Phoenix L4-151 2.5L VIN 5 2-bbl (1982)
Exhaust Pipe/Muffler Hanger: Customer Interest
Exhaust System - Booming Noise
Number 84-6 (Gasoline)-36
Date 5/84
Subject:
1500 RPM BOOM - 1982-84 6000 (INCLUDING WAGONS) AND PHOENIX VEHICLES EQUIPPED WITH LR8 ENGINE
Condition
Some 1982-1984 6000 and Phoenix vehicles equipped with the LR8 engine may exhibit a loud booming noise at 1500 rpm.
Cause
This condition may be caused by the catalytic converter hanger being preloaded.
Correction
To correct this condition the following procedures should be followed.
1.
Remove the load from the catalytic converter exhaust hanger.
a..
Loosen the converter and manifold
flange joint bolts.
b.
Break the converter joint loose.
c.
Retighten the bolts to 20-40 N-m (15-30 ft.lbs) while holding the converter up against the heat shield.
d.
Make sure the distance between the upper and lower converter hanger rivets is less than 62 mm.
2.
Install a newly released additional cradle dampener assembly (see illustration).
PART NUMBER
DESCRIPTION
22527158
Dampener Assembly
10021800
Bolt
Do not remove the existing dampener.
