Fulltext TSBs

Technical Service Bulletins

TSB
04-20-6
  • TICKING OR KNOCKING NOISE COMING FROM THE CATALYTIC CONVERTERS
Publication Date: October 1, 2004

FORD:
1997-1998 F-250 LD
1997-2003 F-150

ISSUE:

Some 1997-2003 F-150 vehicles equipped with any engine, and 1997-1998 F-250 LD vehicles equipped with the 5.4L engine, may exhibit a ticking or knocking noise coming from the catalytic converters. The noise may be described as sounding like a diesel engine. The condition will be present when the vehicle is in gear at idle only, and is more pronounced when the vehicle is stationary, such as sitting in a drive-through line. The noise is normal, and is created by engine pulses being amplified through the light-off converters.

ACTION:

DO NOT replace converters unless loose internal components are found. To reduce the noise, install a wrap kit on each of the light-off converters. Refer to the instruction sheet included in the kit.


PART NUMBERPART NAME
4L3Z-5E258-ACExhaust Shield Kit

WARRANTY STATUS:

Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage

OPERATIONDESCRIPTIONTIME
042006AInstall Wrap Kit On Both Light-Off Converters (Includes Time To Perform Road Test)0.7 Hr.

DEALER CODING

BASIC PART NO.CONDITION CODE
5E21242

NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information that could assist in proper vehicle service. The procedures should not be performed by “do-it-yourselfers”. Do not assume that a condition described affects your car or truck. Contact a Ford, Lincoln, or Mercury dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article. The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supercede this information with updates. The most recent information is available through Ford Motor Company’s on-line technical resources.

Copyright © 2004 Ford Motor Company