Notes:

• VIN 4
• Head Cast #: 4663894AC/T, 4792728AA
• Block Cast #: 4792660AA/AB
• 2-8mm bolts for oil pan on front
• Late model
• Small injector holes
• Steel rear seal housing
• 24 valves

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.

Please CLICK HERE for ATK Warranty