Volvo Penta D2-55 Workshop Manual

16
Design and function
Component description
Cylinder head
The cylinder head is made from specially alloyed cast
iron. It has replaceable valve seats for inlet and ex-
haust valves on D2-55 A/B/C and for exhaust valves
on D2-75 A.
Engine block
The cylinder block is cast in one piece from specially
alloyed cast iron.
Flywheel
An elastic coupling with a rubber damping element is
screwed onto the flywheel. The coupling transfers the
power to the reverser/S-drive.
Timing gear
The timing gears comprise both straight-cut and heli-
cal gears.
The camshaft and sea water pump are driven from the
crankshaft gear via an idler gear. The engine’s lubrica-
tion pump is integral with the idler gear, and is driven
by it. Regulator weights are suspended on the front of
the camshaft gear.

Volvo Penta D2-55 Specifications

General

Engine Type	Diesel
Number of Cylinders	4
Power Output	55 hp
Aspiration	Naturally aspirated
Alternator	115 A
Fuel System	Direct injection
Bore x Stroke	84 mm x 100 mm
Cooling System	Freshwater cooling with heat exchanger
Width	523 mm
Displacement	2.2 l (134 cu in)