Engine Identification; Lubrication Circuit; Engine Description - Ford VSG-411 Service Manual

Basic Engine
l-02
IDENTIFICATION
An Identification Decal (Fig. 1) is affixed to the left side of the
rocker cover of each engine. The decal contains the engine serial
number which identifies this unit from all others. Next is the
engine displacement which determines the engine specifications,
then the model number and S .O. or special options which deter-
mine the parts or components required on this unit. Use all
numbers when seeking information or ordering replacement parts
for this engine.
FIG. 2 A - Serial Number
B - Engine Code
C - Engine Build Date
FIG. 1 Identification Decal
Identification of the cylinder block and therefore of the basic
engine type can be made by reference to the stampings on the left
rear top edge of the cylinder block (Figure 2).
The engine code will begin with a "G." This will indicate that it
is a 1.1 liter engine.
The engine build date follows the corporate system. Example:
"4K26". The first number indicates the year. The letter indicates
the month in alphabetical sequence, A January, B February, etc.
omitting I. The last two numbers are the day of the month.
DESCRIPTION
The engine is a water-cooled, 4 cylinder, 4 stroke, in-line
gasoline engine. The cylinder head in which the combustion
chambers are located is of a cross-flow type, the fresh fuel/air
mixture is drawn in on one side and burnt gases are passed into the
exhaust system on the opposite side.
The valves are suspended in the cylinder head and are operated
by means of tappets, pushrods and rocker arms.
The valves are disposed in an alternating pattern in the cylinder
head starting with an exhaust valve by the thermostat housing.
The three-bearing camshaft is located on the right side of the
cylinder block and driven by roller chain from the crankshaft.
The common driving gear shared by the distributor and oil
pump is located behind the second cam on the camshaft, the
eccentric cam driving the fuel pump is located between the sixth
and seventh cams.
The oil pump is bolted onto the outside of the cylinder block
below the distributor. The full-flow oil filter is angled downwards
and mounted directly on the oil pump.
The crankshaft is mounted in three or five bearings (see section
8). The crankshaft end play is determined by thrust half rings at the
center main bearing.
The front crankshaft journal is sealed by means of an oil seal
installed in the timing cover.
The rear crankshaft journal is sealed by means of an oil seal
pressed into an oil seal carrier.
The timing cover has cast ignition timing degree marks or a
TDC reference pointer. A notch on the crankshaft belt pulley is
used in conjunction with either the degree or TDC reference points
when installing the distributor and checking timing. They are
visible on the front, left side of the engine.
The spark plugs have a tapered seat without a sealing ring.
Engine Ventilation, Figure 4.
The ventilation system consists of an oil filler cap with two
connecting hoses, one of which passes to the inlet manifold and
the other to the air cleaner.
The result is a closed ventilation system in which the fumes
from the crankcase pass back via the inlet manifold into the
cylinders for combustion.
Gas flow is regulated by a calibrated orifice in the oil filler cap.
Lubrication circuit, Figure 5.
An eccentric twin-rotor oil pump draws oil via a strainer from
the sump and forces it into the full-flow oil filter.
Oil pressure is regulated by a relief valve inside the pump. The
filtered oil passes through the center of the filter element, then
along a short passage (right hand side of the engine) to the oil
pressure switch and through a transverse bore to the main oil
gallery (left hand side of the engine).
The crankshaft main bearings are fed directly from the main oil
gallery and the camshaft bearings are linked, in turn for their
lubrication with the front, center and rear main bearings. Each of
the rod journals are supplied with oil by the nearest main bearing
through oblique passages.
An oil hole in the connecting rod ensures splash lubrication of
the piston pins and the trailing side of the cylinders. Timing chain
and sprockets are also lubricated via a splash hole. The camshaft
front bearing journal has a machined groove through which oil is
intermittently forced to the rocker shaft (via passages in cylinder
block and cylinder head).