The cylinder head seals the top of the combustion chamber and houses the valve train that controls gas exchange, working under the highest thermal and mechanical loads in the engine. This group covers complete heads and castings, inlet and exhaust valves, guides and seats, springs, collets and caps, stem seals, rocker arms and shafts, and camshafts. Gas engine valve train wear differs from diesel practice in an important way: gas fuel provides no lubrication at the valve seat, so seat recession is a defining wear mode on these engines rather than an occasional finding. MWM schedules cylinder head overhaul by operating hours, and heads are typically exchanged or reconditioned as part of the maintenance cycle rather than run to failure.
AMS Parts supplies a wide range of cylinder head & valves 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 Cylinder Head & Valves parts below. Use the search bar above to find a specific part number, or request a quote.
Gas fuel provides none of the lubrication that diesel gives at the valve seat, so the valve gradually beds deeper into the seat. It shows as loss of valve clearance and eventually compression loss.
MWM specifies head overhaul by operating hours as part of the scheduled maintenance cycle. Heads are usually reconditioned or exchanged rather than run to failure.
Thermal loading, detonation events from poor gas quality or incorrect ignition timing, and coolant problems. Knock in particular imposes pressures the head was not designed to absorb.
