How to Tell If a Truck Engine Is Replaced or Refurbished

When purchasing a used truck, the engine's true condition dictates your return on investment. Many buyers confuse a "replaced" engine with a "refurbished" one, but understanding the difference is vital for your business.

The Core Difference:

1. Replaced: The original engine was removed, and another unit (either brand-new or used from another truck) was installed.
2. Refurbished: The original engine was disassembled, cleaned, and fitted with new wear parts like piston rings, bearings, and gaskets to restore performance.

How to Spot the Signs:

1. Check Engine Numbers: This is the most reliable method. Compare the number stamped on the engine block with the chassis plate and registration documents. A mismatch confirms a replacement.
2. Inspect Bolts and Sealants: Look for tool marks on cylinder head bolts. Non-factory sealant (often bright-colored or uneven) at the joints usually indicates the engine has been opened for refurbishment.
3. Paint Overspray: Some sellers spray a fresh coat of paint over the engine to make it look new. If you see paint on rubber hoses, wires, or plastic connectors, it’s a red flag that repairs are being masked.

As expert exporters of HOWO and SHACMAN, we provide full transparency. For refurbished units, we supply a detailed list of replaced parts and engine test videos so you can buy with total confidence.