TM 5-3895-382-24
Type 2 Engines and 7BJ Engines
Illustration 2
Cylinder and valve location for Type 2 engines and 7BJ engines
(A) Exhaust valves
(B) Inlet valves
NOTE:
Type 2 engines can be identified in two ways.
Method 1 refers to Illustration 2. When the valve
cover is removed, look at the cylinder head
valves. Type 2 engines alternate the exhaust
valves and the inlet valves.
Method 2 does not require the removal of the
valve cover. Refer to the inlet manifold and the
exhaust manifold. Type 2 engines alternate the
exhaust ports and the inlet ports.
Type .................................................. Four cylinder and four stroke
Combustion system ................................................Direct injection
Bore .................................................................100 mm (3.937 inch)
Stroke ................................................................127 mm (5.00 inch)
Displacement..........................................................4 liters (243 in 3)
Compression Ratio ..............................................................17.25:1
Number of cylinders ........................................................................ 4
Arrangement of cylinders .......................................................in-line
Firing Order.......................................................................... 1, 3, 4, 2
NOTE:
The front end of the engine is opposite the
flywheel end. The left and right side of the engine
are determined from the flywheel end. The
Number 1 cylinder is the front cylinder.
When the crankshaft is viewed from the front of the engine, the
crankshaft rotates in the following
direction ............................................................................. Clockwise
NOTICE
Failure to follow recommended procedures for handling or
transporting engines can lead to engine damage.
To avoid possible engine damage, use the following
procedure.
When you are lifting or moving the engine, use the following
procedures in order to prevent engine damage:
1.
Do not tilt the engine to an extreme angle unless the
lubricating oil is first drained from the oil pan.
2.
Do not turn the engine onto a side or an end surface
unless the lubricating oil is first drained from the oil pan.
3.
If the oil is not drained prior to tilting the engine or
turning the engine onto a side or an end surface, the
lubricating oil from the oil pan can enter the closed
crankcase breather system and flow into the intake
manifold and the cylinder bores. This situation could
cause a hydraulic lock in the engine. Hydraulic lock can
damage the engine.
4.
The engine oil should be refilled to the correct level
before the engine is started.
General Information
SMCS Code: 1000
The engine is a diesel engine which is controlled with a
mechanically actuated fuel injection pump. The four engine
cylinders are arranged in-line.
The cylinder head assembly has one inlet valve and one
exhaust valve for each cylinder. The ports for the inlet and the
exhaust valves are on the right side of the cylinder head. Each
cylinder valve has a single valve spring. Each cylinder has a
piston cooling jet that is installed in the cylinder block. The
piston cooling jet sprays lubricating oil onto the inner surface of
the piston in order to cool the piston. The ports for the inlet
and the exhaust valves are on the right side of the cylinder
head.
The pistons have a Fastram combustion chamber in the top of
the piston in order to provide an efficient mix of fuel and air.
The piston pin is off-center in order to reduce the noise level.
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