Exhaust - Boom
Number: 83-T-26Section: VIII
Date: Mar., 1983
Subject: EXHAUST BOOM - 1983 CELEBRITY AND CITATION CARS WITH 2.5L L4 ENGINE
TO: ALL CHEVROLET DEALERS
An exhaust boom may occur on 2.5L 1983 Celebrity and Citation models in the 1500 to 1700 rpm range (30-50 mph).
The condition is usually alleviated by loosening the two (2) ball socket bolts at the catalytic converter attachment, pull converter downward to make sure ball joint is free, then raise front pipe at converter completely up to underbody and hold there while torquing the two (2) bolts to 20-24 N-m (15- 17 ft.lb.). This will remove excess pressure for loading of exhaust hangers.
Inspect the system to insure that adequate clearance is maintained after repositioning.
Labor Operation Number: L2004
Labor Time : .3 hours