It depends on what type of engine you purchase. If it is a used
performance engine the warranty is for 30 days, used replacement
engines is 180 days and new remanufactured engines it is 1 year
unlimited mileage. This warranty covers the engine block and head ONLY.
The warranty covers all internal engine parts and does not cover
transmission or other parts that are not a part of the engine block or
the head. Engine block, cylinder barrels and cylinder head are
warrantied to be free of cracks or distortion. In the event of a
defective engine block or head, JDM-Online.com will replace or fix the
defective part, at our discretion.