The guys at MTI Racing were looking to put together a Nissan GT-R engine, but first they Magnafluxed the crank and rods, and it’s a good thing they did. To ensure parts can get reused and don’t have signs of stress and cracks, magnafluxing can save you from more expensive repairs down the road.
Cracks are bad news because they never heal themselves. Once a crack starts, it always gets worse. Checking critical engine parts and castings is time well spent if it heads off a major problem that might result in a major engine issue or a warranty claim.
A cracked cylinder head or engine block may or may not be bad news depending on the size and location of the crack(s), the value of the casting and what it will take to fix the crack(s) versus what it would cost you to replace the casting. Read what your options are in this Larry Carley feature.