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Choosing the right intake manifold for your Buick Enclave can noticeably affect engine breathing, throttle response, and long-term reliability. The wrong unit may cause poor idle, reduced power, or recurring vacuum leaks, so picking a well-made manifold that fits correctly matters for everyday driving and maintenance. This guide presents seven shortlisted Buick Enclave intake manifolds selected for their fitment, construction, and expected durability. We evaluated each option using common real-world criteria such as material quality and sealing reliability, and explain what to look for so you can pick the best match for your needs.
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Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | GM Genuine Parts Intake Manifold Kit (12637620) |  |
| Most Popular A crowd favorite that many people choose with confidence | Dorman 615-180 Intake Manifold |  |
| Best Quality Built to a higher standard if you want something more solid | GM Genuine Parts 12638038 Intake Manifold Assembly |  |
| Best Budget The cheapest option that still gets the job done reliably | Fel-Pro MS 97240-1 Intake Manifold Gasket Set |  |
| Most Sold A high-volume bestseller chosen again and again | Dorman 615-380 Intake Manifold with Gaskets (Improved PCV Retention) |  |
| Best Value for Money The sweet spot between price and what you get | A-Premium V6 3.8L Upper Intake Manifold with Gasket |  |
| Best Overall The best all-around choice for most situations | Dorman 615-380KIT Intake Manifold and Valve Cover Kit |  |
1. GM Genuine Parts Intake Manifold Kit (12637620)
| Manufacturer | ACDelco |
|---|---|
| Brand | GM GENUINE PARTS |
| Model | Intake Manifold Kit |
| Item model number | 12637620 |
This GM Genuine Parts intake manifold kit is a factory-quality replacement designed to restore proper air and mixture distribution to a GM engine. It ships with the manifold plus gaskets, seals, the required sensor, and mounting bolts so you can swap the unit during a repair without hunting for additional parts. For Buick Enclave owners focused on reliability, the key advantage is a direct-fit, factory-validated component engineered to meet GM fit, form, and function expectations, which reduces the risk of fitment headaches and vacuum leaks after installation. Real-world notes from users show consistent fit on GM 2.4L applications and that checking the PCV and vacuum ports during install can prevent issues like hard brakes due to blocked passages. Expect a straightforward replacement job for a competent DIYer or technician, though a few installers reused existing studs and nuts rather than replacing them. If your Enclave needs a dependable, factory-grade manifold to resolve leaks or restore performance, this kit covers the basics without surprises.
Best for: Reliability-focused buyers who prioritize factory-quality, direct-fit components to minimize rework and avoid repeat repairs on their Buick Enclave.
Less Ideal for: Buyers seeking a low-cost temporary fix or those wanting performance-tuned aftermarket manifolds for power gains should consider other options.
- Factory-quality GM Genuine Parts construction for direct-fit replacement
- Includes gaskets, seals, sensor, and mounting bolts for a more complete repair
- Manufactured to GM specifications to minimize fitment and vacuum-leak risks
- Positive owner reports of correct fit and restored function on GM 2.4L applications
- Does not include intake manifold studs and nuts that some installations may require
- PCV/vacuum passages may need inspection or minor modification during install to ensure proper vacuum function
Verdict Choose this GM Genuine Parts intake manifold kit for a reliable, factory-validated replacement that minimizes fitment risk on your Buick Enclave.
2. Dorman 615-180 Intake Manifold
| Manufacturer | Dorman Products |
|---|---|
| Manufacturer Part Number | 615-180 |
| Automotive Fit Type | Vehicle Specific Fit |
| Position | Center |
This Dorman 615-180 is an aftermarket intake manifold designed as a vehicle-specific replacement for compatible GM 3800-series applications. It replaces the upper intake assembly and includes many of the small parts and gaskets installers typically need, which simplifies a multi-step repair. In use it restores proper sealing around intake runners and injector seals, which helps stop coolant and vacuum leaks that cause overheating or rough idle. The molded construction is machined at mounting points for a factory-quality fit, and many owners report straightforward installation with common hand tools. Watch for a few quality-control issues reported by some users, such as minor flashing or the need to smooth mating surfaces before final installation, and follow torque procedures carefully to avoid stress-related cracking. Instructions are minimal, so pairing the part with a shop manual or video walkthrough is recommended. For a convenience-focused buyer looking to replace a failing intake assembly, this part reduces parts sourcing and gets the engine back to reliable operation with fewer visits to parts counters.
Best for: Convenience-driven buyers who prioritize a single replacement unit that comes with most installation parts and reduces trips for missing pieces.
Less Ideal for: Those seeking an upgraded performance manifold or a custom-fit aftermarket tuned for the Buick Enclave should consider alternatives designed specifically for performance gains.
- Vehicle-specific design intended to match original fit and mounting points
- Includes many required gaskets and small parts to simplify the repair
- Machined mounting surfaces for a closer factory-quality fit
- Durable construction tested for OEM-style performance and reliability
- Instructions are sparse, so additional installation guidance is often needed
- Some units have required minor surface sanding or adjustment for a perfect seal
- A few reports of cracking if final torque steps are not carefully managed
Verdict A convenient, largely complete replacement intake manifold that gets a worn unit sealed again, but installers should be prepared to verify mating surfaces and follow careful torque steps.
3. GM Genuine Parts 12638038 Intake Manifold Assembly
| Brand | GM GENUINE PARTS |
|---|---|
| Manufacturer | ACDelco |
| Exterior | Machined |
| Manufacturer Part Number | 12638038 |
This GM Genuine Parts intake manifold is a factory-quality replacement intended to restore or maintain the engine's designed air flow on compatible GM V6 applications. Typical use is direct replacement during engine service or performance rebuilds where you want OEM fit and predictable flow characteristics. The machined exterior and GM validation mean the unit matches factory porting and mounting locations, which simplifies installation on stock-engine Buick Enclave setups and reduces the need for modifications. Reviews note the manifold supports higher air flow and fits as expected, making it useful for naturally aspirated and mildly boosted applications when paired with supporting parts. Buyers should know the manifold does not include small ancillary pieces such as the MAP sensor retainer clip or throttle body O-ring, so plan to source those separately. Also this part is a direct factory-style component rather than a high-flow aftermarket race manifold, so gains are stability and compatibility rather than large peak-power increases.
Best for: Performance-oriented buyers who prioritize factory-quality fit and predictable engine behavior when repairing or modestly upgrading a Buick Enclave engine.
Less Ideal for: Owners seeking maximum aftermarket flow gains or racers chasing large peak horsepower should consider purpose-built performance manifolds instead.
- Factory-validated design ensures correct fit and mounting for compatible GM engines
- Machined exterior and factory porting for consistent airflow and installation ease
- Supports increased airflow vs older or worn manifolds, useful for modest performance upgrades
- Backed by GM Genuine Parts lineage for predictable durability and part traceability
- Does not include some small hardware like the MAP sensor retainer clip or throttle body O-ring
- Not a high-flow aftermarket performance manifold so it will not deliver large peak horsepower gains
Verdict Choose this GM Genuine intake manifold when you want factory-quality fit and reliable airflow on a Buick Enclave rather than aggressive aftermarket power gains.
4. Fel-Pro MS 97240-1 Intake Manifold Gasket Set
| Brand | Fel-Pro |
|---|---|
| Model | MS 97240-1 |
| Manufacturer Part Number | MS972401 |
This Fel-Pro intake manifold gasket set is a budget-focused replacement designed to restore proper sealing between the intake manifold and cylinder heads on compatible GM V6 engines. The kit includes all the gaskets and components needed for a typical intake manifold repair and uses Fel-Pro's PermaDryPlus molded rubber over an aluminized steel carrier to resist heat and conform to imperfect sealing surfaces. In practice this means easier alignment during installation thanks to locating tabs and reduced need for additional sealants, which simplifies a DIY or shop repair. Real-world testing and torque limiters help prevent over-tightening and gasket damage during reassembly. Limitations are that fitment is application-specific so you must confirm it matches the Buick Enclave engine year/engine option before ordering, and as a repair-oriented aftermarket part it may not match a factory part's exact material finish in every detail. For routine intake gasket replacement where cost matters, this set gives a capable, serviceable solution.
Best for: Budget-conscious owners looking to replace a leaking intake manifold gasket on a Buick Enclave who prioritize a complete, easy-to-install repair kit over exact factory-matching components.
Less Ideal for: Owners seeking an exact factory-identical part or those with uncommon engine variants who prefer dealer-sourced components should consider alternatives.
- Includes every part needed for a typical intake manifold repair
- PermaDryPlus molded rubber over aluminized steel carrier resists heat and conforms to imperfect surfaces
- Locating tabs and torque limiters simplify alignment and reduce risk of overtightening
- Designed and validated through on-vehicle testing for road use
- Fitment is application-specific and requires verification for Buick Enclave engine variants
- Aftermarket materials and finish may differ slightly from factory-quality parts
Verdict A cost-conscious, complete intake manifold gasket kit that simplifies Buick Enclave repairs while requiring careful fitment verification.
5. Dorman 615-380 Intake Manifold with Gaskets (Improved PCV Retention)
| Automotive Fit Type | Vehicle Specific Fit |
|---|---|
| Manufacturer | Dorman Products |
| Exterior | Ready To Paint If Needed |
| Position | Center |
| Model | Dorman 615-380 |
This Dorman intake manifold is a direct-fit replacement designed to address a common PCV valve failure that can lead to oil consumption and check-engine codes. It installs in place of the factory unit and includes a throttle body gasket, port gaskets, fuel injector O-rings, MAP sensor O-ring and mounting screws so you have the parts needed for a standard service. The notable improvement is a retaining pin behind the PCV valve that prevents the valve from dislodging, which users report reduces repeat valve cover failures and oil leaks. Made from a reinforced nylon polymer and manufactured in the United States, the manifold resists cracking that can occur with older factory parts. Expect a straightforward swap for a competent DIYer or professional; some owners recommend replacing the valve cover or related vent hose at the same time if they are already damaged. This part solves a specific chronic issue but does not change engine performance beyond restoring proper crankcase ventilation, and full repair may require addressing other worn components during installation.
Best for: Risk-averse mainstream buyers looking for a proven, vehicle-specific repair that fixes a recurrent PCV-related oil consumption problem without experimental modifications.
Less Ideal for: Buyers seeking performance upgrades or aftermarket tuning parts should look elsewhere; this is a like-for-like replacement focused on reliability rather than power gains.
- Redesigned PCV retention to prevent valve dislodgement and reduce oil consumption.
- Includes gaskets, injector O-rings, MAP sensor O-ring and screws for a more complete installation.
- Vehicle-specific fit that bolts up as a direct replacement for confirmed models.
- Manufactured from nylon polymer to resist cracking and warping compared with older units.
- Does not address damaged valve cover or vent hoses which may also need replacement.
- Some kits may have incomplete injector O-ring quantities for certain service approaches.
Verdict A practical, improved replacement for Buick Enclave intake manifolds that targets a known PCV failure to stop oil consumption and related issues.
6. A-Premium V6 3.8L Upper Intake Manifold with Gasket
| Engine fitment | V6 3.8L |
|---|---|
| Port quantity | 6 |
| Type | Single plane |
| Gasket included | Yes |
| Material | Plastic |
This A-Premium upper intake manifold is an aftermarket replacement intended to restore air delivery on V6 3.8L GM engines. It arrives with the gasket set and several auxiliary pieces so you can swap the failed factory part without hunting for extras. The part is injection-molded plastic and uses a single-plane design with six ports, so installation and routing match the original layout and it is used in routine engine repairs where vacuum integrity and smooth airflow matter. In practice buyers report solid fits and cured idle and acceleration issues when mating surfaces are cleaned and a bead of RTV is applied where recommended. Quality is mixed: many owners get a reliable, budget-friendly repair, while some have found thin material or mis-machined openings that required additional fabrication or reuse of factory components. That variability means this manifold is a cost-effective fix when you want to avoid a used OEM unit, but expect to inspect fitment carefully and be prepared to address small fit or reinforcement issues during installation.
Best for: Practical owners prioritizing a low-cost, functional repair who want to get a 3.8L V6 back on the road quickly while accepting hands-on inspection and minor adjustments.
Less Ideal for: Users seeking a direct-forget replacement with guaranteed factory-strength materials or those unwilling to modify or troubleshoot fitment during installation.
- Includes gasket kit and multiple seals for a more complete replacement
- Matches factory single-plane, six-port layout for straightforward installation
- Smooth inner-wall design intended to improve air flow and reduce stalling
- Widely reported as a budget-friendly option that restores idle and acceleration for many users
- Made from softer plastic than some factory manifolds, which can require careful bolt sequencing or reinforcement
- Occasional quality-control issues such as improperly machined ports or missing small caps that may need modification or reuse of OEM pieces
Verdict A budget-friendly replacement that often restores performance for 3.8L V6 engines but may require careful fit inspection and occasional minor fixes.
7. Dorman 615-380KIT Intake Manifold and Valve Cover Kit
| Material | Metal |
|---|---|
| Inlet Connection Type | positive crankcase ventilation |
| Outlet Connection Type | PCV |
| Number of Ports | 1 |
This Dorman kit bundles a redesigned intake manifold with a matching valve cover and PCV tube to address the failure mode found on GM 1.4L Ecotec engines. It is typically used as a direct replacement when the factory intake check valve or PCV system has failed and is most useful during a repair to stop oil consumption, rough idle, and related fault codes. Notable features include a revised manifold design meant to prevent the check valve failure that damages valve cover components and a complete three-piece kit so you do not need to source separate parts. The practical benefit is a one-purchase repair that often clears check-engine codes and restores normal vacuum and oil control. Installation is straightforward for a competent DIYer and many users report fast resolution of symptoms. Limitations include some plastic mounting areas that use self-threading hardware rather than metal inserts and the kit applies to the GM 1.4L Ecotec fitment list, so confirm compatibility with your specific Buick trim before ordering.
Best for: Balanced owners who want a single, factory-replacement style solution to fix a known PCV-related defect and prefer a practical, do-it-once repair that addresses all affected components.
Less Ideal for: Drivers looking for performance upgrades or parts for engines other than the GM 1.4L Ecotec should consider alternative manifolds or solutions tailored to those goals.
- Includes intake manifold, valve cover, and PCV tube for a complete repair in one kit
- Redesigned intake manifold aimed at preventing the common PCV check valve failure
- Reported to resolve related check-engine codes and symptoms like rough idle and high oil consumption
- Generally straightforward to install for DIYers with common hand tools
- Some mounting points rely on self-tapping screws into plastic rather than metal threaded inserts
- Fitment is specific to GM 1.4L Ecotec applications so it is not universal across Buick engines
Verdict A practical, all-in-one replacement kit that fixes a known intake/PCV design flaw on GM 1.4L Ecotec engines and saves the trouble of sourcing separate parts.
Choosing the Right Buick Enclave Intake Manifold: Key Factors to Consider
Fitment And Exact Match
Correct fitment is the baseline requirement for any Buick Enclave intake manifold. A direct-fit manifold aligns with intake ports, bolt holes, sensor bosses, and coolant passages, which reduces installation time and prevents clearance issues. Poor fit can lead to airflow disruptions, difficulty installing throttle bodies or sensors, and stress on mounting hardware.
When you prioritize exact match components you avoid the need for adapter plates or gasket modifications. Confirming fitment also reduces the risk of vacuum leaks and ensures the manifold seals properly against the cylinder head. Fit matters not only for initial installation but for reliable long-term operation.
Material And Thermal Stability
Intake manifolds must withstand engine bay heat cycles without warping or cracking. Materials commonly used include reinforced composites and heat-resistant polymers, which offer a good balance of weight savings and thermal stability. Metal manifolds can be strong but may transmit heat into the intake charge, affecting air density.
Choose a manifold material that resists deformation and thermal fatigue to maintain a consistent seal and predictable airflow. Durable materials also stand up better to the stresses of repeated removal during maintenance and reduce the chance of developing small leaks over time.
Sealing Surface And Gasket Compatibility
The quality of the sealing surface and compatibility with the correct intake manifold gasket are crucial to prevent vacuum and coolant leaks. Flat, smooth flange surfaces and well-defined gasket grooves help distribute clamping force evenly across the mating surface. Irregularities or thin flange sections can concentrate stress and lead to leaks.
Confirm that the manifold is designed to accept the proper gasket type used on Buick Enclave engines. Good gasket compatibility minimizes the need for sealant and reduces the chance of repeated failures. Proper sealing affects idle quality, fuel trim, and emissions system performance.
Port Design And Airflow Efficiency
Port shape and runner length influence how smoothly air flows into the intake ports and cylinders. Well-designed ports reduce turbulence, encourage even distribution between cylinders, and can improve throttle response. For stock-replacement needs, maintaining similar port volume and shape to the original design helps preserve drivability.
If you plan modest performance tuning, consider port profiles that support slightly higher flow without sacrificing low-end torque. However, major deviations from the factory port design can complicate fitment and require additional tuning of fuel and ignition systems.
Resistance To Carbon Buildup And Serviceability
Over time, intake manifolds can accumulate carbon and oil residue that restricts airflow and degrades performance. Manifolds with smoother internal surfaces and fewer trapped cavities are easier to clean and less prone to build-up. Consider designs that allow access for intake manifold cleaning without extensive disassembly.
Serviceability also covers how easily sensors, EGR passages, and vacuum lines can be accessed. A manifold that simplifies routine maintenance reduces labor time and the chance of causing damage during service.
Mounting Hardware And Torque Requirements
Correct mounting hardware and torque specifications are important to achieve a uniform seal and avoid distortion. Manifolds designed for the Buick Enclave should use the proper bolt pattern and recommend torque sequence to ensure even clamping across the flange. Over- or under-torquing fasteners can lead to leaks or cracked housings.
Verify that required torque specs and sequences are documented or available, and that replacement hardware is compatible with factory threads. Proper fasteners help maintain gasket compression and long-term reliability.
FAQ
How can I tell if my Buick Enclave intake manifold has a vacuum leak?
Common signs include a rough or fluctuating idle, reduced throttle response, and a check engine light with related codes. You may also notice hissing sounds from the engine bay. A controlled vacuum leak diagnosis typically starts with a visual inspection of gaskets and vacuum lines, followed by smoke or pressure testing to locate leaks.
Can I reuse the old gasket when replacing the intake manifold?
It is usually best to replace the intake manifold gasket whenever the manifold is removed. Old gaskets can compress or deteriorate and may not reseal effectively. Using a new gasket helps ensure a reliable seal and reduces the risk of future vacuum or coolant leaks.
What maintenance helps prevent intake manifold problems?
Regular inspection of gaskets, vacuum hoses, and mounting bolts helps catch early issues. Periodic intake manifold cleaning can reduce carbon buildup, especially if the engine suffers from oil blow-by or evaporative system deposits. Addressing small leaks or degraded components promptly prevents larger failures.
Do intake manifold torque specs vary for different Buick Enclave engines?
Torque specs and tightening sequences can vary with engine design and manifold type. It often depends on the engine year and the specific manifold flange design. Always consult factory service information or a reliable repair manual for the correct torque values and sequence for your Buick Enclave engine.
Is it worth upgrading the intake manifold for performance?
Upgrading can yield benefits if the new design improves airflow without introducing fitment or tuning issues. For most users, modest gains require careful selection to preserve low-end drivability. Performance upgrades may also require supporting modifications and updated engine management to realize their potential.
How We Chose the Best Buick Enclave Intake Manifold
To assemble this list we applied practical, Buick Enclave-specific filters and technical criteria relevant to intake manifolds. We prioritized exact OEM or direct-fit replacement designs to ensure proper alignment with intake ports, mounting bosses, and sensor locations. Material and construction were evaluated to favor units that resist heat and warping, such as reinforced composites and heat-stable polymers. Sealing performance was assessed by looking at flange flatness and gasket interfaces to reduce the likelihood of vacuum leaks and coolant crossover issues. Ease of installation was considered by checking bolt pattern consistency, accessibility of mounting points, and whether common maintenance tasks require manifold removal. We also weighed long-term serviceability factors like resistance to carbon buildup and compatibility with standard intake manifold gasket designs. Exclusions: we did not include universal or modified manifolds that require custom fabrication, or items that omit full-fitment information for the Buick Enclave. The final picks balance fit, durability, sealing, and practical installability.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing an intake manifold for a Buick Enclave, prioritize exact fitment, robust sealing surfaces, and materials that resist heat and deformation. Consider port design, gasket compatibility, and how easily the manifold can be serviced, since these factors affect drivability and long-term reliability. Be mindful of tradeoffs between airflow improvements and everyday performance. Focus on options that match the engine s physical layout and document torque requirements to reduce the risk of leaks and installation issues.
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