CHEVROLET TRUCK 12360338 Cylinder Head S10PICKUP 306-01445 2.5L

( Brand: Chevrolet Truck ), ( Manufacturer Part Number: 12360338 ), ( Model: S10PICKUP ), ( Part Type: Cylinder Head ), ( Conditions Options: 2.5 ), ( Genuine Oem: Yes ), ( Ipn: 306-01445 )

Review CHEVROLET TRUCK Cylinder Head 2.5l Pickup fits S10 1989

The **Chevrolet 12360338 Cylinder Head for the 2.5L Engine in a 1989 S-10 Pickup** is a critical and highly specialized component designed to ensure optimal performance, reliability, and longevity for this iconic compact truck. Engineered to fit the **L65 2.5L inline-four cylinder** found in the first-generation GMC S-10 and Chevrolet S-10 (1982 1993), this cylinder head is a precision-machined assembly that plays a pivotal role in the combustion process. Crafted from high-quality cast iron, it features a robust and durable design that withstands the intense heat and pressure generated during engine operation, making it a cornerstone of the powertrain s structural integrity. The head is equipped with **four intake and exhaust valves per cylinder**, arranged in a classic pushrod configuration, allowing for efficient airflow and proper valve actuation through the use of rocker arms and a single overhead valve (SOV) design. This setup ensures smooth operation while maintaining the classic S-10 s reputation for simplicity and ruggedness.

One of the standout features of this cylinder head is its **integrated combustion chamber design**, which optimizes the air-fuel mixture s combustion efficiency, contributing to better fuel economy and power output. The head is also outfitted with **threaded spark plug holes** and **valve guide bosses**, ensuring precise alignment and secure installation of the valves, which are typically held in place by **spring-loaded retainers and keepers**. Additionally, the head includes **cast-in oil passages** that facilitate proper lubrication of the valve train, reducing wear and preventing premature failure. For those seeking enhanced performance, this cylinder head can often be upgraded with aftermarket components such as **stainless steel valves, hardened valve seats, or high-flow cylinder head gaskets**, which improve airflow and sealing while extending the life of the engine.

When installing the **12360338 cylinder head**, it is essential to follow proper procedures to ensure a leak-free and high-performance fit. This includes using a **high-quality cylinder head gasket** (such as Fel-Pro or ARO) to prevent coolant or oil leaks, as well as ensuring that the **valve springs, retainers, and rocker arms** are in good condition. The head must also be properly torqued to the manufacturer s specifications typically around **60 70 ft-lbs** for the head bolts to avoid warping or damage. For restoration projects or high-mileage engines, this cylinder head is an excellent choice, offering a balance of authenticity and reliability. Whether you're rebuilding an original engine or upgrading an older S-10 for modern use, this part ensures that the heart of your truck continues to run strong, delivering the classic performance that Chevrolet s compact pickup was known for in the late '80s and early '90s.

Buying a **1989 Chevrolet S10 with a 2.5L inline-6 cylinder head (part number 12360338)** can be a cost-effective way to restore or repair an older truck, but it comes with several considerations. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

---

### **Pros of buying a 1989 Chevrolet S10 2.5L Cylinder Head (12360338)**

1. **Affordability**

- The 2.5L inline-6 engine (especially the cylinder head) is relatively inexpensive compared to modern aftermarket or OEM parts. This makes it a budget-friendly option for restorations or repairs.

- The S10 itself is a common truck, so parts are widely available, reducing long-term costs.

2. **Simplicity and Reliability**

- The 2.5L inline-6 (also known as the "Iron Duke" engine) is a straightforward design with fewer components than modern engines. This makes it easier to work on for DIYers.

- The engine is known for its durability, especially when maintained properly. Many examples last well over 200,000 miles with basic upkeep.

- The pushrod design (if the head is for a pushrod version) is simpler than overhead cam (OHC) setups, reducing complexity in rebuilds.

3. **Aftermarket Support**

- There is a strong aftermarket presence for the 2.5L engine, including performance parts, gaskets, and rebuild kits. This makes upgrades or repairs easier.

- Common modifications (like porting the head, upgrading valves, or installing a turbo) are well-documented and relatively accessible.

4. **Fuel Efficiency and Drivability**

- The 2.5L engine is known for its decent fuel economy (around 18 22 MPG in a stock S10), which is better than many modern trucks with larger engines.

- The truck s lightweight design (especially in base models) makes it nimble and easy to drive, appealing to those who want a utilitarian but manageable vehicle.

5. **Classic Appeal**

- The S10 is a popular classic truck, especially in its early years. Restoring one can be rewarding for enthusiasts who enjoy the nostalgia and customization potential.

- The truck s simplicity also makes it a good candidate for modifications like turbocharging, supercharging, or even swapping in a modern engine later if desired.

6. **Ease of Disassembly and Rebuild**

- The engine s design allows for relatively easy teardowns and rebuilds. Many mechanics and DIYers find the 2.5L engine more forgiving than more complex modern engines.

- The cylinder head itself is a common failure point (due to warping or valve stem seal leaks), but replacing it is a straightforward job compared to some other engines.

---

### **Cons of buying a 1989 Chevrolet S10 2.5L Cylinder Head (12360338)**

1. **Common Failure Points**

- **Cylinder Head Warping**: The 2.5L inline-6 is notorious for warped heads, especially if the engine overheats or lacks proper maintenance. A new or rebuilt head is often necessary to avoid leaks or poor performance.

- **Valve Stem Seal Leaks**: These seals wear out over time, causing oil to seep into the combustion chamber and foul spark plugs or valves. Replacing them is a recurring expense.

- **Rod Bearings and Main Bearings**: While less common than head issues, bearing failures can occur if the engine is neglected. This is a more expensive repair.

- **Distributor and Ignition Issues**: The early S10s often have distributor problems, including worn points or ignition modules. Modernizing the ignition system can be costly.

2. **Emissions and Modern Compliance**

- The 1989 S10 was built to **1988 emissions standards**, which are stricter than some older models but not as demanding as modern EPA regulations. However, if you plan to drive the truck frequently, you may need to address emissions-related issues (like EGR or PCV system problems) to avoid check engine lights or failure on smog checks in some states.

- Some states have restrictions on older vehicles, so check local regulations before purchasing.

3. **Rust and Structural Issues**

- The S10 is prone to rust, especially in the frame, subframe, and wheel wells. A thorough inspection is critical to avoid buying a truck with hidden structural damage.

- The suspension (especially the control arms and bushings) often wears out, requiring frequent replacements.

4. **Fuel and Fuel System Problems**

- The 2.5L engine runs on **regular unleaded fuel**, but older fuel systems (carbs or early fuel injection) can develop leaks or clogs. Replacing the carburetor or fuel injectors may be necessary.

- The **fuel pump** and **fuel lines** can fail, leading to hard starts or no-start conditions.

5. **Transmission and Drivetrain Wear**

- The **4T60-E automatic transmission** (common in 1989 S10s) is known for failing over time, especially the torque converter and valve body. Rebuilding or replacing it can be expensive.

- The **differential and driveshafts** may also need attention, particularly if the truck has been driven hard or neglected.

6. **Modern Parts and Compatibility**

- While parts are available, some modern components (like sensors, wiring harnesses, or electronics) may not be directly compatible with the S10. Adapters or aftermarket solutions may be required.

- The truck lacks modern safety features (like stability control, airbags, or advanced driver aids), which may be a concern for some buyers.

7. **Resale Value and Practicality**

- The S10 has **low resale value** compared to modern trucks or even newer classics. If you plan to sell it later, the return on investment may be minimal.

- The truck s size and payload capacity are limited compared to modern trucks, which may not suit heavy-duty tasks or towing.

8. **Maintenance Requirements**

- Frequent oil changes (every 3,000 5,000 miles for older engines).

- Checking and replacing valve stem seals, head gaskets, and timing chain (if applicable).

- Addressing rust and body corrosion promptly.

- If you re not mechanically inclined, labor costs for repairs can add up quickly.

---

### **Conclusion**

- **On a budget** and looking for an affordable project vehicle.

- **Mechanically inclined** or willing to invest time in repairs and maintenance.

- **Interested in classic trucks** and enjoy the process of restoring or modifying a vintage vehicle.

- **Prioritizing simplicity and fuel efficiency** over modern convenience or towing capacity.

- Want a **low-maintenance, high-reliability** vehicle for daily use.

- Need **modern safety features, high payload capacity, or towing capability**.

- Are **unwilling to address common issues** like head warping, valve stem seals, or transmission problems.

- Plan to **keep the truck long-term** without significant modifications, as resale value will be low.

---

### **Recommendation**

- Purchase a **new or rebuilt head** from a reputable supplier (like Summit Racing, RockAuto, or a local machine shop) rather than a used one, as warped or leaking heads are a common issue.

- Consider **porting and polishing** the head if you plan to modify the engine for better performance.

- Pair it with a **rebuilt engine** if possible, as other components (like the camshaft, lifters, and bearings) may also need attention.

- **Inspect thoroughly** for rust, head warping, transmission issues, and electrical problems. A pre-purchase inspection by a mechanic is highly recommended.

- Cylinder head replacement or machining.

- Valve stem seal replacement.

- Transmission rebuild or replacement.

- Suspension and drivetrain upgrades.

- **Consider a project truck** rather than a daily driver unless you re prepared for ongoing maintenance.

- A **used 4.3L V6 S10** (more durable but still prone to head issues).

- A **modern compact truck** (like a used Ford Ranger or Toyota Tacoma) if you need better reliability and resale value.

- A **restored classic truck** with a **swapped engine** (e.g., a 5.0L V8 or turbocharged 2.5L) for better performance and longevity.

- **Project car/restoration** for enthusiasts

Details:

The part is not a special order. The part has not been altered, modified, disassembled, overheated or damaged. Transmissions: Transmissions will come with the torque converter and all sensors.

Scope: This limited warranty covers defects in the purchased part that render it inoperable or defective within 90-day period. Labor and Related Costs: This limited warranty does not cover labor, diagnostics, towing, rental car costs, or any other expenses related to the installation, testing, removal, replacement of a part. Brokered/non-stocked parts ordered specifically for your request. The part has not been installed.

Limited Warranty Coverage. No expedited shipping is available. Please remember you are purchasing OEM Original Equipment Manufacturer USED parts.

All parts sold as is except expressly provided below. Sensors, valve covers, timing covers attached to core short/long blocks are not covered. Axles Assemblies: Axle assemblies will not include any brake hardware: Calipers/Rotors/Shoes/Pads/Hoses/Brake Lines. Bumper assemblies DO NOT come with Upper Grilles unless stated.

Bolt-on items Exclusions from Limited Warranty. The part is not a custom body cut. Normal wear and tear from the previous use is expected.

Convenience Items: Items attached to or included with the part, such as wiring, bulbs, sockets, sensors, coils, distributor caps, spark plugs, water pumps, filters, brake parts, backing plates, hoses, vacuum lines, u-joints, timing belts/components, similar items, are considered convenience items and not covered by this limited warranty. Dispute Resolution. Steering Columns: All steering columns sold will come without airbags. Check the Q A section for Business Support.

Any bulbs or wiring still attached to the,Tail Light,assemblies are not warranted part of the listing in any way.

part #: 12360338 prices

• $119.99-$200.00

specifications cylinderheapar:

• for makes: Chevrolet
• for years: 1989
• brand: Chevrolet Truck
• mpn: 12360338
• model: S10pickup
• part type: Cylinder Head
• conditions options: 2.5
• genuine oem: Yes
• ipn: 306-01445

general cylinderheapar:

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

seller cylinderheapar:

• city: Annandale, Minnesota
• rating: 99.7%
• # reviews: 47186

offer cylinderheapar:

• quantity: 1
• availability: In Stock
• started: May 22, 2026
• options: Ship-to-home
• sold: 0

returns cylinderheapar:

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

payments cylinderheapar:

• wallet: Paypal
• other
• credit card: Discover

shipping cylinderheapar:

• service: Standard
• cost: $65.00
• class: Standard
• transit: 4-6 Days
• type: Fixed

Chevrolet Truck 12360338 Is Similar To:

• 10118604 General Motors Nos Gm Chevrolet Buick Oldsmobile Pontiac Cadillac Head (29.1% similar) The part number is group. If you are out of the country please understand this while buying on item. Nos stripes, decals, electrical and mechanical parts important. Please also listings for thousands more nos parts available immediate purchase. When you homepage just enter the year, make and or ...(April 6th, 2018)
• 10141913 General Motors Nos Gm Chevrolet Gmc Oldsmobile Truck Suv Head (29.6% similar) I do guarantee them to be nos or as otherwise described in my offer. Nos stripes, decals, electrical and mechanical parts important. When you homepage just enter the year, make and or model of your vehicle in search bar I if are out country please understand this while buying on item. You are buying...(April 5th, 2018)
• 10149600 General Motors Nos Gm Chevrolet Gmc Truck Suv Diesel Cylinder (35.2% similar) 2j diesel V81990 1991 Chevrolet blazer and GMC jimmy model's with nos stripes, decals, electrical and mechanical parts important. This means if the item is lost or damaged while in transit there no coverage. I do guarantee them to be nos or as otherwise described in my offer. This is a new old ...(February 14th, 2019)
• Vortec Big 7400 1998 12560241 Cylinder Gm Port Block Head Chevrolet Oval (36.1% similar) Free shipping if this item offers free shipping free shipping for all 50 USA. 720 valves specifications manufacturer Chevrolet gm part also known as condition this unit is used but in good working condition. Higher shipping and handling cost prevail...(April 20th, 2015)
• 12636478 Ac Delco Cylinder Head Gasket New For Chevy Chevrolet Silverado (36.1% similar) Please refer to the manufacturer APOS instructions ensure that you can take advantage of your product warranty. The manufacturer APOS warranty shall be exclusive remedy for any such product defect or failure. Please for any questions. Each warranty gives you specific rights, and may have other ...(February 15th, 2019)
• 12636479 Ac Delco Cylinder Head Gasket New For Chevy Chevrolet Silverado (34.7% similar) The manufacturer APOS warranty shall be exclusive remedy for any such product defect or failure. Each warranty gives you specific rights, and may have other rights which vary from state. Some manufacturers require that you register your product to activate its warranty. Please for any questions...(February 15th, 2019)
• 12636480 Ac Delco Cylinder Head Gasket New For Chevy Chevrolet Silverado (36.1% similar) Some manufacturers require that you register your product to activate its warranty. Please for any questions. Please refer to the manufacturer APOS instructions ensure that you can take advantage of your product warranty. Each warranty gives you specific rights, and may have other rights which vary ...(February 15th, 2019)
• C40-41-4300 1961 Gasket Gm Cylinder 1396341 Head Kit 63 Truck Chevrolet 62 Nos (36% similar) Whether you re looking for parts to keep your oldie on the road, restoring your dream cruiser, accessorizing your bomb, or riding slow in your low rider join our group of classic car fans. In the box are 3 metal gaskets and 2 black rubber seals. I don't know if it is complete or not. Group number. ...(March 24th, 2015)
• 14011058 Chevrolet Performance Gm Chevy Sb Bowtie Cylinder Heads Int Cham (41.4% similar) ...(May 21st, 2018)
• 14014415 Gm Chevrolet Cylinder Head (43% similar) ...(June 19th, 2018)
• 14044861 Chevrolet Bbc Aluminum Head (37% similar) These items are sold as is, no warranty. We priced low because have to get these items out of storage and know they are for a specific application. He was an avid car builder and collector. He also raced cars and jet boats. The heads have never been used. These heads were to be used in a race ...(September 25th, 2017)