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4. Description of the Engine
4.1 Definitions
Fig 4-1 In-line engine and V-engine definitions (1V93C0029 / 1V93C0028)
4.2 Main components and systems
The dimensions and weights of engines are shown in section 1.5 Dimensions and weights .
4.2.1 Engine block
The engine block, made of nodular cast iron, is cast in one piece for all cylinder numbers. It
incorporates the camshaft bearing housings and the charge air receiver. In V-engines the
charge air receiver is located between the cylinder banks.
The main bearing caps, made of nodular cast iron, are fixed from below by two hydraulically
tensioned screws. These are guided sideways by the engine block at the top as well as at the
bottom. Hydraulically tightened horizontal side screws at the lower guiding provide a very rigid
crankshaft bearing.
A hydraulic jack, supported in the oil sump, offers the possibility to lower and lift the main
bearing caps, e.g. when inspecting the bearings. Lubricating oil is led to the bearings and
piston trough this jack. A combined flywheel/trust bearing is located at the driving end of the
engine.
The oil sump, a light welded design, is mounted on the engine block from below and sealed
by O-rings. The oil sump is available in two alternative designs, wet or dry sump, depending
on the type of application. The wet oil sump comprises, in addition to a suction pipe to the
lube oil pump, also the main distributing pipe for lube oil as well as suction pipes and a return
connection for the separator. The dry sump is drained at either end (free choice) to a separate
system oil tank.
4.2.2 Crankshaft
The crankshaft is forged in one piece and mounted on the engine block in an under-slung
way.
Wärtsilä 32 Product Guide - a21 - 7 September 2016 4-1
4. Description of the Engine Wärtsilä 32 Product Guide