ATK Core Return Process
JEGS and ATK appreciate your business and want to ensure that your core return is as smooth as possible.
- VIN G, H, Q, U
- Head Cast #: 434, 450
- Block Cast #: 776, 777, 778, 979, 909
- 2 bolt main
- 2 piece rear main seal
- Non-roller cam
- Perimeter bolt valve covers
- 6 bolt exhaust
- Driver side dipstick
Engine Break-In Procedure
Use conventional or break-in oil (non-synthetic) for the first 600 miles of operation. Do not drive for long periods at any single speed, always vary your speed. Do not tow a trailer or put other heavy loads on the vehicle. Check the engine oil and coolant levels daily.
At 600 Miles change the engine oil and filter using conventional (non-synthetic) oil. Check fuel and ignition settings; adjust valves (where applicable).
After the first 5,000 of service synthetic engine oil may be used. Follow your vehicle owner’s manual for service intervals.
Renew Your General Motors Powerplant
ATK builds remanufactured crate engines with higher quality than new. Every engine is reverse engineered, allowing ATK to find and remove any factory original defect. This attention to detail and quality will save you time and money by keeping your Chevrolet or GMC out of the shop and on the road. Engines are factory checked after assembly to ensure proper operation.
Remanufactured crate engines are built to OE horsepower and torque specifications.
ATK Remanufactured Crate Engines Warranty
- 36 month/unlimited mileage warranty for gasoline engines
- 12 month/12,000 mile warranty for diesel engines
- 12 month/12,000 mile warranty for vehicles above 11,000 gross vehicle weight
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.