Pontiac 421 Engine Specs: Unleashing the Power of Performance

Introduction

The Pontiac 421 engine is an iconic powerhouse that has left a lasting impression on automotive enthusiasts. With its impressive performance and remarkable specifications, this engine has become a legend in the world of muscle cars. In this article, we will delve into the engine configuration, engine oil specs, and service intervals of the Pontiac 421 engine, uncovering the secrets behind its exceptional performance.

Engine Configuration

The Pontiac 421 engine is a V8 engine that was introduced by Pontiac in 1961. It was designed to deliver unparalleled power and performance, making it a popular choice among muscle car enthusiasts. Let’s take a closer look at its configuration:

Engine Type V8
Displacement 421 cubic inches (6.9 liters)
Bore and Stroke 4.09375 inches x 4.00 inches
Compression Ratio 10.75:1
Fuel Delivery Four-barrel carburetor
Max Power Up to 370 horsepower
Max Torque Up to 460 lb-ft

Engine Oil Specs

To ensure optimal performance and longevity of the Pontiac 421 engine, it is crucial to use the right engine oil. Here are the recommended engine oil specifications for this beast:

Oil Type SAE 10W-30
Oil Capacity (with filter) 5 quarts
Oil Capacity (without filter) 4.5 quarts
Oil Filter AC Delco PF-25

Service Intervals

Regular maintenance is essential to keep the Pontiac 421 engine running smoothly. Here are the recommended service intervals for various engine components:

  • Oil Change: Every 3,000 miles or every 3 months, whichever comes first.
  • Oil Filter Replacement: Every oil change.
  • Spark Plug Replacement: Every 30,000 miles or every 3 years, whichever comes first.
  • Air Filter Replacement: Every 12,000 miles or every year, whichever comes first.
  • Fuel Filter Replacement: Every 30,000 miles or every 3 years, whichever comes first.
  • Coolant Flush: Every 2 years or as recommended by the manufacturer.

Conclusion

The Pontiac 421 engine is a true masterpiece, delivering exceptional power and performance. Its V8 configuration, combined with the right engine oil and regular maintenance, ensures that this engine continues to roar with power for years to come. Whether you’re a classic car enthusiast or simply appreciate the beauty of raw horsepower, the Pontiac 421 engine is a force to be reckoned with. So, buckle up and enjoy the ride as you unleash the full potential of this legendary engine.

Categories: 6.9Pontiac

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