If you hear a knocking sound coming from your diesel engine, the most likely culprit is the fuel injectors. If the fuel injectors are not properly lubricated, they can mistime the fuel releases ...

They test the engine, and it has an unmistakable sound that doesn’t seem to be the hallmark of a healthy engine. Dave says, “Sounds like a timing chain,” and the other mechanic agrees.

‘Sounds like a brand new GM truck engine’: Mechanic reveals the engine noise you never want to hear—especially in a Hyundai or Kia. Then he reveals what you can do about it ‘Turn the radio ...