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NHTSA ID Number: 10161937
Manufacturer Communication Number: 18NA172
Summary
This technical bulletin provides a procedure to modify the right rear exhaust control valve actuator to correct a rattle noise heard from the rear of the vehicle.
10 Affected Products
Vehicles
SEOCONTENT-START
Bulletin No.: 18-NA-172
Date: May, 2019
Service Bulletin
TECHNICAL
Subject: Rattle Type Noise Heard from Rear of Vehicle
| Brand: | Model: | Model Year: | VIN: | Engine: | Transmission: | |||
| from | to | from | to | |||||
| Chevrolet | Camaro | 2016 | 2019 | Equipped with 6.2L Engine (RPOs LT1, LT4) | ||||
| Corvette | 2014 | Equipped with 6.2L Engine (RPOs LT1, LT4, LT5) | ||||||
| Involved Region or Country | North America and N.A. Export Regions |
| Additional Options (RPOs) | Vehicles equipped with EXHAUST SYSTEM-PERFORMANCE (RPO NPP) |
| Condition | Some customers may comment on a rattle type noise heard coming from the rear of the vehicle. |
| Cause | This condition may be caused by the right rear exhaust control valve actuator. |
| Correction | Modify the right rear exhaust control valve actuator following the Service Procedure below. |
Service Procedure
- Remove the right rear exhaust control valve actuator from the pipe. Refer to Exhaust Control Valve Actuator Replacement in SI.
5080869
- Use a vise to hold the actuator and cut off the leg,as shown in the illustration above, using a die grinder or cut-off wheel.
Important: DO NOT remove the metal coupling disc from the actuator. If removed, you will disrupt the Loctite’d screw and would need to relearn the valves since the alignment may have changed.
Warranty Information
For vehicles repaired under the Emission coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information.
| Labor Operation | Description | Labor Time |
| 4086258* | Removing Leg Off of the Right Rear Exhaust Control Valve Actuator | 0.7 hr |
| *This is a unique Labor Operation for Bulletin use only. | ||
| Version | 3 |
| Modified | Released May 22, 2018
August 10, 2018 – Added the 2019 Model Year and the Corvette Model. May 16, 2019 – Added the 2016-2017 Camaro Models and 2014-2017 Corvette Models. |
SEOCONTENT-END
Bulletin No.: 18-NA-172
Date: May, 2019
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