1993-1994 CAPRI, TOPAZ 1993-1999 CONTINENTAL, COUGAR, GRAND MARQUIS, SABLE, TOWN CAR, TRACER 1995-1999 MYSTIQUE
1993-1996 BRONCO 1993-1997 F SUPER DUTY, F-350 1993-1999 AEROSTAR, ECONOLINE, EXPLORER, F-150, F-250 LD, RANGER 1995-1999 WINDSTAR 1997-1999 EXPEDITION, MOUNTAINEER, VILLAGER 1998-1999 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.
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.
Install worm clamps to secure loose heat shield attachments. Refer to the following Service Procedure for details.
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.
UNDER NO CIRCUMSTANCES SHOULD A HEAT SHIELD BE REMOVED WITHOUT REPLACEMENT BEFORE THE VEHICLE IS RETURNED TO THE CUSTOMER.
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.
Figure 1 - Article 98-20-10
Figure 2 - Article 98-20-10
Align the clamps to secure the heat shield to the catalytic converter, catalytic pipes, muffler pipes or muffler as required.
Tighten the clamps to 6.8 N-m (60 lb-in).
Trim the excess "ear" of the clamp to approximately 2.54 cm (1").
Worm Clamp (4-1/2" To 9-1/2")
Worm Clamp (3/4" To 4")
OTHER APPLICABLE ARTICLES:
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