Exhaust System - Buzzing/Rattling Noise
Article No.98-20-10
10/12/98
^ EXHAUST SYSTEM - LOOSE CATALYST OR
MUFFLER HEAT SHIELDS
^ NOISE - "BUZZING" OR "RATTLING" - LOOSE
CATALYST OR MUFFLER HEAT SHIELDS
FORD:
1993 FESTIVA
1993-94 TEMPO
1993-97 PROBE, THUNDERBIRD
1993-99 CROWN VICTORIA, ESCORT, MUSTANG, TAURUS
1994-97 ASPIRE
1995-99 CONTOUR
LINCOLN-MERCURY:
1993-94 CAPRI, TOPAZ
1993-99 CONTINENTAL, COUGAR, GRAND MARQUIS, SABLE, TOWN CAR, TRACER
1995-99 MYSTIQUE
LIGHT TRUCK:
1993-96 BRONCO
1993-97 F SUPER DUTY, F-35O
1993-99 AEROSTAR, ECONOLINE, EXPLORER, F-150, F-250 LD, RANGER
1995-99 WINDSTAR
1997-99 EXPEDITION, MOUNTAINEER, VILLAGER
1998-99 NAVIGATOR
1999 F-250 HD, SUPER DUTY F SERIES
This TSB article is being republished in its entirety to include additional vehicles and to include 1999 model year vehicles.
ISSUE
A "buzzing" or "rattling" noise from the exhaust system may be caused by a loose heat shield attachment to the catalytic converter, catalytic pipes, muffler pipes and/or muffler. The noise is noticeable during normal driving conditions or at engine idle.
ACTION
Install worm clamps to secure loose heat shield attachments. Refer to the following Service Procedure for details.
SERVICE PROCEDURE
1. Inspect for loose shields. If shield(s) is missing, this TSB does not apply. Refer to the appropriate Service or Workshop Manual for repair procedures
NOTE
UNDER NO CIRCUMSTANCES SHOULD A HEAT SHIELD BE REMOVED WITHOUT REPLACEMENT BEFORE THE VEHICLE IS RETURNED TO THE CUSTOMER.
2. Install worm clamps to the catalytic converter, catalytic pipes, muffler pipes or muffler as shown in Figure 1 for the typical light truck and Figure 2 for the typical passenger car.
3. Align the clamps to secure the heat shield to the catalytic converter, catalytic pipes, muffler pipes or muffler as required.
4. Tighten the clamps to 6.8 N.m (60 lb-in).
5. Trim the excess "ear" of the clamp to approximately 2.54 cm (1").
PART NUMBER PART NAME
FOTZ-5A231-A Worm clamp (4-1/2" To 9-1/2")
W705949-S300 Worm clamp (3/4" To 4")
OTHER APPLICABLE ARTICLES: NONE
SUPERSEDES: 98-6-4
WARRANTY STATUS: Eligible Under Basic Warranty Coverage For 1991 And Prior Models Bumper To Bumper Warranty Coverage For 1992-99 Models, And Any Applicable Emissions Warranty Coverage
OPERATION DESCRIPTION TIME
982010A Install One (1), Two (2), Or 0.3 Hr.
Four (4) Worm Clamps
DEALER CODING
CONDITION
BASIC PART NO. CODE
5E258 33
OASIS CODES: 403000, 702000, 702100, 702200, 703000