1972 Chevy 402 Engine Specs
Engine Configuration
The 1972 Chevy 402 engine was a part of the big-block engine family produced by General Motors. It was a V8 engine with a displacement of 402 cubic inches, or 6.6 liters. This engine was commonly referred to as the “396” due to its predecessor’s displacement, but it was actually increased to 402 cubic inches in 1970. The engine featured a cast-iron block and cylinder heads, providing durability and strength.
Engine Oil Specs & Service Intervals
To keep the 1972 Chevy 402 engine running smoothly, it is crucial to use the correct engine oil and follow the recommended service intervals. Here are the specifications and service intervals for the engine:
Engine Oil Specifications
The recommended engine oil for the 1972 Chevy 402 engine is a high-quality, multi-viscosity oil with a viscosity rating of 10W-30. It is important to choose an oil that meets the API (American Petroleum Institute) service classification of SF or SG. This ensures that the oil provides adequate protection and performance for the engine.
Service Intervals
Regular maintenance is essential to prolong the life of the 1972 Chevy 402 engine. Here are the recommended service intervals:
1. Oil Change: It is recommended to change the engine oil every 3,000 miles or every three months, whichever comes first. Regular oil changes help remove contaminants and ensure proper lubrication of engine components.
2. Oil Filter Replacement: Along with the oil change, it is crucial to replace the oil filter. This helps remove any particles or debris that may have accumulated in the filter, ensuring clean oil circulates through the engine.
3. Spark Plug Replacement: The spark plugs should be replaced every 20,000 to 30,000 miles. This ensures optimal ignition and combustion, leading to better engine performance and fuel efficiency.
4. Air Filter Replacement: The air filter should be replaced every 12,000 to 15,000 miles. A clean air filter allows for proper airflow to the engine, improving fuel efficiency and reducing engine strain.
5. Coolant Flush: It is recommended to flush and replace the engine coolant every two years or 30,000 miles. This helps prevent overheating and protects the engine from corrosion.
6. Timing Belt Replacement: The timing belt should be replaced every 60,000 to 100,000 miles, depending on the manufacturer’s recommendations. A worn-out timing belt can cause severe engine damage if it fails.
7. Regular Inspections: Regularly inspecting the engine for any leaks, unusual noises, or abnormal vibrations is essential. Addressing any issues promptly can prevent further damage and costly repairs.
| Engine Specifications | Value |
|---|---|
| Displacement | 402 cubic inches (6.6 liters) |
| Engine Type | V8 |
| Block Material | Cast Iron |
| Cylinder Head Material | Cast Iron |
| Valvetrain | OHV (Overhead Valve) |
| Fuel System | Carbureted |
| Horsepower | 240-270 HP (depending on configuration) |
| Torque | 345-390 lb-ft (depending on configuration) |
In conclusion, the 1972 Chevy 402 engine was a powerful V8 engine with a displacement of 402 cubic inches. It featured a cast-iron block and cylinder heads, providing durability and strength. To ensure optimal performance and longevity, it is important to use the recommended engine oil and follow the suggested service intervals. Regular maintenance and inspections will help keep the engine running smoothly for years to come.
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