Removal and installation of catalyst

Model year 1977/78/79 A. Federal version

Removal

1 Loosen nuts of flange connections on exhaust manifold and unscrew.

2 Remove heat shields.

14.2-200/1 USA 1977/78/79 F 2

3 Remove lateral support on transmission suspen­sion.

4   Remove rubber damper between catalyst and center muffler. Disconnect rubber rings on reso­nance damper and remove exhaust system in down­ward direction.

5   Loosen clamps of underfloor catalyst plug connections. Heat plug connections with a blow torch and remove underfloor catalyst.

Installation

6 Plug catalyst into exhaust system (renew self-locking hex nuts of clamps, as well as those of flange connec­tions). Slightly tighten plug connections.

Install exhaust system and align.

For further installation proceed vice versa. Tighten­ing torque of self-locking hex nuts (6) is 20 Nm (2kpm).

Removal

1 Loosen nuts of flange connections on exhaust mani­fold and screw off.

14.2-200/3 USA 1977/78/79 F 2

2 Remove heat shields.

3 Unscrew air injection lines behind small catalysts.

4 Disconnet lateral support on transmission suspension.

14.2-200/4 USA 1977/78/79 F 2

5   Remove rubber damper between catalyst and center muffler. Disconnect rubber rings on resonance damper and remove exhaust system in downward direction.

6   Loosen clamps of underfloor catalyst plug connec­tions. Heat plug connections with a blow torch and remove front catalysts as well as underfloor catalyst.

Installation

7 Plug catalysts into exhaust system (renew self-lock ing hex nuts of clamps, as well as those of flange con­nections). Slightly tighten plug connections.

Install exhaust system and align.

For further installation proceed vice versa. Tightening torque of self-locking hex nuts (6) is 20 Nm (2 kpm).

1    Exhaust manifold

2    Exhaust pipe

3    Flange

4   Cone connection

6   Self-locking hex nut

7    Hex screw