1979 Pontiac 400 Engine: Specs, Configuration, and Maintenance

1979 Pontiac 400 Engine Specs

Engine Configuration

The 1979 Pontiac 400 engine was a powerful V8 engine that was widely used in various Pontiac models during that era. Let’s take a closer look at its specifications and configuration.

– Engine Type: The 1979 Pontiac 400 engine was a V8 engine, meaning it had eight cylinders arranged in a V-shaped configuration.

– Displacement: The engine had a displacement of 400 cubic inches, which is equivalent to 6.6 liters. This displacement refers to the total volume of all cylinders in the engine.

– Compression Ratio: The compression ratio of the 1979 Pontiac 400 engine was 8.2:1. This ratio represents the ratio of the cylinder’s volume when the piston is at the bottom of its stroke (bottom dead center) to the volume when the piston is at the top of its stroke (top dead center). A higher compression ratio generally leads to more power and efficiency.

– Horsepower and Torque: The 1979 Pontiac 400 engine produced around 220 horsepower and 325 lb-ft of torque. These figures may vary slightly depending on the specific model and any modifications made to the engine.

Engine Oil Specs & Service Intervals

Proper maintenance and regular oil changes are essential for the longevity and performance of any engine, including the 1979 Pontiac 400. Here are the recommended engine oil specifications and service intervals for this engine:

– Engine Oil Type: The 1979 Pontiac 400 engine requires a high-quality engine oil that meets the API (American Petroleum Institute) specifications of SF or SG. It is important to use the recommended oil type to ensure optimal engine performance and protection.

– Oil Viscosity: The recommended oil viscosity for the 1979 Pontiac 400 engine is 10W-30. The first number, 10W, represents the oil’s viscosity at low temperatures, while the second number, 30, represents the viscosity at high temperatures. This viscosity range provides good lubrication and protection across a wide range of operating conditions.

– Oil Capacity: The engine oil capacity for the 1979 Pontiac 400 engine is approximately 5 quarts (4.7 liters). It is important not to overfill or underfill the engine with oil, as it can affect its performance and potentially cause damage.

– Service Intervals: It is recommended to change the engine oil and oil filter every 3,000 to 5,000 miles (4,800 to 8,000 kilometers) or every 3 to 6 months, whichever comes first. Regular oil changes help remove contaminants, maintain proper lubrication, and extend the engine’s lifespan.

To ensure the best performance and longevity of the 1979 Pontiac 400 engine, it is also important to follow the manufacturer’s recommendations regarding other maintenance tasks such as spark plug replacement, air filter cleaning/replacement, and coolant flushes. Regular maintenance and proper care will help keep this classic engine running smoothly for years to come.