Our Warranty

Copy of Remanufactured/New Engine Limited Warranty

The engine builder warrants that their remanufactured/new engine shall be free of defects from materials and/or workmanship, when installed properly by a competent technician, used for normal use and serviced for the periods of time or distance from date of purchase, whichever occurs first, as listed below:

This warranty is expressly in lieu of any other warranty expressed or implied, including but not limited to, merchantability or fitness for a particular purpose, and all other obligations or liabilities on the part of the engine builder. By purchasing this engine it is understood that the customer accepts and agrees to comply with the terms of this limited warranty.

TURN KEY / COMPLETE ENGINES: Wolverine engines are warranted for two years (24 months) / 24,000 miles from the original invoice date.

LONG BLOCK: Wolverine engines are warranted for one year (12 months) / 12,000 miles from the original invoice date.

MARINE WARRANTY TERMS: Engines used in marine applications that are not intended as such carry no warranty, and no provision for labor claims. Wolverine does not recommend using engines in the marine capacity unless they have been cataloged as such. Cataloged marine turn key engines carry a 1 year / 500 hour warranty. Marine long blocks and short blocks carry no warranty.

RACE ENGINE WARRANTY TERMS: Race engines or engines used in racing carry no warranty. 

SHORT BLOCKS/ MACHINE WORK: Short blocks carry no warranty. Wolverine guarantees proper machine work but is in no way responsible for the engine or parts associated with the engine on engines that Wolverine performs work on but does not build to at least a long block.

NITROUS, SUPERCHARGED, AND TURBO CHARGED:  Any forced induction such as Nitrous, Supercharged, and Turbo charged engines carry no warranty.

CUSTOMER PROVIDED PARTS: Wolverine does not provide any warranty on engines or other services using customer provided parts. 

LABOR CLAIMS: Wolverine engines will pay no more than $600 for a turn key engine or $300 for a long block engine in labor claims. If the repairs are to exceed this amount the customer may choose to remove the engine and have it shipped back to Wolverine Engines for repair. 

SHIPPING CHARGES: Wolverine Engines will pay for freight on warranty claims up to $600 for a turn key engine and $300 for a long block. NOTE: this can not be combined with labor claims, only one or the other will be paid. 

PRODUCT REPLACED UNDER WARRANTY: Product replaced under warranty carries the remainder of the original product’s warranty term. Repairs or replacement does not extend or renew the length of warranty nor does it imply fault.

MAINTENANCE REQUIREMENTS: Maintenance must be performed in accordance with our Break IN Procedures and after the break in period then with the manufacturer’s maintenance schedule. Records of the maintenance performed, receipts and work orders must be kept. The parts, labor, date, mileage or hours, and service performed should be documented on the receipts. Failure to perform these basic operations will result in a voided warranty.


  1. This Limited Warranty does not cover damage or loss due to the following services: 
  2. Misuse, maintenance neglect, abuse, vandalism, abnormal operation or accidents. Including but not limited to improper tune, over revving and overheating; 2. Any form of towing or assistance services; 3. Defective or improper installation; 4. Improper break-in; 5. Environmental conditions, overheating or freeze cracks; 6. Any damage due to detonation, improper timing or improper fueling (The engine Tune); 7. Lack of lubricants or fluids; 8. Foreign material in the combustion chamber or oil pan; 9. Failures of components or parts not furnished with the engine; 10. Modifications and/or alterations to the engine. The engine must not be opened up without approval or warranty will be void; 11. Crankshaft thrust surface worn due to defective or improperly installed clutch, torque converter or motor mounts; 12. Rust, corrosion or damage caused by electrolysis;
  3. This Limited Warranty does not cover or provide payment or reimbursement for the following services: 1. Any Fluids; 2. Towing charges or other substitute transportation; 3. Diagnostic time or service calls; 4. Gaskets or other parts or items associated with but not included with warranted engine; 5. Loss of time, income, sales or profits. Loss of use of vehicle; 6.Any type storage fees; 7. Legal expenses. 8. Injury or death to persons or damage or destruction of property; consequential or incidental damages. 
  4. This Limited Warranty does not cover the following: 1. Transfer to another owner; 2. Minor oil leaks; 3. Any oil leaks from engines with rope seals.


Immediately after the discovery of a potential defect and prior to the expiration of the warranty period, the customer must comply with the following procedure:

  1. Discontinue use of the engine or part.
  2. Contact the installer of the engine to determine if they think the issue may be a warranted defect. 
  3. Unless a field repair is specifically authorized by us, the engine or part thought to be defective must be returned to us or our authorized inspection station for evaluation, with the return location to be determined at our sole discretion. All returned engines or parts must be accompanied by a copy of the customer’s original invoice or receipt showing the date the returned engine or part was purchased by the customer.
  4. Returned engines must be returned with all parts intact that were originally furnished with the engine.

Subject to limitations listed herein, we, as its option, shall repair or replace a product within the warranty term after the determination by us that the product is defective. All products are returned to us for inspection. Products not returned to us will not be warranted. All repairs and/or replacements covered by this warranty must be authorized by us. Unauthorized repairs will not be paid.

HEAT TABS: All engines have temperature sensing devices installed. If engine temperature exceeds 250 degrees Fahrenheit (200 for marine engines) warranty is VOIDED. If heat tabs are removed warranty is also VOIDED.