Springs provide controlled force throughout the engine and its ancillaries. This group covers valve springs, injector and governor springs, compression and tension springs used in fuel systems, clutch and brake springs, and the spring elements in tensioners and relief valves. Valve springs are the most safety-critical: as a spring loses free length or fatigue-cracks, valve float, valve-to-piston contact or a dropped valve becomes possible at speed. Springs are usually replaced as complete sets rather than individually, because a new spring alongside fatigued neighbours creates uneven loading across the valve train.
AMS Parts supplies a wide range of springs components for MWM engines used in power generation, marine, and industrial applications. Browse the full range below, or contact us for specific requirements.
Browse our range of Springs parts below. Use the search bar above to find a specific part number, or request a quote.
Measure free length and test the load at the specified installed height against the manufacturer's figures. Any spring with visible corrosion pitting, squareness error or fatigue marks should be replaced.
Yes, generally. Mixing a new spring with fatigued ones produces uneven valve train loading and inconsistent seating pressure across the cylinders.
Fatigue from high cycle counts, surface corrosion acting as a crack initiator, valve float from over-speeding, and resonance at particular engine speeds are the common causes.
