PART 8: MAINTENANCE AND SERVICE NOISE CONTROL SYSTEM
(R05/10) Y53-6032 – 223 –
(1) The removal or rendering inoperative by any person
other than for maintenance, repair, or replacement, of any
device or element of design incorporated into any new
vehicle for the purpose of noise control prior to its sale or
delivery to the ultimate purchaser or while it is in use, or
(2) the operation of the vehicle after such device or ele-
ment of design has been removed or rendered inoperative
by any person.
Among those acts presumed to constitute tampering are
Engine Cooling System
• Removing or rendering inoperative the fan clutch.
• Removing the fan shroud.
Air Intake System
Removing or rendering inoperative the air cleaner / silenc-
ers or intake piping.
Exhaust System
• Removing or rendering inoperative the exhaust sys-
tem components.
• Inner Fender Shields and Cab Skirts
• Removing shields or skirts.
• Cutting away parts of shields, skirts or damaged or
loose portions of shields or skirts.
Fuel System
• Removing or rendering engine speed governor inop-
erative, allowing engine speed to exceed manufac-
turer’s specifications.
• Removing air signal attenuator on engines equipped
with this device.
Noise Insulating Blankets
• Removing noise insulators from engine block or from
around the oil pan.
• Cutting holes in, or cutting away part of, noise insula-
tors.
• Removing hood-mounted noise insulation.
Engine Electronic Control Unit (ECU)
Modifying ECU parameters.
Y53-6032.book Page 223 Monday, May 24, 2010 3:37 PM
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