3.6L V6 Hybrid Engine Complete Assembly for 2017-2025 Chrysler Pacifica

A quick look at your own vehicle makes sure the right engine shows up:

• Verify the 8th digit of the VIN is '7'.
• Confirm the vehicle is Front-Wheel Drive (FWD) only.
• Scan the vehicle to ensure there are no pre-existing faults with the Power Inverter Module (PIM) or the eFlite transmission (such as code P0A43).

What the install really takes — plan and budget with confidence:

Special tools this job needs:

• Class 0 insulated gloves (rated for 1,000V)
• CAT III/IV digital multimeter
• Miller Special Tools 10242B / Mopar 10242 (Engine Lifting Brackets)
• Mopar 10200A / 10202A (Camshaft/Timing Tool Kit)
• Vacuum Coolant Refilling Tool
• Dealer-level diagnostic scan tool (wiTECH 2.0)

Budget for these consumables at install:

• 5.0 quarts of 0W-20 full-synthetic oil (meeting Chrysler MS-6395 specifications) or 5W-20/5W-30 full-synthetic oil depending on year specification
• Premium oil filter with strong anti-drainback valve
• Mopar OAT (Organic Additive Technology) 50/50 Pre-Mixed Coolant (spec MS.90032 / MS-12106)
• Upper and lower intake manifold plenum gaskets
• Exhaust manifold gaskets
• Thermostat housing gasket / Thermostat
• Water pump (recommended preventative maintenance)
• 6 new OE-spec spark plugs (Champion or NGK Iridium)
• Torque-to-yield (TTY) cylinder head bolts (if removed)
• Harmonic balancer bolt (if removed)

What your vehicle’s computers will need after the swap:

What’s involved: Crankshaft Position (CKP) Sensor Relearn, clearing of high-voltage interlock codes, Powertrain Control Module (PCM) / Hybrid Control Processor (HCP) alignment, and security re-marriage.

A Chrysler-compatible J2534 pass-thru device and a wiTECH 2.0 software subscription are required to program the modules and link the replacement engine's components to the vehicle's security system. The vehicle will not start or will remain in a safety lockout/limp mode until completed.

Pro tips for a smooth first start-up — hand them to whoever does the install:

• High-Voltage Disconnect: Must locate and pull the High-Voltage Service Disconnect plug under the second-row floor panel to de-energize the hybrid battery, and verify zero voltage with a CAT III/IV multimeter before touching mechanical components.
• Timing Cover Removal for Head Gaskets: The rear (right) cylinder head cannot be removed without removing the timing cover because a critical timing chain guide Torx bolt is physically blocked by the cover.
• Multi-Loop Cooling System: The vehicle features three independent cooling loops (engine, battery pack, and PIM). You must vacuum-fill and bleed all three loops. Traditional funnel bleeding will leave air pockets, causing localized hot spots, head gasket failure, or hybrid system shutdown codes.
• Lifting Brackets: You must use dedicated Pentastar engine lifting brackets (Miller 10242B / Mopar 10242). Lifting with universal chains bolted to the heads can crack plastic valve covers, the oil cooler housing, or VVT solenoids.
• Oil Cooler Housing Inspection: Proactively inspect and consider replacing the factory plastic oil filter/cooler housing with an aftermarket aluminum upgrade before installation due to high failure rates.

Easy to get right once you know them:

• Buying for a Non-Hybrid Pacifica: Ordering a hybrid engine (VIN 7) for a standard gasoline Pacifica (VIN G). They are physically and electronically incompatible.
• Reusing Rear Spark Plugs and Ignition Coils: Failing to replace these while the engine is out, leading to extremely difficult access and duplicate labor if a misfire develops later.
• Skipping the Vacuum Coolant Fill: Attempting to fill the cooling system using a standard gravity funnel, which traps air and triggers a 'Service Hybrid System' lockout.
• Failing to Transfer the Original Harness: Not transferring the original wiring harness and sensors, leading to communication codes and electrical gremlins.
• Reusing the Old Oil Cooler: Transferring a worn plastic oil filter/cooler assembly instead of upgrading to a new aluminum unit.
• Skipping the PCM/ECU Programming: Assuming the engine is plug-and-play without performing the required wiTECH programming and security synchronization.

Not issues with the units on this page — the manufacturer documented these for every engine of this family, wherever you buy one. Handy for your installer: