Tampering with Noise Control System
Federal law prohibits the following acts or the causing thereof:
(1) The removal or rendering inoperative by any person, other than for purposes of
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 use of the vehicle after such device or element of design has been removed or
rendered inoperative by any person.
Among the acts that constitute tampering are the acts listed below:
•
Removal, or rendering inoperative, of any exhaust components, including mufflers,
heavy or double-wall exhaust tubing, flexible tubing or exhaust pipe clamping.
•
Removal, or rendering inoperative, of the temperature-modulated cooling fan system.
•
Removal of the cooling fan shroud.
•
Removal, or rendering inoperative, of the air cleaner or air intake in-line silencer.
•
Removal or rendering inoperative any vehicle body mounted sound insulation
components.
•
Removal, or rendering inoperative, of the engine speed governor so as to allow engine
speed to exceed the manufacturers specifications.
•
Removal of splash shields located inside the wheel housings.
•
Removal of engine block shields.
•
Removal of engine crankcase shields or insulation.
•
Removal of insulated rocker arm covers.
•
Removal of transmission noise shields.
Noise Shielding and Insulation Devices
Maintenance
Ensure sound shielding and insulating devices are intact. Inspect components for damage.
Primary system components requiring noise related inspection include the engine
compartment insulating materials (including engine covers, hatches insulation) wheel
housings, fenders, and body panels. Inspect all related fasteners, brackets, and clamps
for damage and tightness.
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