The GM 602 crate engine, also known as the CT350 IMCA sealed racing engine, is one of the most popular entry-level circle track racing engines in North America. Built by Chevrolet Performance, it is designed to provide affordable, equal-performance racing for grassroots motorsports.
Known for its durability, sealed design, and cost-effective maintenance, the 602 crate engine delivers consistent power and is widely used in IMCA, dirt track, and stock car racing classes.
GM 602 Crate Engine Overview
The 602 crate engine is based on a Chevrolet 350 small-block V8 platform and built with a cast-iron block, Vortec-style cylinder heads, and a sealed configuration to ensure fair competition in racing series.
Its design prioritizes reliability, cost control, and long-term durability rather than extreme horsepower, making it ideal for entry-level racing divisions.
GM 602 Crate Engine Specifications
Engine Performance Overview
The GM 602 crate engine is designed for consistent mid-range power delivery, making it ideal for dirt track racing where traction and torque are more important than peak horsepower.
Its broad torque curve allows drivers to maintain better control on tight corners and uneven racing surfaces.
Key Insight: The 602 engine is not about maximum power—it is about balanced, equal-performance racing for affordability and competition parity.
Oil Type, Capacity & Maintenance
- Recommended Oil: 5W-30 full synthetic or racing oil
- Alternative: 15W-50 for heavy-duty racing use
- Oil Capacity: ~8 quarts (with filter)
- Oil Filter: Chevrolet Performance CT350 compatible filter
- Oil Change Cost: $50 – $100 depending on oil & labor
Oil Change Interval
- Standard racing use: Every 5–10 race nights
- Heavy dirt track use: After each race weekend recommended
- Engine break-in: First oil change after initial run cycle
Best Oil Brands for 602 Engine
- Mobil 1 Racing Oil
- Valvoline VR1 Racing Oil
- Castrol EDGE High Mileage
- Royal Purple Racing Series
- Lucas Oil Synthetic Racing Oil
Common GM 602 Engine Issues
Frequently Asked Questions (FAQs)
What is a 602 crate engine?
It is a sealed 5.7L Chevrolet small-block V8 used in entry-level racing.
How much horsepower does a 602 crate engine have?
It produces around 350 horsepower and 396 lb-ft of torque.
What oil does a 602 engine use?
5W-30 synthetic or racing oil is commonly recommended.
How much does a 602 crate engine cost?
Typically ranges from $7,000 to $8,500 depending on configuration.
Final Summary
- Engine: GM 602 5.7L V8
- Power: ~350 HP
- Torque: ~396 lb-ft
- Use: Circle Track Racing
- Oil Capacity: ~8 Quarts