Engine with Low Mounted Air Pump
Illustration 20
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i05139813
Product Description
The 400F models are indirect injection engines. The
fuel injection pump is operated by a solenoid that is
controlled by a Pulse Width Modulation (PWM) signal
from the ECM.
The cylinder head assembly has one inlet valve and
one exhaust valve for each cylinder. Each cylinder
valve has a single valve spring.
The pistons have two compression rings and an oil
control ring. It is important to ensure the correct piston
height so that the piston does not contact the cylinder
head. The correct piston height also ensures efficient
combustion of fuel that is necessary in order to
conform to requirements for emissions.
The crankshaft for a three cylinder engine has four
main bearing journals. The crankshaft for a four
cylinder engine has five main bearing journals. End
play is controlled by the thrust washers that are
located on the rear main bearing.
The timing gears are stamped with timing marks in
order to ensure the correct assembly of the gears.
With the timing marks on the crankshaft gear
camshaft gear and the idler gear aligned No. 1 piston
will be at top center compression stroke.
The crankshaft gear turns the idler gear which then
turns the camshaft gear and the gear for the engine
oil pump.
The fuel injection pump is mounted in the cylinder
block. The fuel injection pump is operated by the
camshaft. The fuel pump is located on the right-hand
side of the cylinder block. The fuel pump is electrically
operated.
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SEBU8609
General Information
Product Description