Catalytic Converter - Testing/Replacing
Group: 26Number: 82-01
Date: September 24, 1982
Subject: Catalytic Converter
Key Points: Checking/replacement procedure
Part Identifier 2673
Determining need for converter replacement
If exhaust "rattles",
- Check that flanges of exhaust system are tight and heat shields are correctly installed.
^ If "rattle" was not due to loose exhaust system or loose heat shields, converter may have failed.
If exhaust system is tight,
- remove catalytic converter
- look through flange opening
^ If ceramic insert appears broken or melted as shown in both pictures, converter must be replaced.
^ If ceramic insert appears OK, check whether ceramic insert is firmly seated in converter housing. Check as follows:
- while holding converter vertically, firmly tap flange onto solid wood from a distance of 8 inch (20 cm)
- turn converter over and firmly tap other flange as before
^ If no knocking sound, converter is OK.
^ If no movement of ceramic insert, converter is OK.
^ If light knocking sound is heard inside converter, ceramic insert is loose and converter must be replaced.