All engines carry a 90-day, unlimited mileage warranty. All engines are warranted against excessive oil use, excessive smoking, rod knock, cracked block, cracked heads, and bad crankshafts, unless otherwise noted at the time of sale. Warranty will be voided without proof of oil changes at 3000 mile intervals. Engine assemblies are limited to block and cylinder heads as a unit with valve covers and oil pan. All engine accessories, fuel systems, distributors, carburetors, idle valves, throttle bodies wiring, exhaust manifolds, alternators, smog pumps, power steering pumps, and air conditioning compressors are not covered under this warranty but may be included on some engine assemblies to make installation easier.

Any engine, transmission or rear end assembly that is taken apart, modified or abused by customer will have no warranty, return, credit or exchange.