Pontiac 403 Engine Specs
Engine Configuration
The Pontiac 403 engine was a V8 engine that was manufactured by the Pontiac division of General Motors from 1977 to 1979. It was part of the Pontiac V8 engine family and was primarily used in the Pontiac Firebird and Trans Am models during that time period.
The engine had a displacement of 6.6 liters, or 403 cubic inches, hence its name. It featured a cast iron block and cylinder heads, which provided durability and strength. The engine had a bore of 4.351 inches and a stroke of 3.75 inches. It had a compression ratio of 8.2:1, which was relatively low compared to other engines of the era.
Engine Oil Specs & Service Intervals
Proper engine oil specifications and regular maintenance are crucial for the longevity and optimal performance of any engine, including the Pontiac 403. Here are the recommended engine oil specifications and service intervals for the Pontiac 403 engine:
Engine Oil Specifications:
– Oil Type: It is recommended to use a high-quality, multi-viscosity engine oil with a viscosity grade of 10W-30 or 10W-40. This ensures proper lubrication and protection for the engine components.
– Oil Capacity: The Pontiac 403 engine has an oil capacity of approximately 5 quarts, including the oil filter.
Service Intervals:
– Oil Change: It is recommended to change the engine oil and oil filter every 3,000 to 5,000 miles or every 3 to 6 months, whichever comes first. Regular oil changes help remove contaminants and maintain proper lubrication.
– Oil Filter Replacement: The oil filter should be replaced during every oil change to ensure optimal filtration and prevent debris from circulating in the engine.
Detailed Engine Specifications
| Specification | Value |
|---|---|
| Engine Type | V8 |
| Displacement | 6.6 liters (403 cubic inches) |
| Block Material | Cast Iron |
| Cylinder Head Material | Cast Iron |
| Bore | 4.351 inches |
| Stroke | 3.75 inches |
| Compression Ratio | 8.2:1 |
In conclusion, the Pontiac 403 engine was a powerful V8 engine that offered a displacement of 6.6 liters. It featured a durable cast iron block and cylinder heads. To ensure optimal performance and longevity, it is important to adhere to the recommended engine oil specifications and service intervals. Regular oil changes and proper maintenance will help keep the Pontiac 403 engine running smoothly for years to come.
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