Nissan NV2500 cracked manifold issue frequently requiring replacement every 20,000 miles on Nissan NV2500

Some Nissan NV2500 owners report experiencing recurring issues with cracked manifolds, which may require replacement more frequently than expected, sometimes as often as every 20,000 miles. This problem can lead to complications such as the engine running rich, which may dilute the oil and increase the risk of it escaping through the combustion chamber. If left unresolved, driving with a cracked manifold can potentially result in significant damage to the vehicle. It is crucial for owners to address this issue promptly to prevent further complications and ensure the vehicle operates properly.