Exhaust System - Tailpipe Contacts Underbody
NUMBER: 11-003-11GROUP: Exhaust System
DATE: April 20, 2011
THIS SERVICE BULLETIN IS ALSO BEING RELEASED AS RAPID RESPONSE TRANSMITTAL (RRT) 11-037. ALL APPLICABLE SOLD AND UN-SOLD RRT VIN's HAVE BEEN LOADED. TO VERIFY THAT THIS RRT SERVICE ACTION IS APPLICABLE TO THE VEHICLE, USE VIP OR PERFORM A VIN SEARCH IN TECHCONNECT. ALL REPAIRS ARE REIMBURSABLE WITHIN THE PROVISIONS OF WARRANTY.
SUBJECT:
Tailpipe Contacting Underbody
OVERVIEW:
This bulletin involves inspecting the exhaust tailpipe for proper clearance between the tailpipe and crossmember and adjusting the exhaust system if necessary.
MODELS:
2011 KA NWo
2011 KK Liberty
NOTE:
This bulletin applies only to vehicles built before March 10, 2011 (MDH 0310XX).
DISCUSSION:
The exhaust system gaging button may have been incorrectly welded onto the exhaust y-pipe which may cause the exhaust pipe to be incorrectly positioned. An incorrectly positioned exhaust pipe may have the tendency to cause the tailpipe to come in contact with the rear crossmember when driving over rough roads.
SYMPTOM/CONDITION:
The exhaust system tailpipe may come in contact with the rear crossmember. An exhaust system that comes in contact with any underbody components may cause noise while driving the vehicle.
DIAGNOSIS:
If a customer's VIN is listed in VIP or your RRT VIN list, perform the repair. For all other customers that describe the symptom/condition, perform the Repair Procedure.
REPAIR PROCEDURE:
1. Raise the vehicle on a hoist.
2. Measure the clearance between the tailpipe and the rear crossmember (Fig 1).
3. If the clearance is less than 15mm (19/32 in.) on a Nitro or 20mm (51/64 in.) on a Liberty, proceed to the next step. If the clearance is greater than 15mm (19/32 in.) on a Nitro or 20mm (51/64 in.) on a Liberty, no repair action is necessary.
4. Scribe a mark on the front edge of the exhaust extension pipe to the y-pipe (Fig 2). This will aid in setting the extension pipe to the proper depth upon reassembly.
5. Loosen the exhaust torca clamp and separate the exhaust extension pipe from the y-pipe.
6. Using a hammer and chisel, knock the gaging button from the y-pipe.
7. Using a file or a grinder, remove any burrs from the pipe so that the surface is smooth before installation.
8. Reconnect the exhaust extension to the y-pipe setting the depth of the pipe to the mark that was scribed in Step 4.
9. Position the exhaust so that the clearance between the tailpipe and rear crossmember is at least 15mm (19/32 in.) on a Nitro or 20mm (51/64 in.) on a Liberty.
10. Secure they-pipe to the extension pipe with the torca exhaust clamp. Torque the clamp to 55 N.m +/-8 N.m (12 ft. lbs. +/-2 ft. lbs.).
11. Lower the vehicle.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
FAILURE CODE:
Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.