Mountune Engine Assembly Warranty Information - Terms & Conditions

Mountune is confident in our products and services and we proudly stand behind our workmanship. Therefore, we offer a limited warranty against defects in workmanship or materials, covering both parts and labor, for a standard period of 1-Year/12,000-Miles.

Mountune Engine Assembly Limitations are as follows:
  • Standard Warranty period begins on the day the engine was delivered.
  • Standard Warranty applies only to mountune high performance ecoboost short block / long block assemblies assembled by mountune.
  • Standard Warranty does not extend to any other part of the engine, turbocharger, accessories, or vehicle in which the engine is installed, or subsequent damage to any component or part of the vehicle due to an engine failure.
  • Standard Warranty coverage excludes any shipping costs incurred to return the product to our facility. If the warranty claim is denied, the client will be responsible for return shipping from our facility.
  • Standard Warranty coverage excludes any and all labor expenses needed for reassembly, installation or reinstallation, as well as any components (i.e. gaskets, fluids, etc.) required for reinstallation.
  • Standard Warranty is only offered if the engine assembly is professionally installed, with receipts provided.
  • Standard Warranty is non-transferrable and only offered to the original purchaser of the engine.
  • All parts used in the assembly of the mountune engine assembly carry the manufacturer’s individual component warranties. No warranty is expressed or implied for any customer-supplied components.
  • Standard Warranty clients are responsible for initiating a warranty claim with mountune directly.
  • The client agrees that they will be held responsible for all engine tear down costs for claims deemed insufficient and/or invalid.
  • Proof of proper maintenance is the owner’s responsibility.
  • Any covered repairs or replacement will not extend the warranty period.
Mountune Engine Assembly Warranty does NOT cover:
  • Damage due to improper engine installation, negligence, abuse, alteration or accident.
  • Improper or insufficient engine break-in (failure to follow assigned break-in procedure, including oil changes.)
  • Damage resulting from improper engine tuning including, piston skirt scuffing, lifted heads / head gasket failure, damage indicated by head gaskets exhibiting burned or crushed fire ring(s), or damage caused by improper combustion, detonation, pre-ignition or extreme cylinder pressures, as indicated by melted, broken, or eroded pistons or bent wrist pins/worn wrist pin bushings.
  • Damage resulting from improper transmission installation or clutch adjustment, including crankshaft thrust bearing damage on the transmission side only.
  • Damage caused by lack of proper maintenance, failure to follow scheduled maintenance intervals or failure to use or maintain proper type and levels of fluids, fuel, oil, and lubricants, including accelerated wear from contaminated oil or fuel wash.
  • Damage caused by the failure of other engine-related components, such as fuel injectors or pump, wiring, water pump, oil pump, sensors, or gaskets.
  • Damage related failure to replace contaminated oiling components. Oiling components may include oil pump, oil cooler, oil pick up, oil pan, screened banjo bolts and all other contaminated oiling related components depending on the model year and layout of the vehicle.
  • Engine damage without documentation of professional installation, including proof of purchase of replacement oiling components. Proof of proper maintenance is the owner’s responsibility.
  • Damage due to abuse, including over-rev, overheating, lean conditions or oil starvation.
  • Engines where the odometer has been disconnected or mileage has been altered.
  • Failure caused by short block or cylinder head casting flaw or failure.
  • Damage caused by vehicle collisions or other accidental damage, including shipping damage.
  • Damage caused by foreign objects dropped or drawn into cylinders or the crankcase, including water or other fluids.
  • Towing, shipping, rental vehicles, loss of time, inconvenience, loss of use or other economic loss to the extent allowed by law.
  • Damage to subsequent components, such as a turbocharger or wastegate, due to failure of an engine or engine component.

Standard Warranty Claim Procedure

All Standard Warranty claims must be directed to Mountune for assignment of a return merchandise authorization number (RMA) to facilitate inspection.
Email your original purchase receipt to for an RMA number. Following the issuance of an RMA claim number, mountune requires the engine to be returned to our facility for inspection and final determination of claim eligibility. The client is responsible for all shipping and handling costs to return the engine back to mountune. Upon receipt of the engine, mountune will disassemble the engine to determine if product manufacturing, assembly, parts defect, improper installation, or improper tuning directly or indirectly caused the engine to prematurely fail. After engine teardown is complete, mountune will determine whether warranty coverage applies.

Address for Engine Inspection Shipping
Mountune USA
1000 East Carson Street
Carson, CA 90745