Mitsubishi Tech Tip: Front Exhaust Pipe ­Heatshield Noise

Mitsubishi Tech Tip: Front Exhaust Pipe ­Heatshield Noise

Mitsubishi owners may notice a rattle noise created by loose or corroded front exhaust pipe heat shields. This bulletin advises about the availability of heat shields as spare parts, preventing the need to replace the front exhaust pipe.

Customers may notice a rattle noise created by loose or corroded front exhaust pipe heat shields. This bulletin advises about the availability of heat shields as spare parts, preventing the need to replace the front exhaust pipe. This bulletin supersedes TSB-07-15-002REV, issued June 2007.

Affected Mitsubishi Vehicles

2004 – ‘11 Galant

2004 – ‘11 Endeavor

2006 – ‘12 Eclipse

2007 – ‘12 Eclipse Spyder

Procedure: Do not replace a front exhaust pipe to repair a heat shield rattle or other noise. Replace or remove only the ­affected heat shield(s) according to the following instructions. Refer to TSB-11-15-002 for heat shield replacement procedures.

For Galant and Eclipse/Eclipse Spyder equipped with 2.4L engines built before Dec. 4, 2006:

When performing repairs on the front exhaust pipe of these vehicles, replace the front exhaust hanger with the new heat-resistant part indicated.

  1. Remove the heat shields and clamps from Front Exhaust Pipe 1 in Fig 1.
  2. Remove three heat shields from Front Exhaust Pipe 2 in Fig. 1 as follows:
  • Both rear heat shields and rear clamp.
  • The bottom-front heat shield.
  • Retain the top-front heat shield and secure it with two ­remaining clamps.
  1. Replace the front exhaust hanger with a new heat-resistant part.

Note: These heat shields have been eliminated on service replacement front exhaust pipes.

For all other vehicles:

  1. Determine which heat shield(s) is the source of the noise or rattle and replace them. Use a new sealing ring (where applicable) and gaskets when reinstalling front pipes (V6 only).

Galant and Eclipse/Eclipse Spyder 2.4L

  1. Replace heat shields. Torque the heat shield clamp bolts to 6.5 +/- 1.5 Nm (58 +/- 13 in.-lb.).

Endeavor

  1. Remove the front pipe to ­access the heat shields.
  2. Replace the heat shields. Torque heat shield clamp bolts to 6.5 +/- 1.5 Nm (58 +/- 13 in.-lb.).
  3. During reinstallation, torque the pipe connections to 49 +/- 4 Nm (37 +/- 2 ft. lb.).

Galant and Eclipse/Eclipse Spyder 3.8L V6

  1. Remove front pipe 1 (“Y”) pipe in Fig. 2.
  2. Remove front pipe 2 in Fig 2.
  3. Replace the heat shields. Torque the heat shield clamp bolts to 6.5 +/- 1.5 Nm (58 +/- 13 in.-lb.).
  4. During reinstallation, torque all pipe connections to 49 +/- 4 Nm (37 +/- 2 ft.-lb.).

Courtesy of ALLDATA.

You May Also Like

Toyota Direct Injection? Port Injection? Why Not Both?

Port fuel injection and direct fuel injection systems each have their advantages and disadvantages.

If you’ve serviced import vehicles for at least the past decade, you may have seen a Toyota vehicle that has both direct fuel injection and port fuel injection. You will see port fuel injectors in the intake manifold and a direct injection fuel pump. Toyota calls this system the D-4S or Dynamic Force Engine (the “S” stands for superior) and the earliest application was on the Lexus GS SUV with the V8. The D-4S system is not a “cold start” or “dousing” injector system, like that on V6 engines from the early to late 2000s.

Toyota Squeaking Noise From Rear Suspension 

Follow the repair procedure in this bulletin to address this condition.

Toyota Milliwave Calibration Tips

Calibration is necessary due to several factors affecting the radar’s functionality.

Different Nameplates, Different Expectations

Honda is one of the least concerned manufacturers about system voltages when it comes to reflashing.

Nissan Electro Hydraulic Steering

Nissan’s steering system is susceptible to driver-error.

Other Posts

Subaru HVAC Diagnostics

On some more modern Subaru vehicles, you might be better off grabbing your scan tool.

New Motor Mount Technology

Engine speed is the primary input that determines the stiffness of the mount.

Subaru Tech Tip: Spiderwebs Blocking The Camera

If the webs can be removed without touching the camera lens, carefully remove them and reassemble the camera.

Nissan Suspension Restoration

The shock or strut controls how the energy in the spring is absorbed and compressed.