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O2 Sensor Replacement[240-260/85] posted by Chip Hewette on
Sunday, 19 July 1998, at 5:13 p.m.
(1)How do I remove sensor without damage to exhaust? I have special O2 sensor socket, but removal force seems excessive.
(2)Do I use "never-seize" on new O2 sensor threads?
(3)Does anyone know how to use the HTML Helpers at the right of the message window?
--Chip
Re: O2 Sensor Replacement[240-260/85] posted by Stephen Ringlee on
Monday, 20 July 1998, at 5:50 p.m.
1. Soak with Liquid Wrench or a non-silicone-based penetrant for a good day beforehand, and cycle the exhaust through a warmup to try to get the penetrant well down. I use Liquid Wrench, but find PB Blaster better at tough jobs. Try removing it when the exhaust is warm (not hot), but with a ice-cube held against the sensor threads to cool it down and maybe thermally break the bond. Watch the sensor wrench, since they are split down the middle and can bend. Also, try removing with a breaker bar on the wrench, banging the bar end with a hammer using small but sharp strokes.
2. The sensors come pre-coated; don't use additional anti-seize. Don't get anything with silicone anywhere near the sensor (or the intake system, for that matter:) it will contaminate the sensor. Don't use dielectric grease on the sensor connector.
3. Never used them; don't know.
Re: O2 Sensor Replacement[240-260/85] posted by Stoney on
Monday, 20 July 1998, at 10:13 p.m.
Another method of cooling the sensor to make the breaking free easier is to spray some "Dust Off" canned air on the sensor-hold the can upside down so te supercool propellant (yes it's non flamable) goes on the sensor not the pipe.
This was much easier when they used Chloroflourocarbons AKA Freon...also try some of the stuff computer guys use to cool monitor parts, etc...its called Chill or Freeze or something...try an electronics repair shop.