Arrallen Posted August 29, 2004 Share Posted August 29, 2004 I am trying to remove the O2 sensor on my 90 Reatta. According to the archives it's a two minute no sweat job. Mine seems to be frozen in. I am using the correct special socket removal tool with a 15" breaker bar and got it to move maybe a quarter turn. Anybody have a simular experience and found a solution? Blow torch or penetrating oil work? Link to comment Share on other sites More sharing options...
2seater Posted August 30, 2004 Share Posted August 30, 2004 Warm up the connection by running the engine for a minute or so. Just enough to get it pretty warm to the touch. The new sensor should have anti-seize compound already installed. Link to comment Share on other sites More sharing options...
padgett Posted August 30, 2004 Share Posted August 30, 2004 Definately sounds like it is seized - if can move a 1/4 turn try moving back and forth a bit with some liquid wrench or similar on the threads, should free up.Dunno why but some mechanics (and the factory) sometimes play Godzilla. Proper torque is about the same as for a spark plug. Link to comment Share on other sites More sharing options...
2seater Posted August 31, 2004 Share Posted August 31, 2004 Once it has moved a 1/4" it "should" almost be loose enough to remove by hand. As a matter of fact, your analogy of a spark plug is right on, the threads are 18 mm large spark plug thread and could be chased with a tap if needed. It doesn't sound good for the threads if it cannot be removed by working it back and forth as you suggested. Link to comment Share on other sites More sharing options...
Arrallen Posted September 6, 2004 Author Share Posted September 6, 2004 The sensor must have been put in on a Monday. Sprayed it every night with penetrating oil for a week straight then forced it out using the breaker bar. There were hardly any threads left on the sensor. Used a thread chaser before I installed the new one.Interesting, my check engine light came on every morning until the penetrating oil burnt off. Link to comment Share on other sites More sharing options...
2seater Posted September 6, 2004 Share Posted September 6, 2004 Good to hear you got it out. Interesting that the solvents and hydrocarbons made the O2 sensor act up, but it does make sense. You might want to watch the cross counts for a while to be sure it has recovered completely. Link to comment Share on other sites More sharing options...
padgett Posted September 7, 2004 Share Posted September 7, 2004 New one should not have a problem. I generally use some anti-seize on the threads and tighten like a spark plug. Link to comment Share on other sites More sharing options...
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