3.6L Twin Turbo V6 Engine Complete Assembly for 2014-2019 Cadillac XTS
Product Notes Read before buying
This is the 3.6L TWIN-TURBO engine, also known as the V-Sport model. It fits vehicles with the 8th digit of the VIN as '8'. It will NOT fit the more common, non-turbo 3.6L engine.
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Vsport Platinum | Sedan | 2014 - 2019 | V6 3.6L Turbo | AWD | Automatic |
| Vsport Premium | Sedan | 2014 - 2016 | V6 3.6L Turbo | AWD | Automatic |
| 2015, 2018 |
Know This Engine Before You Buy
The research behind our purchase interview — recalls, bulletins and real install economics for this engine family:
A quick look at your own vehicle makes sure the right engine shows up:
- Check your VIN's 8th Digit: Must be an 8. If it is a 3, your vehicle has the naturally-aspirated 3.6L LFX engine.
- Confirm Your Drivetrain: Verify that your Cadillac XTS is All-Wheel Drive (AWD).
- Verify Engine Orientation: Confirm that your engine is mounted transversely (sideways).
- Prepare for turbo transfer: Verify that your current turbochargers are in good working order.
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- EN-46105 / EN-51333 / EN-48383 Camshaft locking and timing chain retainer tool set
- EN-51332 High-pressure fuel line quick-disconnect release tool
- EN-51365 High-pressure fuel pump installation guide tool
- EN-49245 GM Teflon Seal Sizer
- Vacuum Coolant Refiller
- GM-Compatible Scan Tool (GDS2 / Techline Connect)
Budget for these consumables at install:
- GM Dexos1 Gen 2 or Gen 3 approved full-synthetic 5W-30 motor oil (7.0 quarts / 6.6 liters capacity) and new filter
- GM Dex-Cool coolant (50/50 pre-diluted or mixed with distilled water)
- Six new OE-spec iridium spark plugs
- Upper and lower intake manifold gaskets
- Exhaust manifold gaskets
- Thermostat housing gasket
- Turbocharger oil feed and drain line gaskets/O-rings
- Turbocharger oil feed lines / screens
- New Teflon fuel injector seals (if transferring injectors)
- Timing chain kit (highly recommended: chains, tensioners, and guides)
- One-time-use TTY fasteners (harmonic balancer bolt, flywheel/flexplate bolts, cylinder head bolts)
What your vehicle’s computers will need after the swap:
What’s involved: Security/Immobilizer Relearn (Passlock) and Crankshaft Position (CKP) System Variation Learn
If reusing your vehicle's original Engine Control Module (ECM), no security re-marriage or VIN programming is required, but you must perform a Crankshaft Position (CKP) Sensor Variation Relearn. If replacing the ECM itself, a full security/immobilizer re-marriage and VIN-specific dealer programming are required.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Transverse Block Casting Constraints: Ensure the replacement block is cast for a transverse layout; longitudinal blocks from CTS Vsport will not fit.
- Integrated Intercooler Air Pockets: Must use a vacuum coolant filler to bleed the independent intercooler cooling loop to prevent high intake air temperatures and severe power loss.
- Fragile Turbo Plumbing: Do not bend, twist, or crimp metal oil and coolant feed lines during transfer. Clogged or restricted lines will starve and destroy the turbochargers.
- Oil Cooler Replacement: If the original engine suffered a catastrophic internal failure (like a spun bearing), you must replace the oil cooler and lines to prevent metal shavings from contaminating the new engine.
- Torque-to-Yield (TTY) Fasteners: Must replace TTY bolts with brand-new ones and follow exact GM multi-step angle-torque specifications.
Easy to get right once you know them:
- Ordering for a CTS Vsport: Purchasing an XTS LF3 engine for a CTS Vsport. The blocks, oil pans, accessory brackets, and wiring harnesses are completely different.
- Reusing Clogged Turbo Oil Lines: Reusing old oil feed lines which are often clogged with baked-on carbon, immediately starving and destroying the transferred turbochargers.
- Failing to Perform the CKP Relearn: Skipping the Crankshaft Position variation learn, causing false misfire codes (P0300) and a flashing check engine light.
- Improper Intercooler Bleeding: Attempting to bleed the intercooler cooling circuit without a vacuum tool, leaving air trapped in the intake manifold.
- Using Non-Dexos Approved Oil: Using cheap, conventional, or non-Dexos certified motor oil, leading to rapid carbon buildup and premature timing chain wear.
- Reusing a contaminated oil cooler after a bearing failure, which flushes metal shavings directly into the replacement engine.
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:
🔎 Recommended at install: Replace timing chains, guides, and tensioners. Highly sensitive to oil change intervals.
🔎 Recommended at install: Replace water pump to prevent rapid coolant loss and severe engine overheating.
🔎 Recommended at install: Perform manual carbon cleaning of intake valves.
🔎 Recommended at install: Replace mechanical high-pressure fuel pump.
🔎 Recommended at install: If previous engine failed due to bearing failure, inspect oil control solenoids and replace the oil cooler and lines.
🔎 Recommended at install: Correct routing of the turbo vacuum hoses to prevent wastegate remaining open.
Researched from factory recalls, TSBs and OEM service data (reference unit 300-05837-2440866). Unit-specific details — mileage, condition, warranty, freight — are covered in the checkout interview.
Policies, in plain English.
Shipping & Handling
- Ships by LTL freight on a pallet — a real freight truck, not a parcel van
- Your checkout freight quote covers delivery to your door (liftgate service included for residential addresses)
- The carrier calls ahead to schedule a delivery window — someone must be present to receive it
- Typically palletized and picked up within 2–3 business days; transit time depends on distance
120-Day Warranty
This part includes a 120-day warranty.
- If the part fails within the warranty window, we'll replace it or refund per the coverage terms
- Coverage is parts-only — installation labor is not included
- Warranty covers defects — not installation errors, misuse, or damage after installation
Your pre-purchase interview reviews these exact terms with you before anything is charged.
Returns (30 Days)
We accept returns of uninstalled parts within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
- Return shipping: This part ships by freight (LTL) — the part price is refundable per the terms above, but shipping costs are non-refundable and return freight follows the seller's return terms. Your pre-purchase interview walks through the exact numbers before you buy
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
Damaged in Shipping?
Freight damage is rare — and you're fully protected when you do two things at delivery:
- Inspect before you sign — you're allowed time to look the pallet over while the driver waits
- Write any damage on the delivery receipt before signing — that one line is what makes a freight claim succeed
- Severe damage? Refuse the delivery — it goes back at no cost to you and we make it right
- Photograph the pallet before unwrapping; report concealed damage within 24 hours of delivery
We handle the carrier claim — you just help document it. Your pre-purchase interview walks through this checklist too.
Order Cancellation
Cancel before shipment for a full refund. Once the pallet has been built, a preparation charge may apply — and once the freight carrier picks it up, shipping costs are non-refundable and standard return terms apply. Your pre-purchase interview shows the exact numbers before you pay.
Expert Guides
2014-2019 Cadillac XTS 3.6L V6 LFX: Problems, Identification, and Used Replacement
Identify the naturally aspirated VIN 3 engine, understand timing chain and carbon buildup failures, and learn when to replace it with a used OEM unit.
Read Full Guide →Related Trouble Codes (OBD-II)
6 matching guidesIf your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.
Miscellaneous Information
OEM Part Numbers:
GM: 12649447, 12657118, 12679105
Fits Years: 2014 2015 2016 2017 2018 2019
Your Go-To Place
for auto parts.
In operation since 2007. Trusted by over a million DIYers, mechanics, and body shops across all 50 states.
Confirmed Before It Ships
Every freight order is confirmed through a short guided interview — fitment, condition, delivery and warranty terms, e-signed before you're charged.
Trusted Since 2007
Nearly two decades of shipping parts to professionals & enthusiasts.
Backed By The Selling Yard
This unit ships with the selling yard's 120-day warranty. Longer plans can be requested during checkout.
What buyers are saying.
Racing Partner Videos
