Cimarron V6-173 2.8L (1986)
Figure 2 - Converter Cut Line
3.
Using tool J-35976, BT-8252, or equivalent, cut the intermediate pipe at the converter as close to the weld as possible. Refer to Figure 2.
4.
DeVilles and Fleetwoods - Cut the exhaust pipe at the converter as close to the weld as possible. Refer to Figure 2. Eldorados and Sevilles -
Remove the two bolts and springs from the exhaust pipe to converter flange.
5.
Remove the catalytic converter (and seal on Eldorados and Sevilles).
6.
Collapse and remove the portion of the catalytic converter inlet/outlet remaining in the intermediate pipe (and exhaust pipe on DeVilles and
Fleetwoods).
7.
Install the new catalytic converter. The converter inlet/outlet will fit inside the existing pipes.
8.
Eldorados and Sevilles - Install a new exhaust pipe to converter seal, P/N 1633384. Install the exhaust pipe to converter flange bolts/springs and
tighten to 20 nm (15 lbs. ft.) torque. DeVilles and Fleetwoods - Install a guillotine-type clamp, P/N 15595048, at the exhaust pipe to converter
fitting. Tighten to 35 nm (26 lbs. ft.) torque.
9.
Install a guillotine-type clamp, P/N 15595048 (except C-touring use 3634476), at the intermediate pipe to converter fitting. Tighten to 35 nm (26
lbs. ft.) torque.
10. Reconnect the AIR hose, lower vehicle, start engine, and check for exhaust leaks.
PARTS LIST
Part Name
Model
P/N
Catalytic Converter
DeVille/Fleetwood
25128764
Catalytic Converter
DeVille Touring Coupe/Sedan
25103959
Catalytic Converter
Eldorado/Seville
25128765
Broughams and Cimarrons:
If proper vehicle operation is verified and the odor condition persists, install a new catalytic converter using the part numbers listed below:
Model
P/N
1986-1987 Brougham (federal emissions)
25103919
1986-1987 Brougham (California emissions)
25103918
1986 Cimarron
25104705
1987 Cimarron
25104025
