Engine - Engine and crankcase
Engine - Overview
Number location (4710 model)
NOTE:
The engine number is stamped on the camshaft
tunnel of the cylinder block. (Right-hand side of the en-
gine).
When requesting information regarding the engine. The
number should be quoted.
GNIL14TR04882AA
1
Cylinder head assembly
The cylinder head incorporates valves and springs, with the valve rocker arm shaft assembly bolted to the cylinder
block through the cylinder head. Cylinder head retaining bolts are evenly spaced with a six-point pattern around each
cylinder, this ensures an even clamping load across the cylinder head.
Archetype intake and exhaust manifolds are bolted to the head the intake manifold is mounted on the right side of the
engine, with the diesel injectors mounted outside the rocker cover. The exhaust manifold is mounted on the left side
of the engine.
Cylinder block assembly
The cylinder block is an alloy cast iron with deep cylinder skirts and water jackets for cooling the cylinders. The
cylinder bores are replaceable types and over sizing of sleeves is not recommended. Cylinders are inline and vertical
and numbered from 1 to 3 from front of the engine to the rear.
The oil pan, which is attached to the bottom of the cylinder block is the reservoir for the engine oil lubrication system
is mounted on the left hand side of the engine. Water outlet connections and thermostat being attached to the front
of the cylinder head directly behind the radiator.
Camshaft assembly
The camshaft gear is in mesh with and driven by idler gear which is driven by the crankshaft timing gear. The camshaft
end float is taken up by a steel spring riveted to the timing case front cover.
Crankshaft assembly
The crankshaft is supported in the cylinder block by 4 bearings.
The crankshaft is manufactured from molybdenum thrust washers incorporated in the last main bearing cap towards
the flywheel control end thrust. Front and rear crankshaft oil sealing is effected by one-piece oil seals that are designed
for long and durable service life.
Connecting rods
Connecting rods “Wedge” shaped at the small end has been designed to reduce the reciprocating weight at the piston
end. The connecting rods are heavy beam construction and are assembled to the crankshaft, by means of insert type
bearings.
They are retained in position by the connecting rod big end cap and secured by two bolts per rod. The small end
of the connecting rod is fitted with a replaceable bushing, through which the free floating piston pin is fitted. The
steel pin being held in place within the piston by two snap rings (circlip). While assembling connecting rods to engine
numbered side should come towards fuel injection pump side.
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