Both camshafts were driven by a single belt which had round profile teeth for quiet operation and was constructed of wear-resistant double canvas and heat resistant rubber materials with a wire core.
The crankcase for the EJ251 and EJ252 engines had five main bearings and the flywheel housing was cast with the crankcase for increased rigidity.
Like other EJ Phase II engines, the crankshaft thrust bearing was positioned at the rear of the crankshaft to reduce the transfer of natural engine frequencies to the transmission and driveline.
Subaru EJ251 and EJ252 engines Model Engine Trans.
Due to the cylinder head offset, the left camshaft was longer than the right camshaft to align the cam belt sprockets.
Other features of the pistons included solid-type piston skirts, flat top combustion surfaces and reduced top land to cylinder clearance.