GM 12599722 Sts Right Passenger Cylinder Head Camshafts 3.6L V6

( Brand: Gm ), ( Manufacturer Part Number: 12599722 ), ( Type: Cylinder Head ), ( Material: Aluminum ), ( Performance Part: No ), ( Manufacturer Warranty: 1 Month )

Review GM Cadillac Sts 3.6l V6 Right Passenger Cylinder Head Camshafts fits SRX CTS 2007–2009

The **GM 12599722 OEM replacement cylinder head camshafts** are precision-engineered components designed exclusively for the **2007 2009 Cadillac SRX, CTS, and STS models** equipped with the **3.6L Northstar V6** (L36 engine code). These high-performance camshafts are manufactured to exacting General Motors specifications, ensuring seamless integration with the Northstar s advanced dual overhead camshaft (DOHC) valve train, which delivers the iconic smoothness and responsiveness synonymous with this legendary powertrain. Crafted from high-grade alloy steel, these camshafts feature meticulously machined lobes optimized for the Northstar s **variable valve timing (VVT)** system, allowing for precise control over intake and exhaust valve lift and duration. The design incorporates **hydrodynamic bearings** for smooth operation under high RPM loads, while the **precision-ground lobes** enhance airflow efficiency, contributing to the engine s signature blend of torque and refinement. Whether restoring original performance in a classic Northstar application or upgrading an existing build, these OEM camshafts provide the reliability and performance expected from Cadillac s premium lineup, ensuring a seamless fit with the engine s internal components, including the rocker arms, lifters, and valve springs. Ideal for both professional mechanics and enthusiasts seeking authentic GM quality, these parts are a critical component for maintaining or restoring the **3.6L Northstar s** legendary balance of power and elegance.

### **Pros and Cons of Buying Used GM 12599972 (2007 2009 Cadillac SRX, CTS, STS 3.6L V6) Right-Passenger Cylinder Head and Camshaft**

1. **Common and Widely Available Parts** The 3.6L Northstar V6 is a well-documented engine, meaning replacement parts (including cylinder heads and camshafts) are readily available from aftermarket suppliers, OEM dealers, and salvage yards. This reduces long wait times and ensures compatibility.

2. **Proven Reliability (When Maintained)** The 3.6L Northstar is known for its smooth operation, balanced power delivery, and durability when properly maintained. Many examples with regular oil changes, coolant flushes, and valve adjustments last well beyond 100,000 miles.

3. **High-Quality Aftermarket Support** Due to its popularity, aftermarket upgrades (e.g., performance camshafts, upgraded valve springs, or head studs) are plentiful. This allows for tuning and modifications if desired.

4. **Potential for Long-Term Use** If the engine has been well-maintained, the cylinder heads and camshafts may have significant remaining life. A fresh set of camshafts and a rebuilt head can extend the engine s lifespan by another 100,000 miles.

5. **Lower Cost Compared to New Engines** Replacing just the camshafts and head (rather than a full engine swap) is significantly cheaper than buying a new or remanufactured engine, making it a cost-effective solution for owners on a budget.

6. **Compatibility Across Models** The 3.6L Northstar is shared across multiple Cadillac models (SRX, CTS, STS) and some Buick (Encore, Lucerne) and Chevrolet (Impala, Caprice) vehicles, increasing the pool of available parts.

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- **Warped or cracked heads** (common in high-mileage examples due to overheating or poor maintenance).

- **Worn or pitted camshaft lobes** (leading to valve train noise, poor performance, or premature failure of valve springs).

- **Leaking or damaged head gaskets** (if the head has been previously damaged, it may require machining or replacement).

- **Exhaust valve stem seal leaks** (a common issue that causes oil consumption and blue smoke).

- Disassembling the intake/exhaust manifolds.

- Removing the timing chain and tensioners (critical to avoid stripping bolts or damaging the chain).

- Properly torquing head bolts in sequence (over-torquing can warp the head).

- Adjusting valve lash (critical for smooth operation).

This is a job best left to a mechanic with experience on Northstar engines.

3. **Risk of Counterfeit or Low-Quality Parts** Some aftermarket camshafts and heads may be poorly machined or made from subpar materials, leading to premature wear or failure. Always source parts from reputable suppliers (e.g., **Northstar Performance, JE, or OEM-equivalent remanufacturers**).

4. **Timing Chain Wear** The 3.6L Northstar uses a timing chain (not a belt), which can stretch or jump teeth over time, causing catastrophic engine damage if it fails. Replacing the chain and tensioners at the same time as the camshafts is highly recommended.

5. **Valvetrain Noise Potential** If the camshafts are worn, they can cause a rattling or tapping noise, especially at idle. This is often mistaken for a timing chain issue but requires inspection of the camshafts, lifters, and pushrods.

6. **Potential for Overheating** The Northstar is prone to overheating if the cooling system is neglected. A fresh head gasket and thermostat should be installed to prevent future issues.

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- Oil leaks around the head or camshaft area.

- Exhaust valve stem seal leaks (oil on the exhaust manifold).

- Valvetrain noise (ticking, rattling, or clicking).

- Coolant leaks (indicating a potential head gasket or water pump issue).

- **Check Maintenance Records** Confirm the engine has had regular oil changes (synthetic recommended), coolant flushes, and valve adjustments.

- **Test Drive for Smoothness** The engine should run smoothly without hesitation, knocking, or unusual noises.

- **Budget for Additional Work** If buying used parts, factor in labor costs for installation (especially if the chain and tensioners need replacement).

- **Consider a Rebuilt Head vs. New** A professionally rebuilt head (e.g., from **Northstar Performance**) may be more cost-effective than a brand-new one, depending on the condition.

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Buying used **right-passenger cylinder heads and camshafts** for a 2007 2009 Cadillac 3.6L V6 can be a **cost-effective solution** if the engine is otherwise in good condition and the parts are sourced responsibly. The engine s reputation for reliability makes it a strong candidate for restoration, but **only if the underlying issues (head warpage, camshaft wear, timing chain condition) are addressed**.

- Purchase **high-quality used or remanufactured camshafts and heads** from a trusted supplier (e.g., **Northstar Performance, JE, or an OEM remanufacturer**).

- Replacing the **timing chain and tensioners** (if worn).

- Checking for **head warpage** (requires a warpage test).

- Ensuring **proper valve lash adjustment**.

- Consider **upgrading valve springs** if the engine is high-mileage to prevent valve float.

- **Avoid purchasing used parts without inspection** opt for **new or remanufactured components** to prevent future problems.

- If the head is warped or cracked, **machining or replacement** may be necessary, adding to costs.

- If restoring the vehicle, **prioritize the cooling system, timing chain, and valvetrain** alongside the head and camshafts.

- Consider **performance upgrades** (e.g., upgraded camshafts, intake/exhaust) if the engine is being rebuilt for longevity or performance.

Buying used **right-passenger cylinder heads and camshafts** is **viable if the engine is in decent shape and the parts are inspected or new**. However, **cutting corners on labor or part quality can lead to costly failures**. For the best results, **work with a mechanic experienced in Northstar engines** and **source parts from reputable suppliers**. If unsure, **prioritize a full engine inspection** before committing to a purchase.

Details:

Shipping, Free shipping is only valid on items you keep. Condition: Used Clean Inspected Brand: Genuine GM OEM Side: Right Passenger Side / Bank 1 Engine: 3.6L V6 LY7 High Feature Product Overview:This is a complete factory-original Cylinder Head assembly removed from running 2007 Cadillac SRX. Exterior Interior Details: Paint Color: Light Tarnished Silver Metallic Paint code U 994L / RPO 67U. Sunroof: Includes the Ultra View sunroof option RPO CF5.

It has been carefully disassembled and inspected to ensure it is a high-quality core or bolt-on replacement for your rebuild. Complete Assembly: Includes both the Intake and Exhaust Camshafts, as well VVT Actuators Phases shown in photos. Interior Trim: Cashmere/Tan RPO codes 39I and 392. All surfaces remain smooth and within operational tolerances.Valve train: Valves, springs, retainers are all intact.

part #: 12599722 prices

• $22.49-$78.07

specifications cylinderheapar:

• for models: Srx, Cts
• for makes: Cadillac
• for years: 2007-2009
• brand: Gm
• mpn: 12599722
• type: Cylinder Head
• material: Aluminum
• performance part: No
• manufacturer warranty: 1 Month

offer cylinderheapar:

• sold: 0
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• best offers: True
• started: April 1, 2026

returns cylinderheapar:

• policy: Returns Accepted
• paid by: Buyer
• time: 30 Days

seller cylinderheapar:

• # reviews: 4515
• rating: 99.8%
• city: Keller, Texas

general cylinderheapar:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads

payments cylinderheapar:

• credit card: Visa
• other
• wallet: Google-pay

shipping cylinderheapar:

• class: Standard
• cost: $45.00
• service: FedEx Ground / FedEx Home Delivery
• type: Fixed
• carrier: FedEx
• transit: 3-8 Days

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