When buying a used car it is not always easy to know if the engine has been rebuilt. A engine is considered to be rebuilt if it has been dismantled, inspected, cleaned and some parts are replaced or repaired. A engine is usually rebuilt if the engine's bearing was showing wear or the piston rings where poorly positioned. When such information is not found from reciepts and warrenties in the glove department, one should check phycical signs of the car to determine if the engine has been rebuilt.
Things You Will Need
Look for dirt or grease build up or unusual changes in color around the engine. If some areas are very clean and newly painted and other parts of the engine is dirty with rusted areas it could mean the engine has been rebuilt.
Check for new parts combined with older parts. Look for newer bolts
holding the exhaust manifolds and oil pan on. Search for any gasket
sealer which may have been squeezed out during the rebuild.
Evaluate belts and hoses, to see if they appear to look newer then
other parts in the engine. Most hoses and belts are changed when a
engine is rebuilt.
Examine the engine for tool marks from ratchets and wrenches.
Remove a spark plug to see marks around the cylinders, either scratched
from tool marks or moved grease.
Look for a mark or brand on the engine that does not match the
original engine brand. Many engine rebuild manufacturers will place a
sticker on the engine with warrantee numbers.
Check for a coin metal shaped object around the freeze plug.
Factory re-builders attach a small metal coin shaped temperature censer
beside the freeze plug of a rebuilt head.
Tips & Warnings