: Advanced | Estimated Time: 3-6 hours

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⚠️ Safety & Precautions

• ⚠️ Refrigerant must be recovered with proper equipment; venting to atmosphere is unsafe and not allowed.
• ⚠️ Keep hands/tools clear of the belt and fan; work with the engine OFF and cool.
• ⚠️ Wear eye protection; refrigerant/oil can cause severe eye injury.
• ⚠️ Disconnect the battery negative terminal before unplugging A/C electrical connectors.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Wheel chocks
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Metric socket set (8mm-19mm)
• 3/8" drive ratchet
• 1/2" drive breaker bar
• Torque wrench (10-150 ft-lbs)
• Serpentine belt tool (specialty)
• Trim clip removal tool
• Pick set
• Line/crowfoot wrench set (metric) (specialty)
• A/C manifold gauge set for R-134a (specialty)
• Refrigerant recovery machine for R-134a (specialty)
• Vacuum pump (specialty)
• Refrigerant scale (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• A/C compressor (with clutch/pulley as supplied) - Qty: 1
• A/C compressor O-ring set (suction/discharge) - Qty: 1
• ND-OIL 8 (PAG) A/C compressor oil - Qty: 1
• R-134a refrigerant - Qty: 1 (system charge by spec)
• Serpentine drive belt - Qty: 1 (optional if worn/cracked)
• Receiver/drier or condenser assembly (if system contaminated) - Qty: 1 (conditional)
• Expansion valve (if system contaminated) - Qty: 1 (conditional)

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the rear wheels.
• Have the refrigerant professionally recovered, or use a proper recovery machine (it pulls refrigerant into a storage tank).
• Disconnect the battery negative terminal using a 10mm socket.
• Confirm you have the factory refrigerant charge spec for your Sequoia (it must be charged by weight, using a refrigerant scale).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Recover the refrigerant

• Connect the A/C manifold gauge set for R-134a (specialty) to the high and low service ports.
• Recover the refrigerant using the refrigerant recovery machine for R-134a (specialty) until both gauges show zero pressure.

Step 2: Raise and access the front underside

• Lift the front using a floor jack (rated 3-ton minimum) and support with jack stands (rated 3-ton minimum).
• Remove the needed splash shields using a trim clip removal tool and metric socket set (8mm-19mm).

Step 3: Remove the drive belt from the A/C compressor

• Relieve belt tension using a serpentine belt tool (specialty) and slide the belt off the compressor pulley.
• Take a photo of belt routing.

Step 4: Disconnect compressor electrical connector

• Unplug the compressor connector by hand; use a pick set only if the tab is stuck.

Step 5: Remove A/C lines from the compressor

• Place rags under the fittings.
• Remove the suction and discharge line fasteners using a metric socket set (8mm-19mm) or line/crowfoot wrench set (metric) (specialty) as needed.
• Remove and discard the old O-rings using a pick set.
• Torque to XX Nm (YY ft-lbs)

Step 6: Unbolt and remove the compressor

• Support the compressor by hand.
• Remove the mounting bolts using a metric socket set (8mm-19mm) and 3/8" drive ratchet.
• Lower the compressor out carefully.
• Torque to XX Nm (YY ft-lbs)

Step 7: Prepare and install the new compressor

• Compare the old and new compressor ports/brackets to confirm a match.
• Add the correct amount of ND-OIL 8 (PAG) A/C compressor oil (oil quantity depends on what parts were replaced and how the old compressor failed).
• Install the compressor and hand-start all bolts, then tighten with a torque wrench (10-150 ft-lbs).
• Torque to XX Nm (YY ft-lbs)

Step 8: Install new O-rings and reconnect A/C lines

• Lightly coat new O-rings with ND-OIL 8 (PAG) A/C compressor oil.
• Install O-rings, seat the lines squarely, then tighten fasteners using a torque wrench (10-150 ft-lbs).
• Torque to XX Nm (YY ft-lbs)

Step 9: Reinstall the belt and shields

• Route and reinstall the belt using a serpentine belt tool (specialty).
• Reinstall splash shields using a trim clip removal tool and metric socket set (8mm-19mm).

Step 10: Evacuate (vacuum) and recharge by weight

• Pull vacuum using a vacuum pump (specialty) through the A/C manifold gauge set for R-134a (specialty) (this removes air/moisture).
• Verify it holds vacuum (no leaks).
• Recharge with R-134a refrigerant using a refrigerant scale (specialty) to the factory-specified weight.

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✅ After Repair

• Reconnect the battery negative terminal using a 10mm socket.
• Start the engine and turn A/C to MAX; confirm the compressor engages and vent air gets cold.
• Check for leaks at the compressor line fittings.
• If cooling is weak or pressures are abnormal, stop and recheck charge amount and leaks.

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💰 DIY vs Shop Cost

Shop Cost: $1,200-$2,500 (parts + labor)

DIY Cost: $350-$1,200 (parts only)

You Save: $850-$1,300 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-6 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.

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I need 2 quick details to give you the exact, torque-spec-accurate procedure:

• ❓ Did the old compressor seize/grind or shed metal (or did it just leak / won’t engage)?
• ❓ Are you planning to DIY the evacuate & recharge with a recovery machine + vacuum pump, or will a shop handle the refrigerant service?