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2nd Gen Ram Tech1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Removed old o2 to replace with denso. old one came out difficult. Went to thread in the new one and the threads just won't catch. anyone else have this problem?
The O2 bung may have damaged threads. The threads would have been damaged due to galvanic corrosion "welding" the threads together.
You may have to have a new bung welded to replace the old one. Be sure to install the new O2 sensor with Anti-Seize on the threads. Use care in not getting Anti-Seize on the O2 sensor element.