Exhaust System - Droning Sound
NUMBER: 11-01-00GROUP: Exhaust
EFFECTIVE DATE: July 21, 2000
SUBJECT:
1700-2400 RPM Exhaust Drone
OVERVIEW:
This bulletin involves installing a revised muffler/tailpipe assembly containing an end cap reinforcement.
MODELS:
2000 (XJ) Cherokee
SYMPTOM/CONDITION:
Some vehicles may exhibit a droning sound coming from the exhaust system with the engine operating between 1700 and 2400-RPM. This sound can be heard either in neutral or in gear while driving.
DIAGNOSIS:
With the engine at operating temperature and the transmission in park, raise the engine speed to 1700 RPM and slowly raise it further to 2400 RPM. If the sound is present and there are no other related conditions such as grounded engine/transmission supports or exhaust system components, perform the Repair Procedure.
PARTS REQUIRED:
1 05019872AA Muffler/tailpipe - (Non Flanged Exhaust - MDH 0116XX and prior)
1 52011262AH Muffler/tailpipe - (Flanged Exhaust - MDH 0117XX and later)
REPAIR PROCEDURE:
Using the procedures outlined in the 2000 Cherokee Service Manual, publication number 81-370-0046,section 11 page 6, remove the original muffler and tailpipe assembly and install the appropriate assembly listed above.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No:
Muffler - Replace - Flanged Exhaust
11-30-01-95 0.3 Hrs.
Muffler - Replace - Non-flanged Exhaust
11-30-01-96 0.5 Hrs.
FAILURE CODE: P8 - New Part
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