1. Cylinder Heads & Parts Engines Components For Sale
  2. sku: 11793036139517632
  3. SATURN 21006471

SATURN 21006471 Cylinder Head Dohc SC2 1.9L

fits make: Saturn. year: 1991–1994.

21006471 Saturn 1991-1994 Sc2 Coupe Cylinder Head Assembly Oem 1.9l Dohc

( Manufacturer Part Number: 21006471 ), ( Part Type: Cylinder Head ), ( Id: Bf034b6c-4321-4774-bb44-665faa72af32 ), ( Interchange: 306-1484 ), ( Year: 1993 )

Review SATURN Sc2 Coupe Cylinder Head Assembly Oem 1.9l Dohc fits 1991–1994

The **Saturn 21006471 cylinder head (1991 1994, 1.9L DOHC)** is a meticulously engineered component designed to deliver peak performance and reliability for the iconic Saturn SL1 and SL2 models equipped with the high-revving, fuel-injected 1.9-liter DOHC (Dual Overhead Camshaft) inline-four engine. This precision-machined aluminum head features a compact yet robust design, optimized for efficient airflow and combustion, which is critical for the SL series sporty handling and spirited acceleration. The head incorporates a **four-valve-per-cylinder architecture**, with two intake and two exhaust valves per cylinder, allowing for superior breathing and improved throttle response. The **integrated camshaft covers** are securely fastened with high-quality bolts, ensuring minimal vibration and optimal heat dissipation, while the **intake and exhaust ports** are carefully contoured to maximize velocity and turbulence for optimal fuel-air mixture distribution. The **spark plug bores** are precisely drilled to accommodate standard NGK or Champion plugs, ensuring consistent ignition and combustion efficiency. This cylinder head is compatible with the **GM 1.9L DOHC engine family**, including the **F20** and **F21** variants, and is often sought after by enthusiasts looking to restore stock performance or upgrade their Saturn s powerplant. Whether used in a complete engine rebuild or as a standalone replacement for a worn or damaged head, this part exemplifies Saturn s commitment to blending performance with practicality, offering a balance of durability and responsiveness that defines the brand s early models. Proper installation requires attention to torque specifications, valve lash adjustments, and proper sealing with high-temperature gaskets to prevent leaks and ensure long-term reliability.

### **Pros and Cons of Buying a Saturn 21006471 (1991 1994) 1.9L DOHC Cylinder Head**

#### **Pros**

1. **Common and Well-Documented** The 1.9L DOHC engine (used in Saturn SC2, S-Series, and some Opel models) is a well-known design, meaning parts, repair guides, and forums are widely available. This makes troubleshooting and maintenance easier compared to rarer engines.

2. **Modular Design** The cylinder head is part of a modular engine family (shared with Opel, Vauxhall, and some Saab models), so many components (valvetrain, fuel injectors, sensors) are interchangeable with other manufacturers, reducing long-term costs.

3. **Aftermarket Support** There is a strong aftermarket presence for this engine, including performance parts (e.g., upgraded camshafts, headers, fuel systems) and diagnostic tools. Tuning options exist for both stock and modified applications.

4. **Reliability (When Maintained)** With proper maintenance (regular valve adjustments, timing belt replacement every 60,000 90,000 miles, and head gasket checks), this engine can be very durable. Many examples last well over 200,000 miles with basic care.

5. **Fuel Injection Flexibility** The DOHC version uses Bosch L-Jetronic or Motronic fuel injection, which is easier to work with than some older carbureted or later port-injected systems. Upgrading fuel pumps, injectors, or ECUs is straightforward.

6. **Potential for Performance Upgrades** The engine responds well to forced induction (turbocharging) and nitrous oxide due to its strong bottom end and head design. Many Saturn owners have successfully built these engines to 200 horsepower with stock or upgraded components.

7. **Affordable Parts** Compared to modern engines, replacement parts (heads, camshafts, water pumps, etc.) are relatively inexpensive, especially if sourced from aftermarket suppliers or salvage yards.

8. **Classic Car Appeal** If you re restoring or modifying a Saturn for fun or show, this engine has a cult following among enthusiasts, which can make finding parts and community support easier.

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#### **Cons**

1. **Timing Belt and Water Pump Failure Risk** The timing belt must be replaced every 60,000 90,000 miles (or as recommended by the owner s manual). Neglecting this can lead to catastrophic valve damage. The water pump is often integrated into the timing belt assembly, so replacing it is a common maintenance task.

2. **Head Gasket and Cooling Issues** The 1.9L DOHC is prone to head gasket failure, especially if the engine overheats or if the cooling system is neglected. White smoke from the exhaust, coolant in the oil, or overheating are warning signs. Replacing head gaskets requires careful preparation to avoid leaks.

3. **Valvetrain Wear** The DOHC version uses hydraulic lifters, which can wear out over time, leading to a "ticking" noise and potential valve float. Regular valve adjustments (every 30,000 60,000 miles) are recommended to prevent this.

4. **Electrical Quirks** The fuel injection system can be finicky, especially with older wiring harnesses. Common issues include faulty sensors (MAP, MAF, crankshaft position), weak injectors, or ECU glitches. Rewiring or replacing sensors may be necessary over time.

5. **Throttle Body and Intake Issues** The stock throttle body and intake manifold can become clogged with carbon buildup, restricting airflow. Cleaning or replacing them is often needed for optimal performance.

6. **Oil Consumption** Some examples burn oil due to worn piston rings or valve stem seals. Regular oil changes and monitoring oil levels are essential to catch this early.

7. **Rust and Corrosion** Older Saturns (especially those driven in snowy or humid climates) may suffer from rust in the undercarriage, suspension, and exhaust system. Inspecting these areas is crucial before purchasing.

8. **Limited Stock Parts Availability** While aftermarket parts exist, some original equipment manufacturer (OEM) components (e.g., specific sensors, gaskets) may be hard to find in new condition, increasing reliance on aftermarket or salvage sources.

9. **Fuel System Upgrades Needed for Performance** Stock fuel injectors and fuel pump may not support higher power levels. Upgrading to larger injectors, a high-flow fuel pump, and a tuned ECU is often required for serious modifications.

10. **Resale Value** Saturns, in general, have lower resale value compared to more popular brands. Even well-maintained examples may not hold their value as well as a Toyota, Honda, or Ford.

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### **Conclusion**

The **1991 1994 Saturn 1.9L DOHC cylinder head** is a **solid choice for enthusiasts who prioritize modifiability, aftermarket support, and reliability with proper maintenance**. It offers a good balance of performance potential and accessibility, making it ideal for DIYers, restomods, or daily drivers who are willing to put in the effort to keep it running smoothly.

However, it is **not a "set it and forget it" engine**. It demands **regular maintenance** (timing belt, head gasket checks, valve adjustments, cooling system upkeep) to avoid costly failures. If you re not comfortable with mechanical work or don t have the time for upkeep, this engine may not be the best fit.

For **budget-conscious buyers**, the **1.9L DOHC is a great option** if you find a well-documented example with a clean service history. For **performance-focused buyers**, it s one of the more tunable Saturn engines, capable of handling forced induction and nitrous oxide with the right upgrades.

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### **Recommendation**

- **Buy it if:**

- You re comfortable with basic mechanical maintenance (or have access to someone who is).

- You want a **modular, tunable engine** with strong aftermarket support.

- You plan to **restore or modify** the Saturn for fun or performance.

- You can **budget for regular upkeep** (timing belt, head gaskets, valve adjustments).

- You find a **clean example** with a **service history** (especially for timing belt/water pump replacements).

- **Avoid it if:**

- You want a **low-maintenance, plug-and-play** engine with minimal upkeep.

- You re not willing to **invest time or money** in maintenance and potential repairs.

- You re buying it **solely for resale value** (Saturns depreciate faster than most).

- The engine has **known issues** (e.g., blown head gaskets, seized lifters, or neglected timing belt) without proof of recent repairs.

**Final Verdict:** This cylinder head is a **great project engine** for the right buyer one who appreciates classic cars, enjoys working on their vehicle, and understands the trade-offs. With proper care, it can be a **reliable and fun** powerplant for years to come.

Details:

Search for more parts Saturn's SERIES. Cylinder Head. Model: Saturn's SERIES.

part #: 21006471 price

  • $375.00

specifications cylinderheapar:

  • for makes: Saturn
  • for years: 1991-1994
  • mpn: 21006471
  • part type: Cylinder Head
  • id: Bf034b6c-4321-4774-bb44-665faa72af32
  • interchange: 306-1484
  • year: 1993

general cylinderheapar:

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

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  • sold: 0
  • started: March 26, 2026
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for makes: saturn, for years: 1991-1994, part type: cylinder head, id: bf034b6c-4321-4774-bb44-665faa72af32, interchange: 306-1484, year: 1993,
category: auto parts > car truck parts accessories > engines engine parts > cylinder heads, sku: 11793036139517632,
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