All engines sold fully dressed are test-run in-house before they are shipped. They are either test run in the vehicle they came from or on one of the special test stands we have for each generation of the Duramax Diesel. Compression, balances rates, and CP3 function are all tested to ensure engines run well before leaving the facility. All of our test-run engines also hold the 30-day parts warranty. This includes all components on the engine, as well as the engine itself. We will issue parts for repair if there is a problem with an accessory or a smaller, fixable problem. We will issue a complete replacement warranty in the event the bottom end fails.
We put the utmost care into our engine rebuilds. All of our rebuilt engines come with a 1-year, unlimited mile parts warranty. This means we cover any parts necessary to repair a failed rebuilt engine or issue a complete replacement engine. This warranty does not cover labor. Hot tunes and various performance add-ons void the warranty.
Transmissions, Transfer Cases, Differentials
These parts are sold used. We carefully inspect each part for outward physical defects, check the color of fluid, and document mileage. They are shipped in a good, clean, usable condition. However, we still recommend changing the fluid before using it.
Rebuilt Transfer Cases
Our rebuilt transfer cases are covered for six months from purchase.
Wiring, Electrical, and Modules
Wiring harnesses, electrical components, and modules hold our 30-day parts warranty. If you purchase an electrical component and find it to have a defect, we will replace it with another used, quality component. Defective electrical items will not have a cashback option — instead, we can either replace the part or issue store credit. If you wish to return a non-defective electrical component that you did not need, it must be returned in the same condition it was purchased in, with tags included. Store credit will be issued for non-defective returns.
Any sheet metal damage must be reported at the time of pickup at HAR or delivery by HAR shipping. Damage done to sheet metal after purchase is not covered under warranty.
Manufacturer installation guidelines must be followed for the removal and installation of all units. Errors from installation, physical damage, and improper startup and break-in procedures will not be covered. Before units are released from service, the initial cause of failure must be repaired (such as overheating, fuel delivery, or any other issues). All engines are primed prior to being shipped or delivered. Transmissions contain no fluids and must be properly filled prior to startup. Before installation of the engine, check all accessories such as manifolds, fuel injections, oil pan, brackets, water pump, flywheel, sensors, wires, ignition, etc. Change oil, filters and flush remote filters, oil coolers and lines if equipped. It is vital that guidelines for installation are followed in accordance with the notecard attached to the units.