General Motors 93183493 Oil Pump Housing Cover Assembly

The 93183493 is a timing gear housing assembly integrating the oil pump cover, designed for General Motors Family 0 ECOTEC 1.0L, 1.2L, and 1.4L naturally aspirated petrol engines. Constructed from die-cast aluminum alloy, the housing incorporates the oil pump rotor cavity, pressure relief valve bore, and timing chain drive interface. It mounts directly to the cylinder block with a multi-bolt pattern and seals via a formed-in-place gasket or composite gasket. The component serves as the front engine cover, enclosing the timing chain drive and supporting the crankshaft front seal. OEM cross-references include 55556309, 5638040, 5638113, and 93181959. Applications span Opel Agila A, Astra G/H, Corsa C/D, Meriva A, Tigra B and Vauxhall equivalents produced 2003-2014. Service replacement requires timing chain removal and proper torque sequence to maintain oil pressure integrity and timing alignment.