Vehicles using M25/660 engine list:

Engine M25/660 commonly faces fuel injection pump wear, leading to poor starting and rough running. Diagnose by checking fuel delivery pressure and injector spray patterns. Prevent issues with regular fuel filter changes and clean, quality diesel fuel. Injector clogging is frequent; clean or replace injectors if misfires occur. Overheating can result from radiator blockages—flush cooling system periodically and inspect hoses. Valve stem seal wear causes smoke; check valve clearances and replace seals as needed. Regular oil changes with correct grade oil prevent premature wear. Address turbocharger issues by inspecting for shaft play and oil leaks. Timely maintenance ensures reliability and longevity.