36
OXE 150/200 HP SERVICE MANUAL
ENGINE COMPONENT DESCRIPTION
ENGINE COMPONENT DESCRIPTION
Camshaft
Two camshafts are used, one for all intake valves, the other for all exhaust valves.
The camshafts are cast iron. The second camshaft is driven by a cam to cam gear.
Camshaft drive
A timing belt is used for camshaft drive. There is a tensioner to control the tension
of the belt.
Cylinder block
The cylinder block is a cast iron with 4 cylinder in-line. The block has 5
crankshaft bearings with the thrust bearing located on the third bearing from the
front of the engine.
Crankshaft
The crankshaft is a steel crankshaft with 8 counterweights. It is supported in 5
main journals with main bearings which have oil clearance for lubricating.
The 3rd bearing of the 5 main bearing is the thrust bearing where the crankshaft
has properly axial end play. A crankshaft balancer is used to control torsional
vibration.
Cylinder head
This cylinder head is of a double over head camshaft (DOHC) type and has 2
camshafts that open 4 valves per cylinder with the finger followers with roller
type and the valve bridges. The camshaft sprocket wheel is installed in front of the
camshaft. Because of the cam follower of the hydraulic type, it does not need to
adjust for valve clearance. The cylinder head is made of aluminium alloy for better
strength in hardness with light weight. The combustion chamber of plate type of
the cylinder head is designed for increased squish and swirl efficiency in order to
maximize diesel combustion efficiency in the entire rpm-range of the engine..
Exhaust manifold
The exhaust manifold is located to the side of the cylinder head and provide
exhaust gases from the combustion chamber to the turbo charger. It is designed to
properly function under high pressure at a high temperature.
Intake manifold
The intake manifold is air flow passage to the cylinder combustion chamber
and the design is optimized for maximum engine torque, power driveability, fuel
economy and performance and to minimize noise and emissions. The manifold is
made of plastic for optimized strength and keeping it light weight.w
Oil dry sump
The oil dry sump includes an oil return pipe, which is connected to the oil pump.
The dry sump is attached at the bottom of the engine block and the associated oil
reservoar is integrated in the outboard rigg.
Summary of Contents for 30-0100-125
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