Under heavy vehicle loading, trailer towing andor high
outside temperatures, the fan speed increases as
the clutch
more fully engages.
So you may hear an increase in fan
noise. This is normal and should
not be mistaken as the
transmission slipping or making extra shifts. It is merely
the cooling system functioning properly. The fan will
the clutch partially disengages.
- slow down when additional cooling is not required and
8. Then replace the pressure cap. At any time during
this procedure
if coolant begins to flow out of the
filler neck, reinstall the pressure cap. Be sure the
arrows on
the pressure cap line up like this.
You may also hear this fan noise when you start
the engine.
It will go away as the fan clutch
partially disengages.
5-19
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Tampering With Noise Control
System Prohibited
Federal law prohibits the following acts or the
causing thereof:
1. The removal or rendering inoperative by any person,
other than for purposes of maint,enance, repair or
replacement, of any device
01- element of design
incorporated into any new vehicle
for the purpose of
noise control, prior to its sale or delivery to the
ultimate purclwser
or while it is in use; or
2. The use of the vehicle after SLIC~ device or element
of design has been removed or rendered inoperative
by any person.
Among those acts presumed to constitute tampering are
the acts listed below.
insulation:
0 Removal of noise shields or underhood insulation.
Engine:
Removal or rendering engine speed governor (if so
equipped) inoperative so as to allow engine speed to
exceed manufrtctureer specifications.
Fan and Drive:
Removal of fan clutch (if so equipped) or rendering
clutch inoperative.
0 Removal of fan shroud (if so equipped).
Air Intake:
0 Reversing air cleaner cover.
Exhaust:
6-10
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