NOISE EMISSION CONTROL Air Intake System Engine Mounted Noise Insulators Exhaust System Do all checks and maintenance procedures listed in this manual under Engine Air Intake System and Air Cleaner. See Air Dryer on page 5-60. Check condition. Is the insulator secure? How you do this will depend on the method of attaching the noise insulators on the engine and around the oil pan (bolts, snap fasteners, or straps). Tighten loose fasteners and repair or replace any worn or damaged fasteners. Check for exhaust leaks, which would indicate a leaking manifold gasket; replace gasket if necessary.
Check the induction tubing, elbow connections, clamps, brackets, and fasteners for deterioration, cracks, and security. Check cap screws for tightness, including those at the flanges. Refer to the engine manufacturer's service manual for proper tightening sequence and torque values. Check insulators around fasteners and stress points, especially where they may be affected by engine vibration. Repair any cracked or damaged mounting points. Use suitable reinforcing plates to ensure that the insulators will remain in position. If you find an air leak anywhere between the air cleaner and the engine, repair that leak immediately.
5 CAUTION Air leaks cause excessive noise and may result in serious damage to the engine. If you do not repair them the engine damage will not be covered by your warranty. Repair all air leaks as soon as you find them. (03/17) Y53-6077-1B1 5-125